Astro Fire mastic is a an acrylic intumescent mastic sealnt designed to prevent the spread of fire and smoke through joints and openings in fire rated walls and floors (including openings formed around building service penetrations). This fire rated instuscent sealant also helps maintain the acoustic design performance of fire-rated walls and systems The Astro PFP FR Acrylic can be used with a suitable filling material i.e. stone wool or Astro PFP FR backing material in order to secure correct width to depth ratio, and to reduce the shrinking of the sealant during curing. Minimum depth and maximum width of the joints are included in the installation instructions. Key Features: Intumescent Technology: The sealant expands when exposed to heat, creating an effective barrier against fire and smoke. Under fire exposure, The Astro PFP FR Acrylic creates a robust fire seal by the formation of a durable intumescent char. Certified and Reliable: Fully certified to meet BS standards, ensuring high performance and reliability in fire protection. The fire mastic is CE and UKCA approved. Versatile Use: Ideal for sealing joints, gaps, and penetrations in fire-rated walls and partitions. Suitable for use around cables, pipes, and ducts. Easy Application: A one-part, ready-to-use acrylic sealant that offers excellent adhesion to a wide range of substrates, including wood, metal, and masonry. When subjected to atmospheric conditions, this fire rated intumescent sealant cures however, it will retain a degree of elasticity for joint movement.
