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Three tubes of Tremfex 25FC sealant on a white background
  • Three tubes of Tremfex 25FC sealant on a white background
TREMflex 25FC Polyurethane Joint Sealant – Fast Cure 600ml Sausage
$19.95 $11.99 Inc. GST

TREMflex 25FC is a professional-grade, fast-curing polyurethane sealant designed for waterproofing fillet joints and movement joints. With ±25% movement capability, superior adhesion, and extreme weather resistance, it’s the ideal choice for demanding construction and waterproofing applications.

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Key Features

  • Elongation: >600%
  • Tensile Strength: 1.8 MPa
  • Shore A Hardness: 45
  • Tack Free Time: 45–75 minutes
  • Sagging: 0mm (non-sag formula)

Typical Uses

  • Waterproofing systems (internal & external)
  • Fillet joints (wall-to-wall + wall-to-floor)
  • Expansion & movement joints
  • Bathrooms
  • balconies & wet areas
  • Commercial & residential construction

Suitable Surfaces

  • Concrete
  • Masonry
  • Metal (prepared)
  • Timber
  • Most common construction substrates
  • ⚠️ Not suitable for glass - EPDM - PVC - TPO or continuous water immersion (e.g. pools).

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Product Details

Professional Waterproofing Sealant Built to Perform

TREMflex 25FC is a one-component polyurethane joint sealant engineered for high-performance waterproofing systems. Designed for fillet joints and movement joints, it delivers exceptional flexibility, adhesion, and durability in even the harshest environments.

Whether you're working on internal wet areas or external waterproofing systems, this sealant ensures long-lasting protection against water ingress, movement stress, and environmental exposure.

Why Professionals Choose TREMflex 25FC

  • Handles ±25% joint movement without cracking
  • Bonds strongly to a wide range of substrates
  • Performs in extreme temperatures (-40°C to +80°C)
  • Resistant to UV, weathering, seawater & mild chemicals
  • Smooth, non-sag application for vertical & horizontal joints
  • Fast curing – over 3mm per day

Product Limitations

  • Not suitable for swimming pools or constant immersion
  • May discolour on bitumen surfaces
  • Some substrates may require primer