Firestop sealants are essential for preventing the passage of smoke and flames through small gaps and cracks in a building’s infrastructure. They are generally suitable for gaps upto 2-4cm diameter and can provide protection for up to 4 hours. (please see product pages for specific details).

With different sealants on the market it is important to understand which is most suitable for your building.

Silicone Sealants

Silicone Firestop Sealants offer flexibility while maintaining stability in the event of a fire. They are also resistant to other chemicals, moisture, and weathering. When applying silicone sealants, they must be given time to cure.

PFC Corofil Fire Rated Silicone Sealant provides up to 4 hours of fire protection and is designed to be used around metal based services which penetrate through concrete, masonry or blockwork walls. It can also be used to seal linear joints.

Rockwool Silicone Sealant also provides up to 4 hours fire protection, designed to be used in joints (up to 40mm) with high movement capability or where they are formed between dissimilar substrates such as steel and masonry.

Ablative Sealants

Ablative FireStop Sealants absorb the energy of a fire to protect what is underneath. This prevents the spread of fire and buys valuable time. The heat energy is consumed from the fire and is then released in the form of gases as the sealant chars to form insulation.

Intumescent Sealants

Intumescent Firestop Sealants are primarily used around plastic pipes and materials that penetrate through substrates. Intumescents swell on contact with high temperature, preventing the passage of smoke and flames through gaps.

PFC Corofil offers High Expansion Sealant which protects for up to 4 hours, as well as their Acoustic Intumescent which performs as both fire protection and acoustic insulation. The sealant is designed to be used along linear gaps in horizontal and vertical constructions (up to 50mm).

Astroflame Intumescent Mastic is designed to be used to reinstate the fire resistance of wall and floor constructions in linear joints and where apertures are penetrated by multiple services. It is required for use with the Astroflame Ablative Batt where raw/cut edges are exposed. This ensures the protective qualities are maintained even when the batt is cut to size.