Experts in the development and manufacture of

fire stopping and cavity barrier systems

FSi are the largest manufacturer of passive fire protection products in the UK and we are proud to be part of the Etex group – the UKs leading source of drywall, steel framing and fire protection solutions.

Partnering with Etex protects your business and your reputation. From early design advice and installation quality checks to simplifying procurement, training and supply, we cut down risk and help your team operate with more certainty and confidence at every phase of a project.

All Under One Roof

In a complex, fast-changing world, you need innovative construction solutions that offer both performance and peace of mind. Delivered by a partner who will support you throughout the project, from design to installation and beyond.
Etex is the one-stop source for Siniat drywall, Promat fire protection, EOS steel framing and FSi fire stopping.

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Trusted fire Stopping Experts

Leave No Gaps

Product Development & Testing – Leave No Gaps

With in-house R&D facilities and a rigorous testing plan, FSi puts our reputation for product performance at the heart of everything we do.

Our products are tested to international standards and carry Third Party Certification, giving peace of mind to our customers whenever they specify and install our products & systems.

We understand the importance of working with our customers to innovate new solutions to real-life applications, which sees us continuously increasing the scope of application of our products and systems.

Technical Support – Leave No Gaps

Over the last two decades FSi has built a team with vast experience and knowledge in both fire stopping and cavity barriers. As the industry has grown, so too has our resource and ability to offer accurate, swift technical support and solutions for the ever-changing requirements of the fire protection market.

Our dedicated technical team are on hand to give you expert advice when you need it.  Plus all of our datasheets and certificates are available on the website, and you can now use the product selector app to make finding the right products and details for the job easier than ever before.

Customer Service – Leave No Gaps

Our outstanding customer service and logistical expertise set FSi apart from the competition.  With deliveries fulfilled by our in-house distribution team – Firesafe & Sound Ltd (FSS); you can trust FSi to seamlessly manage your orders and get products to site when you need them.

We offer next day delivery on our passive fire protection range, and industry leading lead times on our bespoke open state cavity barriers.  Or same day collections are available from our warehouse in Grays, Essex.  Contact the team to find out more: or call 01708 890524.



Manufacturing – Leave No Gaps

As the largest UK manufacturer of passive fire protection products, FSi are ISO 9001 accredited and have the benefit of managing our own supply chain; from raw materials, through production and a series of strict quality procedures, and then into our distribution hub at Firesafe & Sound in Essex.

FSi’s manufacturing expertise and control of product quality and consistency, stock levels and lead times means you can rely on us to supply quality products every time.


Starting from humble beginnings in 2000, and with thanks to our loyal customer base, FSi has progressively evolved into one of the largest manufacturers and brands of fire stopping and cavity barriers in Europe.

Since joining the Etex group in 2020, FSi have gone from strength to strength.  Benefiting from a global network of support and fire protection expertise, whilst still maintaining the trusted knowledge, service and support that our customers love.

We are proud of where we have been on this journey and look forward to where it will take us.  The culture and ethos of hard work, commitment, partnerships and honesty have always been at the core of what we do.


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