tel 01329 844500 (+44 1329 844500) email:

Fire Resistant Flexible Coating - Trade Name: ASTRO FLEXI-COAT SEAL

CE Certification Flexi-Coat


UL CE and other certification logos.

CE Documents:

'DoP's = Declarators of Performance.

'CoC's = 'Certificates of Constancy'

TDS = Technical Data Sheet

Flexible fire resistant coating

DoP Astro Flexi Coat Seal

CoC Astro Flexi Coat Seal

TDS Astro Flexi Coat Seal

UL EU Documentation


  Installation Video

Product Images


Flexi-Coat has been developed for use on a stone wool or elastomeric base.

Flexi-Coat remains highly flexible to permit thermal and mechanical movement of services and the buildings structure.

Once the Flexi-Coat is applied it prevents the passage of fire, smoke and sound between fire rated compartments giving a fire resistance tested to BSEN 1366-3 EI 120 and BSEN 1366-4 EI 120.

Flexi-Coat has also achieved 600Pa air permeability resistance testing to EN1026 and 450Pa water permeability resistance testing to EN 1027.

Tested with metallic pipes, cables, cable bunches, Cable Trays and Cable Ladders and causes no deleterious effects to plastic pipes, plastic cables, sheathing or metallic components.

Optimum solution for the sealing of the slab edge to the external cladding system - offering high movement capabilities.

Install on base of 80kg/³ stone wool for flexible installations.

Can be installed in to voids / cavities up to 500mm wide. Flexi-Coat is a water based elastomeric acrylic coating, having excellent fire, water, air permeability and elastomeric properties offering up to 50% movement.

Ideal for spray, trowel, brush & pouring applications.

Halogen free. Unaffected by oil. Resists vermin and fungi. Contributes to Green Building.

Can be used in conjunction with our FLEXI BOARD.

Key Properties

Up to 2 hours fire resistance.

Smoke, acoustic, air and water barrier.

Offers 50% joint flexibility between -10 to +95 °C.

Fire Resistance EN 1366-4 EI120, EN 1366-3 EI 120

Fire Classification EN 13501-2

Acoustic Isolation EN 10140 to 52dB

Air Permeability EN 1026 to 600Pa

Water Permeability EN 1027 to 450Pa

VOC Tested ASTM D2369-10, LEED 2009-EQ 041 SCAQMD

Suitable for indoor use without additional environmental protection.

Withstands high pressure water and air.

Dynamic movement testing 500 cycles per 30 minutes.

Can be spray, brush, pour or trowel applied.

Ideal for slab edge applications, head of wall and movement installations.

Suitable for voids up to 500mm wide.

Ideal for spray, trowel, brush & pourable application.

Highly flexible and water resistant



Water based flexible acrylic coating




1.25 - 1.3 g/cm3

Cure Rate

0.5mm per day at 50% relative humidity 23°C

Tack Free

6hrs at 23°C, 50% RH

Coating Thickness

1mm Nominal, wet coating thickness

Fire Resistance

EN 1366-4 EI 120 & EN 1366-3 EI 120


EN 1366-4 EI 120 & EN 1366-3 EI 120


EN 13501-2

Acoustic Isolation

EN 10140 43dB when installed with 100mm thick 80kg/m2 stone wool.
EN 10140 52dB when installed with 200mm thick 80kg/m2 stone wool.

Air Permeability

600 Pa EN 1026 - 100Pa 0.4/1.5 m3/h/m2

Water Permeability

450 Pa EN 1027 - No Leakage

Container Size

500 cycles per 30 mins - 50% expansion and compression


7.4 Litre


500 cycles per 30 mins - 50% expansion and compression

Flexi-Coat has undertaken dynamic movements tests in excess of 500 per 30 mins cycles extending to 150mm and compressing to 80mm. After 1000 cycles there was no visible or physical deterioration of the Flexi-Coat.


Astro Flexi-Coat Seal: 7.4 Litre Pail, Colour White. For long term storage and ease of installation it is recommended that it should be stored indoors, in dry conditions. Storage temperature between -5°C and +25°C. Shelf life 12 months from date of manufacture.

Product Code

Product Description



Astro Flexi-Coat Seal


To Order & Specify

Please contact us and quote the following information - Please quote- Quantity / Product Code / Product Description
Typical wording- 5 / AFBFLEXICOAT / Astro Flexi-Coat Seal

>> Tel: +44 1329 844 500 or >> Email:

Fire Test & Assessment Reports

Fire Resistance EN 1366-4 EI120, EN 1366-4 EI 120
Fire Classification EN 13501-2
Certifire 3rd Party Accreditation
Acoustic Isolation EN 10140 to 52dB
Air Permeability EN 1026 to 600Pa
Water Permeability EN 1027 to 450Pa
Dynamic movement testing 500 cycles per 30 minutes.

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel +44 1329 844 500 or email

Environmental Impact

Flexi-Coat Seal contributes to a Green Building :-
Low VOC (air quality).
No Power Tools required for installation (no energy source required).
Dust free.
No water pollution.
Smoke and Air Tightness.
Water Tightness.
Noise Reduction.
Thermal Insulation.
Recycling of Packaging.
Avoidance of Air Filtration.
Contains no halogens or asbestos.
Contains no raw materials known to have an estrogenic effect.
The life cycle of Flexi-Coat Seal is over 25 years.



Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth

tel 0800 023 2482 (01329 844500)

fax 0800 023 2483 (01329 844600)

intl tel +44 1329 844500

intl fax +44 1329 844600