Where other mastics fail, Astroflame’s High Pressure PFP Sealant picks up the slack, ensuring fire spread prevention that you can depend on. This graphite formulation is designed to secure openings in fire rated walls and floors against the spread of smoke, gases, and of course, fire. It does this 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.

The sealant is of a subtle grey colour, fitting in well with almost all standard materials (just in case aesthetics are such a concern), 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 to ensure environment and user-friendliness, and on top of all that, there is no priming necessary for applying it to most materials.

We’re not done, though. 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 most non-porous surfaces, including steel, wood, glass, and concrete. It can be stored as it is in 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 (that’s quite a long time).

Finally, it should be noted that the performance of the High Pressure Sealant is based on testing conducted after it has been allowed thirty days to cure.