Heat strengthening furnace


Located in our 30,000 sqft factory in Cambridgeshire, our state-of-the-art Cooltemper furnace toughens glass for a variety of uses. Our toughened glass is certified and accredited to EN 12150: 2004 for toughened glass.

Get In Touch


Our technical in-house expertise enables us to offer toughened safety glass that can be utilised in a variety of different ways, to make commercial buildings safer with the qualities that our toughened glass offers.


Partnered with all the major glass and consumable suppliers, this enables our highly skilled team to consistently utilize the latest glass toughening technology and provide low cost toughened glass solutions that are fully tested, and CMS marked to EN 12150: 2004.

Discuss Your Project

Discuss your project

Simply enter your details & project brief below and one of the Holloseal team will be in touch shortly.

By submitting your details you confirm that you agree to the storing and processing of your personal data by Holloseal as described in the privacy statement.

Technical Information

A transparent and technically sound manufacturing process is incredibly important to us at Holloseal. Have a browse through our brochures and compliancy documents to understand why we are one of the UK's leading toughened glass manufacturers and suppliers.

View Downloads

Latest Projects

With a clear vision of the perfect sealed unit firmly within our sights, our extensive technical expertise allows us to confidently exceed expectations showcased via a diverse collection of architectural glazing projects - from ground-level treatments to bespoke curtain walling.

View Projects

Our Partners we work with ....

Guardian Glass
Asahi Glass Company
Saint Gobain