Sikaflex -291

1 Technical Data Sheet Version 5 / 06 / 2005. Sikaflex -291. Fast Cure Marine Adhesive and Sealant Technical Product Data (typical values). Chemical base 1-C polyurethane White, black, aluminum gray, Color colonial white Cure mechanism Humidity-curing Density (uncured) lb/gal depending on color VOC (EPA method 24) lb/gal Non-sag properties Good Application temperature product 40 F - 105 F (5 C - 40 C). Tack free time1 60 min Open time1 45 min Curing speed (see diagram 1). Shrinkage 5%. Shore A-hardness (ASTM D 2240) 40. Tensile strength (ASTM D 412) 260 psi Elongation at break (ASTM D 412) 500%. Tear propagation resistance (ASTM D 624) 34 pli Glass transition temperature -50 F (-45 C. Movement accommodation factor 12,5%. Service temperature permanent -40 - 195 F (-40 C -+90 C). Short term 1 day 250 F (120 C). 1hour 285 F (140 C). Shelf life (storage below 80 F (25 C)) 12 months 1). 73 F (23 C) / 50% Description Product Benefits Areas of Application Sikaflex -291 is a 1-component, - Use above and below water line - General all-purpose sealant marine grade polyurethane - Resists salt water - May be used for light duty.

2 - Fast strength build-up elastomeric adhesive and sealant. - Excellent adhesion to gelcoat, bonding Used by many boat builders, its fast fiberglass, metal and wood cure time makes it ideal for - May be squeezed or brushed into applications where speed is - place - Stable important. Sikaflex -291 is - Paintable manufactured in accordance with - Versatile packaging ISO 9001 / 14001 quality assurance - Excellent bond system and the responsible care - Fast tack-free time - High solids content program. - Sandable - NSF approved for potable water (black and white only). - USDA approved for incidental food contact. Sikaflex -291 1 / 3. Cure Mechanism Application should not be exposed to baking Sikaflex -291 cures by reaction with Recommended application temperatures until it has attained full atmospheric moisture. At low temperatures: 40oF to 110oF. For cure. It should be understood that temperatures the water content of cold-weather application, store units the hardness and film thickness of the air is generally lower and the at approximately 70oF; remove just the paint may impair the elasticity of curing reaction proceeds somewhat prior to using.

3 Make sure joint is the sealant and lead to cracking of slower (see diagram). frost free. Cut tip of plastic nozzle to the paint film with time. joint size. Puncture air tight seal. 12 Install with hand or power operated Limitations Thickness of cure (mm). 23 C / 50% caulking gun. For best . - Do not apply on frozen surface or performance, Sikaflex -291 should through standing water. 8 be gunned into joint when joint slot - Do not apply over silicones or in is mid-point of its designed the presence of curing silicones. 10 C / 50% expansion and contraction. To 4 - Avoid contact with alcohol and facilitate tooling, wet pointing tool or alcohol containing solvents during finger with soap solution. For advice cure. 0 on selecting and setting up a - Allow minimum of 1 week full cure 0 2 4 6 10 suitable pump system please con- prior to total water immersion Time (days) tact the System Engineering De- situations.

4 Diagram 1: Curing speed Sikaflex -291 partment of Sika Industry at 888- - Maximum chlorine exposure 832-7452. ppm. Chemical Resistance - Do not use as a deck seam . Sikaflex -291 is resistant to fresh sealant. water, seawater, limewater, sewage 2h effluent, diluted acids and caustic h CAUTION: IRRITANT. solutions; temporarily resistant to Irritant;Sensitizer:Contains fuels, mineral oils, vegetable and b b Polyisocyanate pre- polymer, animal fats and oils; not resistant to xylene. May cause organic acids, alcohol, concentrated Figure 1: Recommended bead skin/eye/respiratory irritation. May configuration mineral acids and caustic solutions cause skin and/or respiratory - or solvents. Tooling and finishing sensitization after prolonged or - The above information is offered for Tooling and finishing must be repeated contact. Avoid contact. general guidance only. Advice on carried out within the tack free time Xylene may cause headaches, - specific applications will be given on of the sealant.

5 We recommend the dizziness or other CNS effects; and request. Contact the Technical use of Sika -Slick Cutout Lubricant may cause liver or kidney effects. Service Department of Sika Industry and Tooling Agent. Other finishing Use only with adequate ventilation. at 888-832-7452. agents or lubricants must be tested Use of safety goggles and chemical for suitability/compatibility. resistant gloves is recommended. Method of Application In case of exceedance of PELs, use Surface preparation Removal an appropriate, properly fitted Clean, dry, free of oil and grease, Uncured Sikaflex -291 may be NIOSH/MSHA approved respirator. and of sound quality. Thoroughly removed from tools and equipment Remove contaminated clothing. remove all loose particles such as with mineral spirit or an other residues of color, splashes, etc. suitable solvent. Once cured, the HMIS. Clean surface with a strong jet of material can only be removed Health *2.

6 Compressed air, sandblast, solvent. mechanically. Pretest substrates for adhesion. Hands and exposed skin should be Flammability 1. Cleaners and/or primers may be washed immediately using a suit- Reactivity 0. required to achieve optimal able industrial hand cleanser and Personal Protection C. adhesion. Please refer to the water. Do not use solvents! Surface Preparation Guidelines for Overpainting First Aid Measures specific application information. Advice on specific applications is Sikaflex -291 can be overpainted In case of skin contact, wash - available from the Technical Service when tack-free. The paint and paint immediately and thoroughly with Department of Sika Industry. process must be tested for soap and water. If symptoms - compatibility by carrying out persist, consult physician. For eye preliminary trials. Sikaflex -291 contact, flush immediately with Further information available at: SikaFax: 877-663-9727.

7 Sikaflex -291 2 / 3. Sika Corporation Industry Division 30800 Stephenson Highway Madison Heights, MI 48071. USA. Tel. 248 577 0020. Fax 248 577 0810. plenty of water for at least 15 - Clean Up minutes, contact a physician. For Uncured sealant may be removed respiratory problems, remove - with solvent. Cured sealant is only person to fresh air; if symptoms removed mechanically. In case of persist, contact a physician. In case spills or leaks, wear suitable - of ingestion, dilute with water and protective equipment, contain spill, consult physician. Remove collect with absorbent material and contaminated clothing. transfer to suitable container. - Ventilate area. Avoid contact. - Further Information Dispose of in accordance with Copies of the following publications current, applicable local, state, and are available on our homepage or federal regulations. through SikaFax: - Material Safety Data Sheets LIMITED WARRANTY.

8 - Sika Primer Chart Sika warrants this product for one - General guidelines for bonding year from date of installation to be and sealing with Sikaflex free from manufacturing defects and products to meet the technical properties on In case of emergency call: the current Technical Data Sheet if Chemtrec: 800-424-9300 used as directed within shelf life. International: 703-527-3887 User determines suitability of pro- duct for intended use and assumes Important all risks. Buyer's sole remedy shall For information and advice regar- be limited to the purchase price or ding transportation, handling, sto- replacement of product exclusive of rage and disposal of chemical labor or cost of labor. products, users should refer to the NO OTHER WARRANTIES IM- actual Material Safety Data Sheets PLIED OR EXPRESS SHALL. containing physical, ecological, toxi- APPLY INCLUDING ANY WAR- cological and other safety-related RANTY OF MERCHANTABILITY.

9 Data. It is highly recommended to OR FITNESS FOR A PARTICULAR. read the actual Material safety data PURPOSE. SIKA SHALL NOT BE. sheet before using the product. LIABLE UNDER ANY LEGAL THE- - Keep out of reach of children ORY FOR SPECIAL OR CONSE- - For industrial use only QUENTIAL DAMAGES. SIKA. - Not for internal consumption SHALL NOT BE RESPONSIBLE. - Keep container tightly closed FOR THE USE OF THIS PRODUCT. IN A MANNER TO INFRINGE OR. Packaging Information ANY PATENT OR ANY OTHER. INTELLECTUAL PROPERTY. Cartridge fl. oz. RIGHTS HELD BY OTHERS. Unipac 20 fl. oz. Pail gal Drums 50 gal Handling and Storage Sikaflex -291 should not be stored at temperatures in excess of 77oF. Properly stored in cool, dry conditions, the unopened cartridges and unipacs have a shelf life of 12. months and unopened pails and drums have a shelf life of 6 months. Further information available at: SikaFax: 877-663-9727.

10 Sikaflex -291 3 / 3. Sika Corporation Industry Division 30800 Stephenson Highway Madison Heights, MI 48071. USA. Tel. 248 577 0020. Fax 248 577 0810.