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Intumescent & Acrylic Mastics


Safire Intumescent and Acoustic Mastic is a flexible, waterbased, cartridge applied acrylic intumescent sealant.

illustration of sealant in partition joint

Air curing, it forms a non-hardening flexible seal. When exposed to fire it will swell to 4 times its original size, creating a char, preventing the passage of fire, smoke and toxic gases for up to 4 hours.

  • Flexible water based intumescent acrylic sealant
  • Tested to BS476 Part 20/22
  • Upto 4 hours fire resistant
  • Long term flexibility
  • Excellent adhesion

WHERE...

Expansion/contraction joints, cartridge applied in gaps up to 35mm

Irregular or uneven gaps around door casings and window sills

Irregular or uneven gaps around service penetrations

Sealing fire protection boards and partitioning

WHY SAFIRE...

Flexibility - Safire Intumescent and Acoustic Mastic is non-hardening, so will allow a degree of substrate movement. Resistant to cracking and splitting.

Excellent Adhesion - Safire Mastic is is formulated to give excellent adhesion to most building substrates including brick, concrete, steel and plaster without the use of costly primers.

Water Based - Safire Mastic is virtually odourless, and tools and equipment are easily cleaned without the use of solvents.

Environmentally Friendly - Safire Mastic is Halogen free and contains no fibres, so can be used with confidence.

Smooth Finish - Safire Mastic can be easily tooled to a smooth finish using a wet spatular if required.

INSTALLATION...

Safire Mastic is extruded from a cartridge loaded into a standard skeleton cartridge gun.

1. Ensure all surfaces are sound, clean, dry and free from dust or grease.

2. Use the appropriate backing material to set the depth of the seal. Joint width or depth should be not less than 6mm so that there is sufficient material to give the movement required.

3. Gun in the sealant, taking care to avoid entrapping air or leaving gaps, and ensure there is a complete contact between sealant and substrate.

4. Tool down using a wetted spatular. Store in cool dry conditions.

 

 


 


TESTED TO

BS/EN1363-1
BS/EN 1366-1
BS 476 Part 20/22

 


TECHNICAL SPECIFICATION

PHYSICAL FORM
Thixotropic paste

COLOUR
White, other colours available to special order

WORKING TIME
25 minutes

SKINOVER TIME
20 minutes

CURE RATE
3mm per day

MOVEMENT
+/- 10%

APPLICATION TEMPS LIMITS
0ºC to 70ºC

SLUMP
Nil under 30mm joints

SURACE TEMPS LIMITS
0ºC to 100ºC

PACKAGING
310ml cartridge, 25 per box

SHELF LIFE
9 months if stored at 5ºC to 30ºC

 

 

Fireus Ltd. Unit 6 Thetis Road, Lune Industrial Estate, Lancaster, LA1 5QP | Tel.01524 388898 | Fax.01524 383724