Intumescent Seals (30 mins) Fire Only
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Astro Strip FO – Fire‑Only Intumescent Seal
Certified passive fire protection for timber and composite fire doors. Astro Strip FO seals expansion gaps in fire door assemblies, ensuring integrity for 30–60 minutes in the event of a fire, without smoke sealing.
Key Benefits:
- Tested and Certifire approved under BS 476‑22:1987
- 30‑minute protection with 10 mm or 15 mm width models
- 60‑minute protection with 20 mm or 25 mm width models
- Self‑adhesive backing ensures fast, clean installation
Construction:
- Graphite‑based intumescent core enclosed in durable PVC sleeve
- Expands during fire to block flames and hot gases—forms a reliable barrier
- Clean and simple fit into door leaf or frame rebate
Availability:
- Profiles (thickness x depth):
- 10 mm × 4 mm — 30 min (AF1004 FO)
- 15 mm × 4 mm — 30 min (AF1504 FO)
- 20 mm × 4 mm — 60 min (AF2004 FO)
- 25 mm × 4 mm — 60 min (AF2504 FO)
- Supplied in 2.1 m or 1.05 m lengths
- Colour options: black, brown, grey, red, white
Usage Notes:
- Ideal where fire protection is required but smoke sealing isn’t
- Compatible with Certifire 30‑minute timber doors up to 2040 × 926 mm (leaf thickness ≥ 42 mm) :contentReference[oaicite:1]{index=1}
- Supplied with strong adhesive tape to ease installation
Ordering Details:
- Specify product code, profile, colour, and desired length
e.g. “100 × AF1504 FO × White × 2.1 m”
- Contact via phone or email; orders before 2 pm (Mon–Fri) ship next working day :contentReference[oaicite:2]{index=2}
Astro Strip FO offers a robust, fire-certified solution that expands to seal fire door gaps during emergencies—without the additional cost or complexity of smoke sealing.
Shipping & Returns
WHY CHOOSE PREMIER?
40+ Years of Trust
With over 40 years of combined experience, our team has been trusted by domestic and commercial customers across the UK. We work with fully certified, highly skilled independent installers - including those with FIRAS and BM Trada credentials -to deliver fire door sets you can rely on. Every product and service is backed by decades of hands-on expertise and a commitment to high-quality results.
No Quibble Returns
We want you to feel 100% confident when ordering with us. That’s why we offer No Quibble Returns on all eligible items.
- Items must be in original packaging, and in the same condition you received them.
- Bespoke or made-to-order items are non-refundable.
- Simply email us at sales@activefiresafety.com to request your return.
- We’ll send you a return label and instructions - we make it easy.
- Refunds are processed once your item is received and approved.
For more information, visit our Refunds & Returns Policy
Real Human Support
We get it! There’s nothing worse than needing help and only getting AI bots or auto-replies.
When you contact us, you’ll speak to a real person who knows fire safety and actually wants to help.
Whether you’ve got questions before buying or need support after your order, we’re here every step of the way. No ticket numbers, no frustrating loops, just real answers.
Straightforward Shipping
Shipping costs are clearly shown before you checkout. We work with trusted couriers to ensure smooth and fast trackable delivery straight to your door.
