Nullifire FS 702 Intumescent sealant

FS702 cures to give a firm but flexible fire seal. Suitable for use in various construction movement joints up to 30%, whilst providing an excellent acoustic and air seal. FS702 is ideally suited for use around small annular service penetration seals in walls and floors. It can also be used for the bonding and pointing of joints and service penetrations in conjunction with Nullifire FB750 coated boards.

FS702 is suitable in low movement fire rated joints to seal between joints in FB750 fire rated coated batts, substrate to penetration service applications and pointing up of penetration seals. FS702 sealant may be used to provide a linear joint seal in various configurations.


Masonry to masonry
Masonry to timber
Masonry to steel
FB750 to flexible wall
FB750 to rigid wall
Flexible wall to flexible wall
Flexible wall to rigid floor
Rigid floor to rigid floor
Rigid wall to rigid wall

Key Features:

Can achieve up to 4 hours joint fire resistance tested in accordance with EN 1366-4 and ETAG 026
Ideal for sealing low movement joints – suitable for gaps up to 50 mm wide
Suitable for rigid and flexible walls
Used for sealing FB750 Coated Fire Batts
Acoustics up to 61 dB
Air seal up to 2,000 Pa

Base: Acrylic Caulk

Curing: RTV Curing

Viscosity: Gun applied

Packaging: 310 ml cartridges also available in brush and trowel grade ( 5 kg bucket)


ECT Adhesive Solutions, Unit 5, Willsborough Industrial Estate, Clonshaugh, Dublin D17 X336.

+353 1 885 0000