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Astroflame Intumescent Acoustic Mastic

4.5 out of 5 stars
£3.59 inc VAT
£2.99 ex VAT
Product Overview

Astroflame intumescent acoustic mastic is ideally suited for sealing and maintaining a structures fire and acoustic integrity when penetrating with pipes and cables. Astroflame intumescent mastic is designed for sealing gaps around fire doors, sealing joints and irregular holes.

  • 240 minute fire rated mastic sealant
  • Independently tested to BS 476-20 & EN 1366-4
  • Acoustic tests to BS EN ISO 140-3
  • Available in three colours
  • Suitable for sealing:
    • Gaps around fire doors
    • Gaps around window frames
    • Gaps around cable and pipe penetrations
    • Gaps in low movement joints up to 25mm wide
  • Supplied in 310ml tubes
  • For internal use only
Technical Data
Product Code
Brand Astroflame



AFIM/WHITE: 0.35kg

AFIM/BROWN: 0.35kg

AFIM/GREY: 0.35kg

Product Datasheets
FAQs (1)
Q. Please would you tell me what distance one tube of it covers, so that I can work out how many tubes I need to order

The amount of coverage does depend on the size of gap. Please find below approximate distances based on different size gaps:

6mm x 6mm = 8.6 meters per tube
9mm x 6mm = 5.8 meters per tube
18mm x 12mm = 3 meters per tube

Pricing & Availability

Model Stock Price
Product Code: AFIM/WHITE
Stock Level:
More than 20 in stock Expected dispatch: Today

£3.59 inc VAT

£2.99 ex VAT

Product Code: AFIM/BROWN
Stock Level:
More than 20 in stock Expected dispatch: Today

£3.59 inc VAT

£2.99 ex VAT

Product Code: AFIM/GREY
Stock Level:
Out of stockExpected dispatch: N/A

£3.59 inc VAT

£2.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.79 inc VAT - Orders will be delivered in 3-5 working days by Hermes

Express Delivery

£7.91 inc VAT - Orders will be delivered in 1-2 working days by Hermes

Customer Reviews

4 customers have given this product an overall rating of 4.5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: J W

So easy to use, why take chances!

Published on: 12th September 2018

Rating: 4 / 5 Stars

Reviewed by: W S

Did what the product was designed for seal potential gaps for fire to transfer to the next room etc.

Published on: 25th September 2017

Rating: 4 / 5 Stars

Reviewed by: D S

Does what it says on the tin! Good Value

Published on: 6th January 2017

Rating: 5 / 5 Stars

Reviewed by: L M

works and handles well

Published on: 25th July 2016

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

Direct Telephone 01507 464152