Sikaflex 1A

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Sikaflex 1A

One part polyurethane, elastomeric sealant/adhesive

Available in:

  • White – #431-241
  • Gray – #431-242


Sikaflex-1a  is a premium-grade, high-performance, moisture-cured, 1-component, polyurethane-based, nonsag elastomeric sealant. Meets Federal specification TT-S-00230C, Type II, Class A. Meets ASTM C-920, Type S, Grade NS, Class 25, use T, NT, O, M, G, I; Canadian standard CAN/CGSB 19.13-M87.

Where to Use:

  • Designed for all types of joints where maximum depth of sealant will not exceed ½ in.
  • Excellent for small joints and fillets, windows, door frames, reglets, flashing, 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 expansion.
  • Submerged conditions, such as canal and reservoir joints.
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