Designed to prevent the spread of fire, smoke and gases through openings in fire rated walls and floors.
ULTRA™ Acoustic Fire Mastic is a 4 hour rated intumescent sealant formulated with fillers that provide noise reduction.
ULTRA™ Acoustic Fire Mastic cures when it is subjected to atmospheric conditions, however it will retain a degree of elasticity for joint movement. Under fire exposure, ULTRA™ Acoustic Fire Mastic creates a robust fire seal by the formation of a durable intumescent char.
The sealant has undergone tests to BS 476-20:1987 and BS EN 1366-3:2009 with additional guidelines from BS EN 1366-3:2006 for fire protection joints and testing. Sealant also a component material in testing for BS 476-22:1987 with seal using coated stonewool batt.
Features & Benefits
Fire rated in both horizontal & vertical joints
No priming required for most construction substrates
Joint movement capability of 7.5%
For use in joints up to 50 mm wide
Excellent slump resistance
18 months shelf life
Fast cure - tack free within an hour
Easy to apply and tool off
Excellent adhesion to most common building substrates