intumescent fire mastic


Intumescent mastic fireproofing: An Intumescent Fire Retardant Acrylic Sealant is one part, ready to use sealant designed for internal perimeter pointing of fire rated door and window frames where the integrity of the firewalls or partition needs to maintain. Intumescent qualities enable the material to swell under heat conditions, producing a fire and smoke resistant seal. Used for internal perimeter pointing of fire rated doors and window frames. Also used for sealing joints, irregular holes in fire walls and for filling gaps between pipes and services that penetrate fire walls and partitions.


Clean all joins of loose dirt, dust, old sealants and other contaminants that could impair adhesion. Surfaces should be cleaned and degreased by wiping with a safe solvent impregnated cloth.

Do not apply in temperatures below 5 degrees centigrade. When sealant is used in a joint configuration masking tape should be used to prevent contamination to adjacent substances and ensure a neat sealant line.

Remove the masking tape immediately after tooling. Tool the joint within 5 minutes of application to give a smooth professional finish.

Typical Properties

  • Slump : Nil
  • Shrinkage : Approx 12%
  • Staining : Nil
  • Tack Free Time : 30 - 45 minutes
  • Water Resistance : Good when fully cured
  • UV Resistance : Good
  • Joint movement : Plus / Minus 7.5%
Fire and Acoustic Acrylic Sealant

Contact Us for Fire Rated Intumescent Mastic

Related Products

Intumescent Pipe Wrap

Intumescent Pipe Wrap

Description A flexible Intumescent sleeve designed to fit around plastic pipe work. The Intumescent material is enclosed in a plastic…

Read More »

Intumescent Glazing Channel

Intumescent Glazing Channel

Description A rubber based Intumescent glazing channel to suit 1/2 hour fire rated glass between 5mm & 7mm thick. Application…

Read More »

PU Coated Glass Cloth

PU coated glass cloth

Description PU Polyurethane Coated Glass Fibre SMOKE Cloth is halogen free, impermeable to gases, and has high stability.   In…

Read More »

Fire and Acoustic Acrylic Sealant

Fire & Acoustic Acrylic Sealant

fire rated acrylic sealant Description Fire-rated acrylic sealant is one part, ready to use sealant. For where the integrity of…

Read More »

About us Background image (Orange)

Find out how we can help you

We are happy to offer advice on our products or discuss what you may need. Feel free to drop us a message and we will be in touch as soon as possible.