Sika Sikaflex-1a 300mL One-Component Elastomeric Polyurethane Sealant

Item No. 27612
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Sika Sikaflex-1a 300mL One-Component Elastomeric Polyurethane Sealant is a premium-grade, high performance, moisture-cured, one-component, polyurethane based, non-sag elastomeric sealant. It is designed for all types of joints with a maximum depth of 13mm (1/2") and a maximum expansion of 35%. It is suitable for both vertical and horizontal joints as well as submerged conditions.


  • Eliminates time, effort, and equipment for mixing, filling cartridges, pre-heating or thawing, and cleaning of equipment
  • Fast tack-free and final cure times
  • High elasticity - cures to a tough, durable, flexible consistency with exceptional cut and tear-resistance
  • Stress relaxation
  • Excellent adhesion - bonds to most construction materials without a primer
  • Excellent resistance to aging, weathering
  • Odourless, non-staining
  • 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


  • Designed for all types of joints where maximum depth of sealant will not exceed 1/2"
  • Excellent for small joints and fillets, windows, door frames, reglets, flashing, common roofing detail applications, 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


Product TypePolyurethane
Temperature Range-40 to 170°F (-40 to 78°C)
ColorAluminum Grey
Container Size300 ml