FIRE RATED ECONOMY PU FOAM - Installation Guide

Introduction

The purpose of this document is to give guidance to approved contractors and suppliers who are engaged in the fire stopping of service penetrations in fire rated structures using the Astro FRA foam

All service holes through floors and compartment walls must be fire stopped to prevent the passage of fire, smoke and hot gases.

• Prevent the spread of fire, smoke and hot gases through a building by containing it in the compartment of origin.
• Maintain the integrity of escape routes from a building.
• Reduce loss or damage to property from the effect of fire and smoke.
• Maintain pressure differential between compartments and ventilation channels.

THE ASTRO FR-EC FOAM SYSTEM

ASTROflame FR-EC Foam is a one component polyurethane foam which expands to fill and seal gaps. Note: This product is fire rated but is not intumescent.

The product cures quickly through the absorption of moisture from the atmosphere and has excellent adhesive properties. Once set, ASTRO FR-EC Foam forms a strong bond to most building materials such as wood, brick, stone, cement, plaster, polystyrene, metals and many plastics.

ASTRO FR-EC Foam acts as a fire seal in accordance with BS476 Part 20 and meets Class B1 of DIN 4102 Part 1.

NHBC Type Approval.

The cured foam has a substantially closed cell structure throughout. It hardens to a semi-rigid form which is both firm and yielding (approximate movement accommodation +/- 5%).

Composition
A one component aerosol packed polyurethane foam that cures by moisture absorption to form a semi-rigid foam

Change After Application
After release the foam expands to form a semi-rigid sealer/adhesive.

Yield
Up to 28 litres (750ml size).

Availability

Supplied in 750ml pressurised containers. 12 per box 624 cans per pallet (52 boxes)

Installation

No special surface preparation or primers are required but surfaces in contact with the product must be clean of loose matter, grease or oils.

ASTRO FR-EC Foam will not adhere to Teflon, polythene of silicone coated surfaces.

Loose components may need to be clamped or secured in position at least until the foam sets. Surrounding surfaces should be suitably masked and protective clothing worn.

The container must be shaken before use to thoroughly mix contents and must be inverted during use. Where gaps deeper than 50mm are to be filled, the ASTRO FR-EC Foam must be applied in layers allowing each to cure properly.

Within the first few minutes of application, splashes of material may be removed from unwanted (non-porous) surfaces using a suitable solvent. However care should be taken to ensure that the solvent used will not stain or attack the surfaces onto which it is being applied.

The yield and rate of cure will vary according to temperature and humidity. Curing will be assisted by wetting the contact surfaces immediately prior to application. Once fully cured ASTRO FR-EC Foam can only be removed by mechanical means. Excess material may be trimmed off using a sharp knife or sanded down.

Compliance

Astro FR-EC Foam is manufactured in the EU, meeting the highest quality standard in compliance with ISO EN 9001:2000 . For fire test certification contact Astroflame Fireseals technical department.

Fire Test and Assessment Reports

BS Standard 476 part 20.

UN Classification 1950 - Class 2.1

Storage and disposal

Astro FR-EC Foam should be stored indoors - shelf life is 12 months from date of supply .

For additional testing, certification or technical information please contact ASTROFLAME FIRESEALS LTD.

Issue 01/03

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