Astroflame spreadable mastic is designed for sealing cut (open) edges when working with Astroflame fire resistant flexible board. When applied to cut sections, joints and service penetrations, the sealant maintains the integrity of fire resistant flexible board whilst at the same time preserving its flexibility.
- 120 minute fire rated
- Tested to BS 476: Part 20/22
- Allows movement of services
This is the technical data for the Astroflame Flexible Coating.