This graphite formulation is designed to secure openings in fire rated walls and floors against the spread of smoke, gases, and of course, fire. The sealant is dark grey in colour, fitting in well with almost all standard materials, and is rated primarily for use with plastic pipes, cables, and combustible pipe insulations. It is simple to apply, has a smooth surface finish, provides high sound insulation, has low emissions, and on top of all that, there is no priming necessary for applying it to most materials.

It does its job quickly as well, forming its film in 30 minutes, becoming non-sticky and tack free after an hour, and taking up to five days to fully harden, depending on thickness and temperature. Once set, the graphite will expand when exposed to fire, closing openings around penetrations and filling space left by low-temperature melting materials. It should be noted, however, that the performance of the filling is based on testing conducted after it has been allowed thirty days to cure. 

Aside from accommodating difficult services that traditional mastics cannot fulfil, this High Pressure Sealant is made with flexibility in mind. It will accommodate movement up to 12.5%, and is suitable for use on steel, wood, glass, concrete, and most other non-porous surfaces. It can be stored at temperatures between 5˚C and 30˚C for a minimum of twelve months, and when fully applied it has a working life of thirty years. You’d have difficulty finding a more reliable fire prevention sealant than this.