Roof Seal Seal It Reinforcing Mat Heavy Duty Liquid Membrane 1m x 25m ( 25m2 ) Features: A heavy duty, spunbond polyester mat which is tear and puncture resistant. For use with Seal It Liquid Membrane system. PRODUCT DESCRIPTION: Used in conjunction with Seal It Liquid Membrane:- heavy duty spunbond polyester; tear and puncture resistant; improves strength; rapid repair for blisters, splits and tears in existing substrates prior to coating. APPLICATION: Temperature during application of primer must be above 5oC. Apply a single coat of Seal it Primer to the surface with a brush or roller. Follow coverage rate to ensure minimum thickness is achieved. Leave to fully cure, normally overnight, in cold weather it may require 48 hours to fully cure. White patches in the film indicate .