Sikaflex-1a is a premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, non-sag
elastomeric sealant. Meets Federal specification TT-S-00230C, Type II, Class A. Meets ASTM C-920, Type
S, Grade NS, Class 35, use T, NT, O, M, G, I; Canadian standard CAN/CGSB 19.13-M87.
Designed for all types of joints where maximum depth of sealant will not exceed 1/2 in.
Excellent for small joints and fillets, windows, door frames, reglets, flashing, common roofing detail ap-
plications, and many construction adhesive applications.
Suitable for vertical and horizontal joints; readily placeable at 40°F.
Has many applications as an elastic adhesive between materials with dissimilar coefficients of expan-
Submerged conditions, such as canal and reservoir joints.
Eliminates time, effort, and equipment for mixing, filling cartridges, pre-heating or thawing, and cleaning
Fast tack-free and final cure times.
High elasticity - cures to a tough, durable, flexible consistency with exceptional cut and tear-resistance.
Excellent adhesion - bonds to most construction materials without a primer.
Excellent resistance to aging, weathering.
Proven in tough climates around the world.
Jet fuel resistant.
Certified to the NSF/ANSI Standard 61 for potable water.
Urethane-based; suggested by EPA for radon reduction.
Paintable with water-, oil- and rubber-based paints.
Capable of ±35% joint movement.