Liquid Rubber Instant Set Waterproofing System Liquid Rubber Liquid Rubber Instant Set Liquid rubber roofing system

Instant Set Waterproofing System

Liquid Rubber is a unique roofing system, specifically formulated for use in the new roof and roof refurbishment sectors.  With outstanding adhesion properties and a completely eco-friendly composition, Liquid Rubber is a safe alternative to traditional roofing systems and single-plies alike.  Liquid Rubber Instant Set is spray applied onto the surface and instantly sets on contact, making it showerproof almost immediately.


Liquid Rubber Features

Liquid Rubber is a cold, spray applied, elastomeric membrane system, that can be applied at a rate of up to 1,000m2 per day.  Due to its unique formulation, it can be applied to a variety of different surfaces, providing outstanding protection and highly anti-corrosive properties.  Liquid Rubber eliminates the need for stripping old material, providing an ideal over-coating for most substrates including asbestos.

Liquid Rubber provides a fully bonded, seamless membrane.

Over 1,000% elasticity and 95% memory.

Completely non-toxic, eco-friendly and solvent & VOC free.

Suitable for:

  • Concrete and stone;
  • Corrugated asbestos;
  • Metal and plastisol;
  • Insulation boards;
  • Timber;
  • Felt and asphalt;
  • Single-ply membranes, including EPDM;
  • And Glass-Reinforced Plastic (GRP).
Chemical resistance: Resistant to atmospheric, chemical aerosols, or acid rain. Limited resistance to gasoline, diesel fuel and other petroleum products.
Biological resistance ASTM E154, ASTM D412: Passed
Impact resistance CSB37-GP-56 @ 23°C (j): >19
Water tightness after impact:

Passed (no leakage)

Specific gravity g/cm³: Approx. 1.0
Tensile strength ASTM D412 (p.s.i): >22
Adhesion to concrete strength ASTM C907: (amended to tensile adhesion (p.s.i)) >50
Law temperature mandrel @ -25°C Passed
Crack bridging ASTM C836, un-aged -20°C Passed (70 cycles)
Crack bridging ASTM C836, aged E20°C Passed (10 cycles)
Puncture resistance CGSB 37-GP-56: (24 hours @ 29N @ -5°C) Passed (no perforations)
Water vapour transmission ASTM E96, ng/Pa.sm² >6.6
Water absorption CGSB37 – GP-56M, %inc >2
Accelerated weathering ASTM G155: D412 tensile strength: Passed
Hardness (durometer type 00) 78-80
Canadian Construction Materials Centre Approved (13175)
Colour Black


Form: Liquid
Colour: Brown
PH: 7-13
Specific Gravity: 1.00 (approx)
Vapour Pressure: (mm Hg) 17 @ 20°C (water)
Vapour Density: 20°C (water) >1 (air=1)
Evaporation Rate: <1 (nBuAcetate=1)
Boiling Point: 100°C (water)