Astroflame Passive Fire Protection Products

Trade Name: Astro LST Mastic

Low Smoke & Toxicity Intumescent Mastic Sealant

SDS  Installation Data  

Designed for use within enclosed areas such as tunnels and London Underground stations.

Tested for passenger carrying train systems to BS6853:1999 * and LUL approved

Low smoke and toxicity levels.

Fire resistance testing to EN 1366-3 EI 120, EN 1366-4 EI 240 and BS 476 300mins.

Tested BS 6853:1999 D8.3: Smoke Ao (max)

Fire Classification to EN 13501-2.

Acoustic Isolation to EN 10140 to 48dB.

Tested BS 6853:1999 B.1: Toxicity R value

Air Permeability testing to EN 1026 to 600Pa.

Mechanical Adhesion and Tensile testing to EN ISO 8039 & EN ISO 9046.

Low smoke and toxicity intumescent acrylic sealant.

 

Certifire Accreditation

Certifre Accreditation

Description

A one part intumescent acrylic sealant designed to resist the passage of fire, by forming a char that prevents the passage of fire and smoke, while maintaining excellent low smoke and toxicity levels.

Astro LST Mastic is halogen free and does not emit halogenated by-products under fire conditions.

High performance 5 hour fire rating. Joint movement capability of +/- 12% .

Highly flexible and water resistant it has good unprimed adhesion to a wide variety of common building substrates.

Tested in Block Wall, Concrete, Masonry and Plasterboard Partition. Tested in Concrete Floors.

Tested in Linear Joints up to 50mm wide. Tested in large service openings up to 490 x 150mm.

Tested with Metallic Pipes, Cables, Cable Bunches, Cable Trays and Cable Ladders.

Causes no known effects to plastic pipes, plastic cables, sheathing or metallic components.

In normal use it maintains the sound reduction index of a structure.

Resists fungi and vermin.

This sealant contains no raw materials known to have an estrogenic effect in the environment.

Application Data

Iintumescent Acrylic Sealant Fire Integrity Test Data

Insulation in floor reduces by 50%, however Integrity remains the same.
PE Foam Closed Cell polyethylene backer rod (nominal density 35kg/m³)
MMF Mineral fibre >90kg/m³ density

Properties

HPE application table

LST Mastic is not affected by an outdoor environment. However, for long term storage and ease of installation, it is
recommended that it should be stored indoors ideally in dry frost free conditions above 0°C and below +30°C.

 

Availability

Astro HPE Sealant is supplied in rigid 310ml cartridge format for use with an applicator gun, 25 tubes per pack.

Name

Dimensions

Pack Size

Colour

Product Code

Astro LST Mastic

310ml cartridge

25 per pack

White Only

AFIMLST

To Order & Specify

Please quote: Quantity / Trade Name / Product Ref.
Typical example: 2 Packs / Astro / AFIMLST

Fire Test or Assessment Reports

* BS6853:1999 is the code of practice for fire precautions in the design and construction of passenger carrying trains.

Tests used to access this were ISO 4589-2 (Oxygen Index) : ISO 4589-3 (Temperature Index) : BS6853:Annexe D.8.3 (3m Cube small test) : BS6853:Annexe B1 (mass based toxicity test method NFX 10-700).

Fire resistance testing to EN 1366-3 EI 120, EN 1366-4 EI 240 and BS 476 300mins.

Tested BS 6853:1999 D8.3: Smoke Ao (max)

Fire Classification to EN 13501-2.

Acoustic Isolation to EN 10140 to 48dB.

Tested BS 6853:1999 B.1: Toxicity R value

Air Permeability testing to EN 1026 to 600Pa.

Mechanical Adhesion and Tensile testing to EN ISO 8039 & EN ISO 9046.

Sealant Certification Testing

For specific fire insulation ratings contact Astroflame

Health and Safety

See COSHH datasheet for full details.

Environmental Impact

LST Mastic contributes to a Green Building :-
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.
Noise Reduction.
Thermal Insulation.
Recycling of Packaging.
Avoidance of Air Filtration.
Does not emit halogenated by-products.
Contains no raw materials known to have an estrogenic effect.
The life cycle of LST Mastic is over 20 years.

Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth
FAREHAM, ENGLAND PO15 5RU
tel 0800 023 2482
(01329 844500)
fax 0800 023 2483
(01329 844600)
intl
tel +44 1329 844500
fax +44 1329 844600

 

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