ireprotect (Chester) Ltd
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Manufacturers & Suppliers of Passive Fire Protection Products
FCL Intumescent Mastic
FCL-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.
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
Water based - therefore easy to clean up.
It can be neatly injected into otherwise
Smooth gunnability and tool off finish.
Paintable (if the sealant is to be overpainted,
Building Regulations may require a fire resistant
Range of colours; white as standard.
Supplied in individual 310cc cartridges or in boxes of 25 units.
Instructions for use
1. Surfaces should be free from oil and dust.
2. Very porous surfaces should be dampened
3. Cut nozzle to achieve suitable bead size.
4. Apply to joint or cavity, being careful to avoid
entrapped air or bubbles.
5. Large joints, but not exceeding 25mm, can
be built up with additional applications after
initial drying, in order to avoid excessive
slump. For joints in excess of 25mm, packing
with non-combustible material such as
mineral wool should be carried out.
6. Surface may be dressed with a wet spatula
if required and will be tack-free in
approximately 20 minutes.
7. Clean tools with water immediately after use.
8. Overpainting, if required, may be carried out
after 48 hours, using any conventional paint
Store in cool dry conditions between 5°C and 25°C.
Do not allow to freeze.