Lorient Intumescent Sealant

Intumescent Mastic Data Sheet
Data Sheet
Intumescent Mastic

Lorient Intumescent Sealant is a versatile seal solution to fill gaps and movement joints; and for use where rigid seals are impractical.


When exposed to fire, Lorient Intumescent Sealant

expands in volume to fill all cavities; providing a

necessary hot smoke seal.

It is suitable for sealing gaps between fire resistant

walls and floors, between conduits and walls/floors

and between fire resistant walls and structural

supports. Lorient Intumescent sealant is also

recommended for sealing the perimeter of fire and

smoke resistant damper/air transfer grilles.


Key benefits

Successfully fire tested in accordance with

BS 476 Pt. 20:1987.

It can provide effective acoustic containment.


Specially formulated for adhesion to a wide range of

materials including: wood; metal; plastic; concrete;

masonry and plasterboard materials.


Flexible - it tolerates differential movement in

everyday service.


Water based - therefore easy to clean up.

It can be neatly injected into otherwise

inaccessible areas.


Smooth gunnability and tool off finish.

Paintable (if the sealant is to be overpainted, Building Regulations may require a fire resistant coating).


Range of colours;

White, Brown, Gray,





Supplied in individual 310cc cartridges or in boxes of 25 units.