Sikaflex 2cSL is a 2-component, premium-grade, polyurethane-based, elastomeric sealant. It is principally a chemical cure in a self-leveling consistency. ASTM C-920, Type M, Grade P, Class 25, use T, NT, M, G, A, O, I. Federal Specification TT-S-00227E, Type 1, Class A. Anything we can help with? Contact us
Recommended application temperatures 40–100 °F. Pre-conditioning units to 65–75 °F is necessary when working at extremes. Move pre-conditioned units to work areas just prior to application. Apply sealant only to clean, sound, dry, and frost-free substrates. Sikaflex 2CSL should be applied into joints when joint slot is at mid-point of its designed expansion and contraction. To place, pour or extrude the SL grade in one direction and allow it to flow and level as necessary. If extruding, load mixed sealant directly into bulk gun or use follower plate loading system. Place nozzle of gun into bottom of joint and fill entire joint. Keeping the nozzle deep in the sealant, continue with a steady flow of sealant preceding nozzle to avoid air entrapment. Also, avoid overlapping of sealant since this also entraps air. Tooling and Finishing Tool as necessary. Joint dimension should allow for 1/4 inch minimum and 1/2 inch maximum thickness for sealant. Proper design is 2:1 width to depth ratio. Removal Uncured material can be removed with an approved solvent. Strictly follow solvent manufacturer’s warnings and instructions for use. Cured material can only be removed mechanically. For spillage, collect, absorb, and dispose of in accordance with current, applicable local, state, and federal regulations. The ultimate performance of Sikaflex-2c, depends on good joint design and proper application. Minimum depth in working joint is 1/4 in. Maximum expansion and contraction should not exceed 50 % of average joint width. Do not cure in the presence of curing silicones. Avoid contact with alcohol and other solvent cleaners during cure. Allow 3 day cure before subjecting sealant to total water immersion. Primer is required if sealant will be subjected to total water immersion. Avoid exposure to high levels of chlorine. (Maximum level is 5 ppm). Do not apply when moisture vapor transmission exists since this can cause bubbling within the sealant. Avoid over-mixing sealant. White color tends to yellow slightly when exposed to ultraviolet rays. Light colors can yellow if exposed to direct gas fired heating elements. When overcoating: an on-site test is recommended to determine actual compatibility. Rigid paints, coatings or primers will crack when placed over elastomeric sealants experiencing expansion or contraction.