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  Home > Fire Stop Products > Expansion Joint Seals

Intumescent Expansion Joint Seals - 2Hr Rated
Intumescent Expansion Joint Seals - 2Hr Rated

Intumescent Expansion Joint Seals - 2Hr Rated

Fire Rated Expansion Joint Seal / Linear Joint Seal

Available up to 150mm gap size.

Joint movement capability of +/- 50%.

Fire resistance testing to EN 1366-4 E 120, EI120 and BS 476 240mins.

IET (IEE) 17th Edition Fire Stop Compliant to Regulation 527.1-3 - Electrical Installations.

BS 7671-2008 Chapter 42 & 52 - Electrical Installations Fire Resistance.

Acoustic Isolation to EN 10140 to 22dB.

Air Permeabiltiy testing to EN 1026 to 600Pa - 100Pa 3.3/1.7 m3/h/m2 with FLEXI COAT.

Highly flexible and water resistant.


Designed for long linear joint installations in both horizontal and vertical applications it is a flexible and water resistant seal that expands when exposed to heat. The carbonaceous char formed by the graphite prevents the spread of fire through the joint thus ensuring the integrity of the compartment wall/floor is maintained.

Tested in block wall, concrete and masonry. Tested in concrete floors. Tested in linear joints up to 150mm wide.

Tested with cables, cable bunches, cable trays and cable trunking.

Joint movement capability of +/- 50%.

Areas of Use

Between steelwork and blockwork where deflection and movement could occur

  • In movement joints with blockwork walls and floors.

  • Top of wallhead to the underside of the floor - although gaps could be uneven ASTROflame Intumescent Expansion Joint Seal is extremely compressible and should accommodate any irregularities.

  • Expansion Joint is an extremely versatile filler material.


Sold in One Metre lengths in a range of widths and depths to seal different gap dimensions.

Gap Width

Dimension of Seal


Product Ref


up to 10mm


120 min


11mm to 20mm


120 min


21mm to 25mm


120 min


26mm to 35mm


120 min


36mm to 50mm


120 min


50mm to 60mm


120 min


61mm to 75mm


120 min


76mm to 100mm


120 min


101mm to 120mm


120 min


121mm to 150mm


120 min




Sold individually.

Fire Test or Assessment Report

Certifire Approved

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practises should be observed.


Installation is easily effected by compressing the pre cut ASTROflame Intumescent Expansion Joint Seal and inserting into the joint and releasing. A minimum compression of 15% per thickness of material is recommended to ensure a rigid friction fit.

Ordering Example:

To specify for a gap width of  20mm order Gap Width Dimension 11mm to 20mm. In the shopping basket set the number of one metre lengths you require. Supplied by the metre.

Gap Width Size

Our Price: £3.16

Prices include VAT.

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