Kingspan Safire™ Intumescent Mastic Plus is 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. Safire™ Intumescent Mastic Plus will also maintain the acoustic design performance.

Safire™ Intumescent Mastic Plus cures when it is subjected to atmospheric conditions, however it will retain a degree of elasticity for joint movement. Under fire exposure, Safire™ Intumescent Mastic Plus creates a robust fire seal by the formation of a durable intumescent char.

 Safire™ Intumescent Mastic Plus can be used with a suitable filling material, i.e. stone wool, 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. 

When activated, the material will expand (intumesce) and prevent the passage of fire and smoke for periods up to 4 hours depending on the application.

General Properties

1. Faster application times and minimal material use due to its ability to achieve high fire ratings and single sided installations.
2. Classified for fire sealing all types of constructions such as drywalls, masonry walls, concrete walls, concrete floors and composite floors.
3. Classified for fire stopping of service penetrations in cross laminated timber walls and floors.
4. Classified for fire sealing all types of building service penetrations such as cables, cable bundles, cable conduits, steel pipes, copper pipes, composite pipes, PVC pipes, PE pipes, ABS pipes, PP pipes and PEX pipe-in-pipes.
5. Classified with commonly used pipe insulations such as stone wool, glass wool, elastomeric, phenolic and PU-foam, both interrupted and continuous through the fire seal
6. Classified for fire sealing against timber, steel and aluminium such as door and window frames.
7. May be installed in drywalls with or without framing around the opening.
8. Available in foil sausages.
9. Emissions tested.
10. Simple to apply with a smooth surface finish.
11. No priming necessary for application to most materials.
12. Suitable for most surfaces, including concrete, masonry, steel, gypsum, glass, plastics and most non-porous surfaces.
13. Hardens quickly and tack free after 1 hour (the fire performance specification of the joint filler has been derived when the joint filler has been let to cure for a month).
14. 24 months storage time (under correct conditions).
15. 25 years working life