Tax2015A Product Data Sheet
Edition 10.21.2011
Sikasil-728 SL
Sikasil®-728 SL
Self-leveling, ultra low-modulus, highway/parking garage, neutral
cure silicone sealant
Description Sikasil-728 SL is a self-leveling,one-component,ultra low modulus,elastomeric,neutral cure silicone seal-
ant.Meets the requirements of ASTM D-5893;ASTM C-920,Type S,Grade P,Class 100/50;Use T,M,G,
A,0 with an ultra low Shore Hardness;TT-S-00230C,Type I,Class A;TT-S-001543A,Class A. t^
Where to Use Construction Application
r4
is Highway joints
is Bridges
•Stadiums
■Parking garages
is Plaza decks
•Driveways
•Decks
•Expansion joints
■Saw cut joints
Substrate
■Concrete,steel,glass,aluminum,tile,ceramic,masonry,asphalt,brick,stone and granite
Advantages ■ No tooling,less labor
is Extremely long service life
■ Ideal for cold climates
• Excellent flexibility for extreme high and low temperature conditions
■ Excellent flexibility for dynamic joint movement
• Bonds to most substrates without priming including asphalt and concrete
• Ready to use,labor cost reduction
• More productivity
• All season ease of application
• Good contact/adhesion with hard to reach areas
• Excellent for use on runways and tarmacs
• Jet fuel resistant
• Resistant to road salts
Typical Data
RESULTS MAY DIFFER BASED UPON STATISTICAL VARIATIONS DEPENDING UPON MIXING METHODS AND EQUIPMENT,
TEMPERATURE,APPLICATION METHODS,TEST METHODS,ACTUAL SITE CONDITIONS AND CURING CONDITIONS.
Shelf Life 12 months in original unopened container.A product skin may form in pails and
drums,remove prior to use.
Storage Conditions Store in unopened containers at temperatures at or below 90°F(32°C).
Colors Limestone and Charcoal Gray.
Uncured Properties at 77°F(25°C).50%R.H.
Cure Time(MNA Method) 1/16"/24 hours
Skin-over Time(MNA Method) 60 min.
Tack Free Time(ASTM C-679) 115 min.
Extrusion Rate(ASTM C-1183 modified) 900 g/min.
1/8"orifice @ 90 psi
Rheological,Vertical(ASTM C-639) self-leveling
@ 120°F(49°C)
VOC Content 2.27%by wt.,29 g/L,0.24 lbs/gal
Service Temperature -80°to 350°F(-62.2°to 176.6°C)
Cured Properties after 7 days at 77°F(25°C).50%R.H.
Movement Capability(ASTM C-719) +100%,-50%
Elongation at Break(ASTM D-412) 1200%
Hardness Shore 00(ASTM C-661 &ASTM 0-2240) 40
Shore A(ASTM C-661 &ASTM D-2240) 3-5
100%Modulus(ASTM D-412) 30 psi(0.21 MPa)
=, Peel Strength(ASTM C-794) 25 pli
Tensile Strength (ASTM 0-412) 100 psi(0.69 MPa)
• M1 Bond Durability on glass,(ASTM C-719) +100%,-50%
aluminum and concrete
Weathering Resistance Excellent
Test results are averages obtained under laboratory conditions.Reasonable variations can be expected.
8190
Packaging 4.5 gal(17 L)in a 5 gal pail;52 gal(197 L)in 55 gal drum;29 oz.cartridges/12 per case. Special packaging
available upon request—ask your local Representative for more information.
How to Use
Installation Joint Design:The number of joints and the joint width should be designed for a recommended joint move-
ment of+25%and-25%at time of installation.The depth of the sealant should be 1/2 the width of the joint.
The maximum depth is 1/2 inch(13 mm)and the minimum is 3/8 inch(10 mm).For joints greater than 1
inch(25.4 mm),do not exceed 1/2 inch(13 mm)in depth.
Joint Backing:To control joint depth,use closed cell polyethylene or non-gassing polyolefin backer rod.If
joint depth does not allow for backer rod,use polyethylene bond breaker tape to prevent three-sided adhe-
sion.
Closed cell backer rod should be 25%larger than joint width;do not compress more than 40%.
Surface Preparation The substrate must be dean,dry,frost free,sound and free of any oils,greases or incompatible sealers,paints or
coatings that may interfere with adhesion.
Porous Substrates—dean by mechanical methods to expose a sound surface free of contamination and
laitance.
Non-porous substrates—for cleaning non-porous substrates,use two rag wipe method using xylene or an
approved commercial solvent.Allow solvent to evaporate prior to sealant application.
Primer Sikasil-728 SL is designed to obtain adhesion without the use of a primer;however,best results are ob-
tained when horizontal joints are primed.Test by applying the sealant and/or primer sealant combination
to confirm results and proposed application methods.Refer to Technical Data Sheet for Sikasil Primer and
contact Technical Service for additional information.
Application Ready to use,apply using professional caulking gun or dispensing equipment.Do not open product con-
tainer until preparation work has been completed.Apply sealant using consistent,positive pressure to force
sealant into the joint.Apply the sealant so that it is recessed 1/8 inch(3 mm)below the surface.For parking
deck joints,recess 1/4 inch(6 mm).For highway joints,recess 1/2 inch(13 mm).Sikasil-728 SL is self-
leveling therefore,no tooling is needed.Sikasil-728 SL will obtain adhesion to aged,cured asphalt.Never
use on newly poured asphalt.Conduct a field test to document and confirm adhesion under actual jobsite
conditions.
Limitations • Do not allow sealant to come in contact with solvent during cure.
• Do not allow sealant to come in contact with curing polyurethane sealants during cure.
• Not intended for immersion.
• Sealant may be applied below freezing temperatures if substrates are completely dry,frost free and
clean.Contact Technical Service for more information.
• Not intended for structural glazing.
• Test recommended for absorptive surfaces such as granite,limestone or marble where staining may
occur.
• Do not apply to surfaces that will be painted.
• Do not apply to substrates that bleed oil,plasticizers or solvent. •
■ Do not apply to damp or wet substrates.
• Lower temperature and humidity will extend tack free and cure rates.
• Allow treated wood to age six months before application.
• Brass and copper may be discolored.Test apply prior to application.
■ Test sensitive substrates,such as mirror backings for compatibility before use.
Caution WARNING:IRRITANT,SENSITIZER.Contains Methyl ethyl ketoxime(CAS:96-29-7),Oximino Silane
(Trade Secret),Mineral Spirits(CAS:8030-30-6).Direct eye contact may cause irritation.Eye contact may
cause conjunctivitis,corneal damage,or severe chemical burns. May cause skin irritation and sensitiza-
tion.May be absorbed through the skin. May cause irritation to respiratory system. May cause drowsi-
ness. Maybe harmful if swallowed.If heated,silicones can form formaldehyde vapors. Formaldehyde is a
potential cancer hazard,a known skin and respiratory sensitizer,and an irritant to the eyes,nose,throat,
skin,and digestive system. Product contains oximes,possible skin sensitizers.
Handling and Storage Use with adequate ventilation.Product evolves Methyl ethyl ketoxime(MEKO)and methanol when exposed
to water or humid air. Provide adequate ventilation to control MEKO within exposure guidelines. Keep
container closed and store away from water or moisture or oxidizing materials.
First Aid Remove to fresh air. Remove from skin and immediately flush with water for 15 minutes.Get medical
attention if irritation develops or ill effects persist. Treat according to person's condition and specifics of
exposure.
Clean Up Observe personal protective equipment recommendations described in MSDS. Disposal of collected prod-
uct,residues,and cleanup materials may be governmentally regulated.Observe all applicable local,state
and federal waste management regulations. Wipe up and contain for disposal.Final cleaning may require
use of steam,solvents,or detergents.
a
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KEEP CONTAINER TIGHTLY CLOSED•KEEP OUT OF REACH OF CHILDREN•NOT FOR INTERNAL CONSUMPTION•FOR INDUSTRIAL USE ONLY
All information provided by Sika Corporation(°Sika•)concerning Sika products,including but not limited to,any recommendations and advice relating to the
application and use of Sika products,is given in good faith based on Sika's current experience and knowledge of its products when properly stored,handled
and applied under normal conditions in accordance with Sika's instructions.In practice,the differences in materials,substrates,storage and handling condi-
tions,actual site conditions and other factors outside of Sika's control are such that Sika assumes no liability for the provision of such information,advice,
recommendations or instructions related to its products,nor shall any legal relationship be created by or arise from the provision of such information,advice,
recommendations or instructions related to its products.The user of the Sika product(s)must test the product(s)for suitability for the intended application
and purpose before proceeding with the full application of the product(s).Sika reserves the right to change the properties of its products without notice.
All sales of Sika product(s)are subject to its current terms and conditions of sale which are available at www.sikausa.conl or by calling 800-933-7452.
Prior to each use of any Sika product,the user must always read and foilowthe warnings and instructions on the product's most current Technical
Data Sheet,product label and Material Safety Data Sheet which are available online at www.sikausa.com or by calling Sika's Technical Service
Department at 800-933-7452. Nothing contained in any Sika materials relieves the user of the obligation to read and follow the warnings and
,
instruction for each Sika product as setforth in the current Technical Data Sheet,product label and Material Safety Data Sheet priorto product use.
„ LIMITED WARRANTY:Sika warrants this product for one year from date of installation to be free from manufacturing defects and to meet the •
technical properties on the current Technical Data Sheet if used as directed within shelf life.User determines suitability of product for intended
use and assumes all risks.Buyer's sole remedy shall be limited to the purchase price or replacement of product exclusive of labor or cost of labor.
NOOTHERWARRANTIESEXPRESSORIMPLIEDSHALLAPPLYINCLUDINGANYWARRANTYOFMERCHANTABILITYORFITNESSFORAPART1CULAR
PURPOSESIKASHALLNOTBELIABLEUNDERANYLEGALTHEORYFORSPECIALORCONSEQUENTIALDAMAGES:SIKASHALLNOTBERESPONSIBLE
FORTHEUSEOFTHISPRODUCTINAMANNERTOINFRINGEONANYPATENTORANYOTHERINTELLECTUALPROPERTYRIGHTSHELDBYOTHERS.
4
- 8� , Visit our website atwww.sikausa.com 1-800-933-SIKANATIONWIDE
R .A.egional Information and Sales Centers.For the location of your nearest Sika sales office,contact your regional center.
c s R Sika Corporation Sika Canada Inc. Sika Mexicana Sde C.V. asr.
201 Polito Avenue 601 Delmar Avenue Carretera Libre Celaya Km.8.5 4''?
Lyndhurst,NJ 07071 Pointe Claire Fracc.Industrial Balvanera 9
Phone:800-933-7452 Quebec H9R 4A9 Corregidora,Queretaro aeainiec a e
Fax:201-933-6225 Phone:514-697-2610 C.P.76920 .. ....C. ,•_
sou, 1.711111111111.-1.
Fax:514-694-2792 Phone:52 442 2385800 Sika and Sikasil are registered trademarks.
Fax:52 442 2250537 Printed in Canada.
4
f
r MATERIAL SAFETY DATA SHEET
ET
.„ _.,.
SIKASIL 728 SL SILICONE SEALANT
1—PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: SIKASIL 728 SL
PRODUCT CODE: SIL 728 SL
ADDRESS: Sika Corporation
201 Polito Avenue
Lyndhurst,New Jersey 07071
PHONE: (201)933-8800
FAX: (201)804-1076
EMERGENCY PHONE: (CHEMTREC)(800)424 9300 .
International(CHEMTREC)(703)527-3887
REVISION DATE: 11/03/1 SUPERSEDES: 12/03/08
2—COMPOSITION/INFORMATION ON HAZARDOUS INGREDIENTS
This product consists of a mixture/preparation.
CAS Number Ingredient Wt.%
96-29-7 Methyl ethyl ketoxime(MEKO) 1-5
Trade Secret Oximino Silane 2-7
8030-30-6 Mineral Spirits 1-2
*The above components are hazardous as defined in 29 CFR 1910.1200
3—HAZARDS IDENTIFICATION
MAIN SYMPTOMS:
EYE: Direct contact may cause mild irritation. Eye contact may cause conjunctivitis,corneal damage,or severe
chemical burns.
SKIN: May cause moderate irritation and possible dermal sensitization. May be absorbed through the skin.
INHALATION: Irritates respiratory passages very slightly. Vapor overexposure may cause drowsiness.
ORAL: Small amounts transferred to the mouth by fingers during use,etc.should not injure. Swallowing may injure.
COMMENTS If heated to temperatures above 150°C in the presence of air,silicones can form formaldehyde vapors.
Formaldehyde is a potential cancer hazard,a known skin and respiratory sensitizer,and an irritant to the eyes,
nose,throat,skin,and digestive system. Safe handling conditions may be maintained by keeping vapor
concentrations within the OSHA permissible exposure limit for formaldehyde.
Product evolves Methyl ethyl ketoxime(MEKO)when exposed to water or humid air. Provide adequate
ventilation to control MEKO within exposure guidelines or use respiratory protection—TWA:3ppm,STEL:
1 Oppm;AIHA WEEL TWA:1 Oppm.
Methyl alcohol forms on contact with water or humid air. Provide adequate ventilation to control exposures
within OSHA PEL guidelines—OSHA PEL:TWA 200ppm and ACGIH TLV-skin:TWA 200ppm,STEL 250ppm.
HMIS HAZARD CODES: Health:*1 Flammability:1 Reactivity:0 PPE: C
4—FIRST-AID PROCEDURES
INHALATION: Remove to fresh air. If ill effects persist,get medical attention.
SKIN CONTACT: Remove from skin and immediately flush with water for 15 minutes. Get medical attention if irritation develops
or ill effects persist.
EYE CONTACT: —Immediately-flush with water-for-15 minutes. Get medical attention.
INGESTION: Get medical attention.
COMMENTS: Treat according to person's condition and specifics of exposure.
Page 1 of 5
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MATERIAL SAFETY DATA SHEET
SIKASIL 728 SL SILICONE SEALANT
5—FIRE-FIGHTING MEASURES
SUITABLE EXTINGUISHING MEDIA: On large fires,use dry chemical,foam or water spray. On small fires,use carbon dioxide
(CO2),dry chemical or water spray. Water can be used to cool fire exposed containers.
FIRE-FIGHTING PROCEDURES: Self-contained breathing apparatus and protective clothing should be worn in fighting fires
involving chemicals. Determine the need to evacuate or isolate the area according to your
local emergency plan.
FLASH POINT(CLOSED CUP): Greater than 212F(100C)
HAZARDOUS DECOMPOSITION
PRODUCTS: Thermal breakdown of this product during fire or very high heat conditions may evolve the
following hazardous decomposition products: metal oxides,silicone dioxide,carbon oxides
and traces of incompletely burned carbon compounds,nitrogen oxides and formaldehyde.
6—ACCIDENTAL RELEASE MEASURES
PERSONAL PRECAUTIONS: Observe all personal protective equipment recommendations described in Sections 5 and 8.
ENVIRONMENTAL PRECAUTIONS: Disposal of collected product, residues, and cleanup materials may be
governmentally regulated. Observe all applicable local, state and Federal waste
management regulations.
METHODS FOR CLEANING UP: Wipe up or scrape up and contain for salvage or disposal.Final cleaning may require use of
steam,solvents,or detergents. See applicable regulatory compliance information in Section
15.
7—HANDLING AND STORAGE
HANDLING: Use with adequate ventilation. Product evolves Methyl ethyl ketoxime(MEKO)and methanol when exposed to
water or humid air. Provide adequate ventilation to control MEKO within exposure guidelines as described in
Section 3.
STORAGE: Keep container closed and store away from water or moisture or oxidizing materials.
8—EXPOSURE CONTROL AND PERSONAL PROTECTION
ENGINEERING CONTROLS:
LOCAL EXHAUST: Recommended
GENERAL VENTILATION: Recommended
PERSONAL PROTECTIVE EQUIPMENT:
EYE PROTECTION: Avoid eye contact. Use proper protection,safety glasses as a minimum.
SKIN AND BODY PROTECTION: Wash at mealtimes and end of shift. If skin contact occurs,change contaminated clothing
as soon as possible and thoroughly flush effected areas with cool water. Chemical
protective gloves are recommended.
RESPIRATORY PROTECTION: Use respiratory protection unless adequate local exhaust ventilation is provided or air
sampling data show exposures are within recommended exposure guidelines
HYGIENE MEASURES(INGESTION): Wash hands after handling and before eating. Do not eat,drink,or smoke when handling
product.
Precautionary measures: Avoid eye contact. Avoid skin contact. Avoid breathing vapor. Keep container closed. Do not take internally.
Note: These precautions are for room temperature handling. Use at elevated temperatures or aerosol spray
applications may require added precautions.
Page 2 of 5
MATERIAL SAFETY DATA SHEET
SIKASIL 728 SL SILICONE SEALANT
9-PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL FORM: Solid(Paste)
COLOR: Translucent
ODOR: Oxime
FLASHPOINT: >212F(100C)
EXPLOSION PROPERTIES: Not Determined
VAPOR PRESSURE(AT 100°F): Not Applicable
VAPOR DENSITY: Not Applicable
DENSITY: 10.6 lbs/gal
SOLUBILITY IN WATER(%): Less than 0.1
SPECIFIC GRAVITY(AT 77°F/25°C): 1.27
VOLATILE BY VOLUME: Less than 4%
VOLATILE.ORGANIC CONTENT(VOC): 2.27%by weight;29 g/I(0.25 lbs/gal)
NOTE: The above information is not intended for use in preparing product specifications.
10-STABILITY AND REACTIVITY
CHEMICAL STABILITY: Stable
HAZARDOUS POLYMERIZATION: Hazardous polymerization will not occur.
CONDITIONS TO AVOID: Store away from water or moisture.
MATERIALS TO AVOID: Oxidizing material can cause a reaction.
HAZARDOUS DECOMPOSITION
PRODUCTS: Thermal decomposition products as described in Section 5.
SECTION 11-TOXICOLOGICAL INFORMATION
CHRONIC TOXICITY:
SKIN: Product contains oximes,possible skin sensitizers.Product also contains small quantities of methanol,which is
a tissue irritant that may be absorbed through the skin and produce systemic toxic effects.
INHALATION: Vapor overexposure may cause drowsiness,injure blood,liver and may irritate eyes,nose and throat.
ORAL: Small amounts transferred to the mouth by fingers during use,etc.,should not injure.Swallowing large
amounts may injure slightly.
Note that chronic exposure to methanol(skin,inhalation,or oral)may damage the central nervous system,
optic nerve,kidneys,and liver,impair vision,and cause respiratory failure.
SPECIFIC EFFECTS: Methanol overexposure may cause reproductive effects.
SECTION 12-ECOLOGICAL INFORMATION
Complete information is not yet available.
Hazard Parameters(LC50 or EC50) High Medium Low
Acute Aquatic Toxicity(mg/I) <=1 >1 and<=100 >100
Acute Terrestrial Toxicity <=100 >100 and<=2000 >2000
"This table is adapted from"Environmental Toxicology and Risk Assessment",ASTM STP 1179,p.34,1993.
This table can be used to classify the ecotoxicity of this product when data becomes available. Please read the other information
presented in the section concerning the overall ecological safety of this material.
Page 3 of 5
rt ® ` ° MATERIAL SAFETY DATA SHEET
SIKASIL 728 SL SILICONE SEALANT
SECTION 13—DISPOSAL INFORMATION
PRODUCT DISPOSAL: RCRA Hazard Class(40 CFR 261)
When a decision is made to discard this material,as received,is it classified as a hazardous waste?NO.
State or local laws may impose additional regulatory requirements regarding disposal.
SECTION 14—TRANSPORT INFORMATION
DOT Information(49CFR 172.101)
PROPER SHIPPING NAME: Not Applicable
HAZARD CLASS: Not Applicable
UN/NA NUMBER: None
PACKING GROUP: Not Applicable
SECTION 15—REGULATORY INFORMATION
Contents of this MSDS comply with the OSHA Hazard Communication Standard 29 CFR 1910.1200.
US FEDERAL REGULATIONS:
TSCA Status:All chemical substances found in this product comply with the Toxic Substances Control Act inventory reporting
requirements.
EPA SARA Title III Chemical Listings: •
Section 302 Extremely Hazardous Substances/Section 304 CERCLA Hazardous Substances: None
Section 312 Hazard Class:
Acute: Yes
Chronic: Yes
Fire: No
Pressure: No
Reactive: No
Section 313
This product contains the following toxic chemicals subject to the reporting requirements of Section 313 of the Emergency Planning
and Community Right to Know Act:
No chemicals found in this product exceed their individual weight percent thresholds applicable to SARA Section 313 and therefore no
chemical in this product is subject to Section 313 reporting.
US STATE REGULATIONS:
This product does comply with the California Air Resources Board maximum for VOC's in a sealant.
States within the US that have promulgated State Right-to-Know regulations with chemical listing requirements including the chemicals
in this product are provided below.
Chemical CAS No. States
Dimethyl siloxane, hydroxyl terminated 70131-67-8 New Jersey,New York, Massachusetts, Pennsylvania
Calcium Carbonate 1317-65-3 Massachusetts, Minnesota, Pennsylvania,Washington
Trade Secret 2944800-5578
Trade Secret 2944800-5581
Trade Secret 2944800-5580
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° MATERIAL SAFETY DATA SHEET
SIKASIL 728 SL SILICONE SEALANT
INTERNATIONAL:
Canada
This product has been classified according to the hazard criteria of the CPR and the MSDS contains all the information required by the
CPR.
Canadian DSL
All ingredients in this product are currently listed on the Canadian Domestic Substances List(DSL)and would not be considered new
for the purposes of the Canadian Environmental Protection Act(CEPA).
Note:
The recipient of this product should be aware of the possible existence of additional local regulations,which may be applicable to this
product.
SECTION 16—OTHER INFORMATION
The information contained in this Material Safety Data Sheet applies only to the actual Sika Corporation("Sika")product identified and
described herein.This information is not intended to address, nor does it address the useor application of the identified Sika product in
combination with any other material,product or process.All of theinformation set forth herein is based on technical data regarding the
identified product that Sika believes to bereliable as of the date hereof. Prior to each use of any Sika product,the user must always read
and follow thewarnings and instructions on the product's current Technical Data Sheet, product label and Material Safety DataSheet for
each Sika product,which are available at web site and/or telephone number listed in Section 1 of thisMSDS.
SIKA MAKES NO WARRANTIES EXPRESS OR IMPLIED AND ASSUMES NO LIABILITY ARISING FROM THISINFORMATION OR
ITS USE. SIKA SHALL NOT BE LIABLE UNDER ANY LEGAL THEORY FOR SPECIAL ORCONSEQUENTIAL DAMAGES AND SHALL
NOT BE RESPONSIBLE FOR THE USE OF THIS PRODUCT IN AMANNER TO INFRINGE ON ANY PATENT OR ANY OTHER
INTELLECTUAL PROPERTY RIGHTS HELD BYOTHERS.
All sales of Sika products are subject to its current terms and conditions of sale available at www.sikacorp.com or201-933-8800.
Page 5 of 5
CONCRETE
11-ka
RESTORATION Spec Component:SC-174-12/10
SYSTEMS Sikasil-728 SL
DIVISION 7-THERMAL AND MOISTURE PROTECTION
Section 07900 Joint Sealers
Elastomeric and non-Elastomeric Sealant
Part 1 - General
1.01 Summary
A. This specification describes the sealing of highway/runway pavement joints with a one-component, low-
modulus,self-leveling,elastomeric silicone sealant.
1.02 Quality Assurance
A. Manufacturing qualifications:The manufacturer of the specified product shall be ISO 9001:2008 certified and
have in existence a recognized ongoing quality assurance program independently audited on a regular basis.
B. Contractor qualifications: Contractor shall be qualified in the field of concrete repair and protection with a
successful track record of 5 years or more. Contractor shall maintain qualified personnel who have receivced
product training by a manufacturer's representative.
C. Install materials in accordance with all safety and weather conditions required by manufacturer or as modified
by applicable rules and regulations of local,state and federal authorities having jurisdiction. Consult Material
Safety Data Sheets for complete handling recommendations.
1.03 Delivery,Storage,and Handling
A. All materials must be delivered in original,unopened containers with the manufacturer's name,labels,product
identification,and batch numbers. Damaged material must be removed from the site immediately.
B. Store all materials off the ground and protect from rain,freezing or excessive heat until ready for use.
C. Condition the specified product as recommended by the manufacturer.
1.04 Job Conditions
A. Environmental Conditions:Do not apply material if it is raining or snowing or if such conditions appear to be
imminent.Minimum application temperature 40°F(5°C)and rising.
B. Protection:Precautions should be taken to avoid damage to any surface near the work zone due to mixing and
handling of the specified sealant.
1.05 Submittals
A. Submit two copies of manufacturer's literature,to include:Product Data Sheets,and appropriate Material Safety
Data Sheets(MSDS).
1.06 Warranty
A. Provide a written warranty from the manufacturer against defects of materials for a period of one (1) year,
beginning with date of substantial completion of the project.
Part 2-Products
2.01 Manufacturers
A. Sikasil 728 SL,as manufactured by Sika Corporation,201 Polito Avenue,Lyndhurst,NJ 07071 is considered
to conform to the requirements of this specification.
2.02 Materials
A. Silicone sealant:
1. The joint sealant shall be a one-component, self-leveling,silicone-based material. It shall be applicable
in horizontal joints. The sealant shall principally cure under the influence of atmospheric moisture to
form an elastomeric substance.
B. Backer rod or bond breaker tape as approved by engineer.
2.03 Performance Criteria
A. Properties of the uncured Silicone sealant:
2. Initial Cure(Tack-Free Time)ASTM C-679: 110 minutes
3. Consistency:self-leveling
4. Color:Limestone&Gray
B. Properties of the cured silicone sealant:
1. Tensile Properties(ASTM D-412)at 21 days Self-Leveling
a. Tensile Strength at break:minimum 100 psi(0.69 Mpa)
b. Tensile Elongation:minimum 1200%
c.Modulus of Elasticity-
100%Elongation 30 psi(0.21 Mpa) min
2. Shore 00 Hardness(ASTM D-661)at 21 days:
a. Self-leveling:50+1-5
3. Peel Strength(ASTM C-794)
a. 25-pli 0%Adhesion Loss
4. Service Range: -80°F(-62°C)to 350°F(176°F)
5. Joint Movement(ASTM C-920): +100%/-50%
6. The sealant shall be non-staining.
7. Final Cure:7 to 10 days
Note:Tests were performed with material and curing conditions at 71°-75°F and 45-55%relative humidity.
Part 3-Execution
3.01 Surface Preparation
A. The joint and adjacent substrate must be clean,dry,sound and free of surface contaminants. Remove all traces
of the old sealant,dust, laitance, grease, oils,curing compounds, form release agents and foreign particles by
mechanical means, i.e. — sandblasting, etc., as approved by the Engineer. Blow joint free of dust using
compressed air line equipped with an oil trap.
3.02 Mixing and Application
A. Joints:
1. Install approved backer rod or bond breaker tape in all joints subject to thermal movement to
prevent three-sided bonding and to set the depth of the sealant at a maximum of 1/2 in.,measured
at the center point of the joint width. Approval of the backer rod or bond breaker tape shall be
made by the Engineer.
2. Joints shall be masked to prevent discoloration or application on unwanted areas,as directed by the
Engineer. If masking tape is used, it shall not be removed before tooling, yet must be removed
before the initial cure of the sealant.Do not apply the masking tape until just prior to the sealant
application.
3. Install sealant into prepared joints when the joint is at mid-point of its expansion and contraction
cycle.
Pour or extrude the sealant into the prepared joint in one direction and allow it to flow and level as
necessary. Avoid overlapping the sealant to eliminate the entrapment of air. Tool as required to
properly fill the joint.
4. Sealant must be recessed in the joint a minimum-of'/4 inch from the surface.
5. Adhere to all limitations and cautions for the polyurethane sealant in the manufacturer's printed
literature.
B. Cracks:
1. Pour or extrude the sealant into the prepared crack in one direction and allow it to flow and level
as necessary.Avoid overlapping the sealant to eliminate the entrapment of air. Tool as required to
properly fill the crack.
2. Selant must be recessed in the joint a minimum of inch from the surface.
3. Adhere to all limitations and cautions for the polyurethane sealant as stated in the manufacturers
printed literature.
3.03 Cleaning
A. The uncured silicone sealant can be cleaned with an approved solvent.The cured silicone sealant can only
be removed mechanically.
B. Leave work area in a neat,clean condition without evidence of spillovers onto adjacent areas.
SC-174 Sikasir-728 SL
Crack Filler
Figure 1 - Sika sil -728 SL(self-leveling)
1 . Pour or extrude Sikasil-728 SL into prepared
crack, allow to flow and level as necessary .
Sealant is to be recessed in the
crack a minimum 114" from the surface.
Minimum depth 1/4".
2. Tool as required to properly fill crack .
to*
a
Concrete Restoration Systems by Sika Corporation,201 Polito Avenue,Lyndhurst,NJ 07071
SCA-174 Sikasil® -728 SL
Expansion Joint Filler
Figure 1 - Sikasil-728 SL(self-leveling)
1. Pour or extrude Sikasil-728 SL into
prepared joint, allow to flow and level as
necessary. Sealont is to be recessed in
the joint a minimum of 1/4" from the
surface. Minimum depth 1/4".
2. Appy, sealant by bulk caulking
gun, industrial pumping or other
acceptable method.
SI* Sealant
0
Backer rod
v �
Concrete Restoration Systems by Sika Corporation,201 Polito Avenue,Lyndhurst,NJ 07071
The preceding specifications are provided by Sika Corporation as a guide for informational purposes only and are not
intended to replace sound engineering practice and judgment and should not be relied upon for that purpose. SIKA
CORPORATION MAKES NO WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,AS TO THE
ACCURACY, COMPLETENESS OR THE CONTENTS OF THESE GUIDE SPECIFICATIONS. Sika Corporation
assumes no liability with respect to the provision or use of these guide specifications, nor shall any legal relationship
be created by, or arise from,the provision of such specifications SIKA SHALL NOT BE RESPONSIBLE UNDER
ANY LEGAL THEORY TO ANY THIRD PARTY FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES OF ANY
KIND ARISING FROM THE USE OF THESE GUIDE SPECIFICATIONS. The specifier, architect, engineer or design
professional or contractor for a particular project bears the sole responsibility for the preparation and approval of the
specifications and determining their suitability for a particular project or application.
Prior to each use of any Sika product, the user must always read and follow the warnings and instructions on the
product's most current Technical Data Sheet, product label and Material Safety Data Sheet which are available at
www.sikaconstruction.com or by calling (201) 933-7452. Nothing contained in any Sika materials relieves the user of
the obligation to read and follow the warnings and instructions for each Sika product as set forth in the current
Technical Data Sheet, product label and Material Safety Data Sheet prior to product use.