Sikaflex -291 - The AdvanTec Store

Product Data SheetVersion 5/7/2010Sikaflex ® -291Fast Cure Marine Adhesive and SealantTechnical Product Data (typical values)Chemical baseColorCure mechanism1-C polyurethaneWhite, black, colonial whiteHumidity-curingDensity (uncured)10.8 lb/galdepending on colorVOC (EPA method 24)0.43 lb/gal (51.5 g/l)Non-sag propertiesGoodApplication temperature product 41°F - 104°F (5°C - 40°C)Tack free time 160 minOpen time 145 minCuring speed (see diagram 1)Shrinkage 5%Shore A-hardness (ASTM D 2240) 40Tensile strength (ASTM D 412)260 psiElongation at break (ASTM D 412) 500%Tear propagation resistance (ASTM D 624)34 pliGlass transition temperature-49°F (-45°C)Movement accommodation factor 12.5%Service temperatureShort termShelf life (storage below 77°F (25°C))1)73°F (23°C) / 50% r.h.permanent1 day1hour-40° - 194°F (-40° C -+90°C)248°F (120°C)284°F (140°C)12 months cartridge/unipacDescriptionSikaflex ® -291 is a 1-component,marine grade polyurethaneelastomeric adhesive and sealant.Used by many boat builders, its fastcure time makes it ideal forapplications where speed isimportant. Sikaflex ® -291 ismanufactured in accordance withISO 9001 / 14001 quality assurancesystem and the responsible careprogram.Product Benefits- Use above and below water line- Resists salt water- Fast strength build-up- Excellent adhesion to gelcoat,fiberglass, metal and wood- May be squeezed or brushed intoplace- Stable- Paintable- Versatile packaging- Excellent bond- Fast tack-free time- High solids content- Sandable- NSF approved for potable water(black and white only)- USDA approved for incidental foodcontact.Areas of Application- General all-purpose sealant- May be used for light duty bondingThis product is suitable forexperienced professional usersonly. Tests with actual substratesand conditions have to beperformed to ensure adhesion andmaterial compatibility.Sikaflex ® -291 1 / 3

Cure MechanismSikaflex ® -291 cures by reaction withatmospheric moisture. At lowtemperatures the water content ofthe air is generally lower and thecuring reaction proceeds somewhatslower (see diagram).Thickness of cure (mm)128423°C / 50% r.h10°C / 50% r.h00 2 4 6Time (days)10Diagram 1: Curing speed Sikaflex ® -291Chemical ResistanceSikaflex ® -291 is resistant to freshwater, seawater, limewater, sewageeffluent, diluted acids and causticsolutions; temporarily resistant tofuels, mineral oils, vegetable andanimal fats and oils; not resistant toorganic acids, alcohol, concentratedmineral acids and caustic solutionsor solvents.The above information is offered forgeneral guidance only. Advice onspecific applications will be given onrequest. Contact the TechnicalService Department of Sika Industryat 888-832-7452.Method of ApplicationSurface preparationSurfaces must be clean, dry, free ofoil and grease, and of sound quality.Thoroughly remove all looseparticles such as residues of color,splashes, etc. Clean surface with astrong jet of compressed air,sandblast, solvent.Pretest substrates for adhesion.Cleaners and/or primers may berequired to achieve optimaladhesion. Please refer to theSurface Preparation Guidelines forspecific application information.Advice on specific applications isavailable from the Technical ServiceDepartment of Sika Industry.ApplicationRecommended applicationtemperatures: 41 o F-104 o F (5-40C).For cold-weather application, storeunits at approximately 70 o F; removejust prior to using. Make sure joint isfrost free. Cut tip of plastic nozzle tojoint size. Puncture air tight seal.Install with hand or power operatedcaulking gun. For bestperformance, Sikaflex ® -291 shouldbe gunned into joint when joint slotis mid-point of its designedexpansion and contraction. Tofacilitate tooling, wet pointing tool orfinger with soap solution. For adviceon selecting and setting up asuitable pump system please contactthe System Engineering Departmentof Sika Industry at 888-832-7452.2hFigure 1:bRecommended beadconfigurationTooling and finishingTooling and finishing must becarried out within the tack free timeof the sealant. We recommend theuse of Sika ® -Slick Cutout Lubricantand Tooling Agent. Other finishingagents or lubricants must be testedfor suitability/compatibility.RemovalUncured Sikaflex ® -291 may beremoved from tools and equipmentwith mineral spirit or an othersuitable solvent. Once cured, thematerial can only be removedmechanically. Hands and exposedskin should be washed immediatelyusing a suitable industrial handcleanser and water. Do not usesolvents on hands!OverpaintingSikaflex ® -291 can be overpaintedwhen tack-free. The paint and paintprocess must be tested forcompatibility by carrying outpreliminary trials. Sikaflex ® -291bhshould not be exposed to bakingtemperatures until it has attained fullcure. It should be understood thatthe hardness and film thickness ofthe paint may impair the elasticity ofthe sealant and lead to cracking ofthe paint film with time.Limitations- Do not apply on frozen surface orthrough standing water.- Do not apply over silicones or inthe presence of curing silicones.- Avoid contact with alcohol andalcohol containing solvents duringcure.- Allow minimum of 1 week full cureprior to total water immersionsituations.- Maximum chlorine exposure 2.5ppm.- Do not use as a deck seamsealant.CAUTION: IRRITANT.Irritant;Sensitizer:ContainsPolyisocyanate pre- polymer,xylene. May cause skin / eye /respiratory irritation. May causeskin and/or respiratory sensitizationafter prolonged or repeated contact.Avoid contact. Xylene may causeheadaches, dizziness or other CNSeffects; and may cause liver orkidney effects. Use only withadequate ventilation. Use of safetygoggles and chemical resistantgloves is recommended. In case ofexceedance of PELs, use anappropriate, properly fittedNIOSH/MSHA approved respirator.Remove contaminated clothing.Certified to the NSF/ANSIStandard 61 for potable water.HMISHealth *2Flammability 1Reactivity 0Personal ProtectionCFurther information available at:www.sikaindustry.comSika CorporationIndustry Division30800 Stephenson HighwayMadison Heights, MI 48071USATel. 248 577 0020Fax 248 577 0810Sikaflex ® -291 2 / 4

First Aid MeasuresIn case of skin contact, washimmediately and thoroughly withsoap and water. If symptomspersist, consult physician. For eyecontact, flush immediately withplenty of water for at least 15minutes, contact a physician. Forrespiratory problems, removeperson to fresh air; if symptomspersist, contact a physician. In caseof ingestion, dilute with water andconsult physician. Removecontaminated clothing.Further InformationCopies of the following publicationsare available on our websitewww.sikaindustry.com:-Material Safety Data Sheets-Product Data Sheet-Sika Primer Chart-General guidelines for bonding andsealing with Sika productsIn case of emergency call:Chemtrec: 800-424-9300International: 703-527-3887For further information and adviceregarding transportation, handling,storage and disposal of chemicalproducts, users should refer to theactual Material Safety Data Sheetscontaining physical, ecological,toxicological and other safety relateddata. It is highly recommended toread the actual Material Safety DataSheet before using the product.-KEEP OUT OF REACH OF CHILDREN-NOT FOR INTERNAL CONSUMPTION-FOR INDUSTRIAL USE ONLY-KEEP CONTAINER TIGHTLY CLOSEDPackaging InformationCartridgeUnipacPailDrums300 ml600 ml4.5 gal50 galValue BasisAll technical data stated in thisProduct Data Sheet are based onlaboratory tests only. Actualmeasured data in the field may varydue to site specific conditions whichare not known to Sika and beyondour control.Handling and StorageSikaflex ® -291 should not be storedat temperatures in excess of 77 o F.Properly stored in cool, dryconditions, the unopened cartridgesand unipacs have a shelf life of 12months and unopened pails anddrums have a shelf life of 6 months.Clean UpUncured sealant may be removedwith solvent. Cured sealant is onlyremoved mechanically. In case ofspills or leaks, wear suitableprotective equipment, contain spill,collect with absorbent material andtransfer to suitable container.Ventilate area. Avoid contact.Dispose of in accordance withcurrent, applicable local, state, andfederal regulations.Limited Material WarrantySIKA warrants this product for oneyear from date of installation to befree from manufacturing defects andto meet the technical properties onthe current Product Data Sheet ifused as directed within shelf life.User determines suitability ofproduct for intended use andassumes all risks. Buyer’s soleremedy shall be limited to thepurchase price or replacement ofproduct exclusive of labor or cost oflabor. NO OTHER WARRANTIESIMPLIED OR EXPRESS SHALLAPPLY INCLUDING ANYWARRANTYOFMERCHANTABILITY OR FITNESSFOR A PARTICULAR PURPOSE.SIKA SHALL NOT BE LIABLEUNDER ANY LEGAL THEORYFOR SPECIAL ORCONSEQUENTIAL DAMAGES.SIKA SHALL NOT BERESPONSIBLE FOR THE USE OFTHIS PRODUCT IN A MANNER TOINFRINGE ON ANY PATENT ORANY OTHER INTELLECTUALPROPERTY RIGHTS HELD BYOTHERS.Legal Notes/DisclaimerAll information provided by SikaCorporation (“Sika”) concerning Sikaproducts, including but not limited to,any recommendations and advicerelating to the application and use ofSika products, is given in good faithbased on Sika’s current experienceand knowledge of its products whenproperly stored, handled and appliedunder normal conditions inaccordance with Sika’s instructions.In practice, the differences inmaterials, substrates, storage andhandling conditions, actual siteconditions and other factors outsideof Sika’s control are such that Sikaassumes no liability for the provisionof such information, advice,recommendations or instructionsrelated to its products, nor shall anylegal relationship be created by orarise from the provision of suchinformation,advice,recommendations or instructionsrelated to its products. The user ofthe Sika product(s) must test theproduct(s) for suitability for theintended application and purposebefore proceeding with the fullapplication of the product(s).Sika reserves the right to changethe properties of its products withoutnotice. All sales of Sika product(s)are subject to its current terms andconditions of sale which areavailable at www.sikacorp.com or bycalling 201-933-8800.Prior to each use of any Sikaproduct, the user must always readand follow the warnings andinstructions on the product’s mostcurrent Product Data Sheet, productlabel and Material Safety DataSheet which are available atwww.sikaindustry.com. Nothingcontained in any Sika materialsrelieves the user of the obligation toread and follow the warnings andinstruction for each Sika product asset forth in the current Product DataSheet, product label and MaterialFurther information available at:www.sikaindustry.comSika CorporationIndustry Division30800 Stephenson HighwayMadison Heights, MI 48071USATel. 248 577 0020Fax 248 577 0810Sikaflex ® -291 3 / 4

Safety Data Sheet prior to productuse.Further information available at:www.sikaindustry.comSika CorporationIndustry Division30800 Stephenson HighwayMadison Heights, MI 48071USATel. 248 577 0020Fax 248 577 0810Sikaflex ® -291 4 / 4