Cold-applied sealant

Cold-applied sealant is a polyurethane, polysulphide or hybrid silicone jointing compound used for sealing manhole frames, chamber rings, gully surrounds and pavement joints around drainage. Unlike hot-melt products, cold-applied sealants cure at ambient temperature through chemical reaction, removing the need for site heating equipment. UK installations comply with BS EN ISO 11600 and BS EN 14188 for road and chamber applications. The material is identifiable by its consistent matte finish and the absence of the heat scorching marks left by hot-melt application. Two-part products provide longer service life and better elastic recovery than single-part formulations. Cold-applied sealants are widely used in town centre and conservation area works across London where naked flame use is restricted. Application is typically by skeleton gun or pumped cartridge, allowing precise placement at deep joints.