ACCEPTABLE APPLICATIONS

Metal - coated or galvanized steel, weathered aluminum
EPDM rubber membrane
Concrete (except foot traffic surfaces)
Urethane foam
Primed wood
Fiberglass
PVC sheet and pipe
Acrylic sheet
Sponge rubber insulation
EPDM rubber membrane on flat or sloped roofs
Weathered steel siding
Weathered fiberglass
Weathered standing seam and corrugated metal roofs
Weathered vinyl, PVC and polycarbonate plastic
Foam insulation for pipe
Cast concrete foundations
For Neoprene:
If neoprene rubber has been talced, this should be removed by washing with detergent or wiping with a solvent-soaked rag. Liquid Rubber can be applied directly to neoprene. Some swelling of the neoprene should be expected, but this will recover over time. The distortion resulting from the swelling will be greater if neoprene is thin and not adhered to a rigid substrate.
For Polyurethane:
A light sanding of the surface is recommended for better adhesion. No swelling will occur.

UNACCEPTABLE APPLICATIONS

Do not use Liquid Roof or Liquid Rubber on the following substrates. For the below applications, you can use the asphalt-based system located here: Asphalt-Based Repairs
.
Built-up asphalt roofs
Asphalt shingles
TPO (Thermoplastic Olefin)
RV roof made of Alpha roof systems
Modified-asphalt roll roofing
Trafficked areas such as decks or patios
Stainless steel, glass, silicone, caulk, foot-traffic surfaces, Hypalon membrane

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