tel 01329 844500 (+44 1329 844500) email:


Astro PS Coating CE certification.


UL CE and other certification logos.

CE Documents:

'DoP's = Declarators of Performance.

'CoC's = 'Certificates of Constancy'

TDS = Technical Data Sheet

Astro Coat ablative coating.

DoP Astro PS Coating

CoC Astro PS Coating

TDS Asto PS Coating

UL EU Documentation


Installation Video


Astro Penetration Seal Coat is a thicker formulation, for brush application, to coat plain stone wool as it is being installed by the user: it can also be be applied to insulation already in place on the services, adding to the fire resistance of the seal.

It prevents the passage of fire, smoke, air and sound between fire rated compartments and has been tested in block wall, concrete, masonry, plasterboard partition, composite panel, durasteel wall and concrete floors.
Astro PS Coat is a water-based, acrylic, ablative coating with excellent fire, water, air permeability and elastomeric properties.

At normal temperatures PS Coating remains flexible to permit thermal and mechanical movement of services and the building structure.

ASTRO PS Coat has been tested to EN1366-3 EI30,EI60 when applied to pre-fitted stone fibre of 140kg/m3 density and 50 to 150mm thickness.

Key Properties

• Fire Resistance Testing to EN 1366-3 EI30, E60
• Fire Classification to EN 13501-2
• IET (IEE) 17th Edition Fire Stop Compliant to Regulation 527.1-3 - Electrical Installations.
• BS 7671-2008 Chapter 42 & 52 - Electrical Installations Fire Resistance.
• Air Permeability testing to EN 1026 to 600Pa
• Acoustic Isolation testing to EN 10140 to 51dB
• Remains flexible between -5°c to +70°c
• Easy to use fibre free coating
• Suitable for large openings in walls and floors with additional supports.
• Life expectancy of over 25 years
• Flexible and water resistant
• Contributes to Green Building
• Flexibility and LOI tested –ASTM D522 &
ISO 4589-2:1996
• Can be spray, brush or trowel applied
• Tested in Block Wall, Concrete, Masonry, Plasterboard Partition, Composite Panel and Durasteel Wall
• Allows user to choose the stone wool substrate
• Fire and smoke seal up to 240 mins
• Used seal penetration seals with on-site coating application


Properties & Specification


Water based flexible acrylic coating



Specific Gravity

1.45– 1.55 g/cm³

Fire Resistance

EN 1366-4 EI 60


EN 1366-3 120mins


EN 13501-2

Acoustic Insulation

EN 10140 51dB when installed with 100mm thick 140kg/m3 stone wool.

Air Permeability

600 Pa EN 1026 - 100Pa 1.8/1.4 m3/h/m2

Shelf Life

12 Months

Cure Rate

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

Tack Free

6 hrs at 23°C, 50% RH

Application Temperature

+0°C to +30°C

Coating Thickness

2.5mm Nominal, wet coating thickness

PS Coating Coverage

2.8kg/m², 2.24L/m²

Spray Pressure

Machine 90psi / Tip 6000psi / Tip Size 0.85mm

Installation Specification

50mm stone wool - EI 60 - EN 1366-3
100mm stone wool - EI 120 - EN 1366-3



ASTRO PS COATING - Sold per 5 Kilo Tub.

To Order & Specify

Please quote:


Trade name

Product ref

Typical wording





Astro Coat is manufactured in the EU, meeting the highest quality standard in compliance to ISO EN 9001.
For fire test certification and technical advice contact Astroflame technical department.

Health and Safety

Use rubber gloves and eye protection to avoid skin and eye contact.
Keep out of reach of children.
Does not emit halogen or other toxic gases when exposed to flame.
Normal good industrial and personal hygiene practices should be observed.

Environmental Impact

Low VOC (air quality).
No Power Tools required for installation (no energy source required).
Dust free.
Low Ozone Depletion Potential (ODP).
Low Global Warming Potential (GWP).
No water pollution.
Smoke and Air Tightness.
Water Tightness.
Noise Reduction.
Thermal Insulation.
Recycling of Packaging.
Avoidance of Air Filtration.
Does not emit halogenated by-products.
Life cycle of 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