This website uses cookies to ensure you get the best experience on our website. Learn more

Ultra Acoustic Fire Mastic

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
  • Halogen free
  • Paintable
  • Excellent adhesion to most common building substrates
  • Reduces sound transmission in joints