NULLIFIRE FS701 Intumescent Acrylic Sealant (Fire Rated)


NULLIFIRE FS701 is a one-part fire resistant joint sealant.

FS701 cures to give a firm, but flexible seal in low movement fire rated joints to seal between joints in FB747 FR Coated Batts, substrate to penetration service applications and pointing up of penetration seals.

FS701 Sealant may be used to provide a linear joint or gap seal with specific supporting constructions and substrates and as a penetration seal.


Masonry to masonry
Masonry to timber
Masonry to steel
FB747 to flexible wall
FB747 to rigid wall
Flexible wall to flexible wall
Flexible wall to rigid floor
Rigid floor to rigid floor
Rigid wall to rigid wall


Can achieve up to 4 hours joint fire resistance tested in accordance with EN 1366-3,

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 FB747 Coated Fire Batts

Acoustics up to 61 dB

Air seal up to 600 Pa

Single sided seal tested

Easily paintable

Priced and sold per single 310ml cartridge. 12 cartridges per box.

WHITE or GREY colour