fire rated acrylic sealant


Fire-rated acrylic sealant is one part, ready to use sealant. For where the integrity of the floors, fire walls or partition needs to be maintained. Intumescent qualities enable the material to char and swell under heat conditions, producing a fire, smoke & acoustic resistance seal.

Fire and Acoustic Acrylic Sealant
Firesure™ FR Acrylic Intumescent Mastic is for use

Flexible walls with a minimum thickness of 75mm and comprise steel or wooden studs lined on both faces with a minimum of 1 layer of 12.5mm thick plasterboard. The wall is permitted with or without insulation between the boards.


Rigid walls with a minimum thickness of 75mm and comprise concrete, aerated concrete or masonry, with a minimum density of 650kg/m3.


Rigid floors with a minimum thickness of 150mm and comprise aerated concrete or concrete with a minimum density of 650kg/m3.


The supporting construction must be classified in accordance with EN 13501-2 for the required fire resistance period.


All surfaces must be clean and sound, free from dirt, grease and other contamination. Wood, plaster and brick may be damp but not running wet. Use mechanical abrasion to clean porous surfaces before application. Used for sealing joints, irregular holes in fire walls and for filling gaps between cables, pipes and duct services that penetrate fire walls and partitions. Also used for internal perimeter pointing of fire rated doors and window frames.


Storage - Store in cool dry conditions between +5ºC to 30ºC


Health and safety

Wash material from skin while still wet. In case of contact with eyes flush immediately with plenty of water. Seek medical advice if this discomfort persists. Avoid oral contact.



Store away from children. Avoid contact with skin and eyes. Do not swallow. To be kept frost free.


Excellent adhesion – Halogen free – Easy to apply – Sound deadening – Up to 4 hour protection

Can be used in joint widths up to 100mm wide  – Permanently flexible – Over paintable

4 hour fire rating BS 476 20:1987 BSEN 1366-3/4

Acoustic sealant for sound deadening tested to BSEN ISO 10140-2-2010.

Sealant Usage

To get a reasonable usage estimate use formula below.

Formula is size of tube (ml) divided by the square area of the seal (width of joint (mm) x depth of joint (mm)) =.

Example. Tube holds 310ml and the joint is 5mm wide x 5mm deep this becomes

310 ÷ (5 x 5) = Number of lineal metres per 310ml tube. 310 ÷ 25 = 12.4 lineal metres.

**Remember to factor in or allow for some wastage**

Fire and Acoustic Acrylic Sealant






Firesure Mastic Installation-Instructions

132A Firesure Mastic

Firesure Mastic Safety-Data-Sheet

Firesure Mastic Tehnical Data Sheet

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