Best in 7 days
![fischer FFB-VS 25 401-450 VentiStop Cavity Barrier
[521528]](https://cdn.shopify.com/s/files/1/0657/4496/1700/files/Fischer_FFB-VS_main_7fbaadcb-cbae-405e-b6bb-cde996a22b42.jpg?v=1764645939)
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Shipping Estimate
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
fischer FFB-VS 25 401-450 VentiStop Cavity Barrier [521528]FFB VS 25 401 450 is a foil faced stone wool pre cut unit with a powerful intumescent graphite strip that is bonded to the exposed face. The intumescent graphite strip is pre wrapped with a durable polythene adhesive sheet to prevent water ingress. FFB VS is designed to provide a 25 and 50 mm ventilation gap that allows air flow and moisture to pass down the back of the cladding. In the event of a fire, the intumescent graphite strip expands
![fischer FFB-VS 25 401-450 VentiStop Cavity Barrier [521528]](https://cdn.shopify.com/s/files/1/0657/4496/1700/files/Fischer_FFB-VS_app5_1d74f0bc-1e2b-4e28-af77-1cc85092b950.jpg?v=1764648005)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.9 ★★★★★
Based on 849 reviews
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Product Reviews
★★★★★ 5
Great polos at a great price
Color: Blue/White, Size: Large
Pleasantly surprised at the quality of these shirts. A bit heavier of a fabric then I anticipated but will be perfect for spring and fall. The size (large) was in fact large. :)
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Reviewed in the United States on March 8, 2026
★★★★★ 1
Avoid. Very thick
Color: Black/Red, Size: Large
Avoid. This is a thick shirt. Can’t wear during summer
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Reviewed in the United States on November 21, 2025
★★★★★ 5
Nice shirt
Color: Blue/White, Size: X-Large
Nice shirt
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Reviewed in the United States on April 16, 2026
★★★★★ 5
A good find
I liked the style of the buttonless collar. I have 3 that have become my favorite shirts because they fit well, the fabric is soft, light and comfortable in humid Florida.
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Reviewed in the United States on December 8, 2025
★★★★★ 5
Very nice shirt
Size: X-Large, Color: Grey Stripe
Really nice feel & look!
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Reviewed in the United States on May 23, 2026
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