Everbuild Everflex 145 butyl rubber sealant - 310ml C3 - Grey

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Everbuild 145 Butyl Sealant is a traditional one component sealant based on polybutene that provides an effective weatherproof seal in a variety of exterior and interior applications.

It forms a skin in 24 hours but remains permanently plastic underneath. The sealant accommodates joint movement of ± 5%, is overpaintable and exhibits good UV and chemical resistance.

  • Overpaintable
  • Adheres to most common building surfaces
  • Semi drying – forms a surface skin but remains permanently elastic beneath
  • High solids formulation - excellent gap filling properties without shrinkage
  • Good external weathering properties


  • Single glazing of metal, concrete and wooden frames
  • Sealing metal roof panels
  • Pointing around soft and hardwood timber, metal and concrete/stone window and door frames
  • Sealing metal panels in car bodies and containers
  • Sealing pre-cast concrete panels
  • Sealing timber sections to brick, stone and concrete; ideal for roofline applications
  • Sealing gaps and cracks in brickwork and stone

Product details

Form Ready to use thixotropic paste
Specific gravity 1.5 - 1.6 approx.
Movement accommodation  +/- 5%
Slump resistance No slump to ISO 7390
  +4°C to +40°C
Movement accommodation Low to medium (+/- 5%)

Product Specification

Application Temperature 5°C to 35°C
Brand Everbuild
Cleaning White spirits
Colour Grey
Coverage 11 linear metres per cartridge using a 6mm bead approx.
Curing method Skins within 24hrs remains elastic underneath
Product Type Special Adhesive
Service Temperature -15°C to +75°C
Shelf life 12 months from date of manufacture when stored in original unopened containers
Size 310ml
Viscosity 150-350,000cps

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