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01277 525 020





Specialist Sealant Company UK

The Best Contractors For Silicone Services.

GT Sealants offer the complete solution to all your mastic sealant works. We work closely with all our clients from the beginning to the very end to ensure their projects are completed on time and to the highest specification.

Are you looking for a mastic sealant contractors in London or Essex?

Sealant & Mastic Services.

GT Sealants are a reliable Mastic Sealant Company near you offering our services throughout the UK. Our mastic sealant contractors cover all aspects of mastic sealant works for commercial, industrial and residential properties.

We always deliver.

If our clients need a sealant specialist to carry out their domestic works or a team to carry out Hi Specification commercial projects, GT Sealants always deliver.

Internal silicone – Bathrooms, kitchen, window frames etc.
External silicone – Window frames, Brickwork expansion joints etc.
Fire rated sealants – Block work, soffits etc.
Concrete floor joint – Car parks, roads, perimeter of buildings etc.
Structural glass sealants – Curtain wall, glass to glass etc.
Anti-pick sealants – Prisons, secure units etc.
Healthcare buildings – Use of anti-bacterial silicone
Air testing sealants – Complete air tightness achieved for new build
We only use anti-fungal silicone in wet areas to guarantee mould prevention


GT Sealants have years of experience planning, managing and executing construction projects of all kinds. Our team is professional and reliable and they will work within your constraints.

Jean Michel
Classique Trading, 16th March 2021
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The main contractor is very happy with mastic works being carried out. Your operative is doing a brilliant job here at BAM site in Kings Cross. It is really appreciated and helps us achieve an excellent finish.
Billericay, 30th Jan 2021
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Very Responsive to our message, came very next day and did a great job… Will be calling again
Tom McCarthy
Westbourne Homes, 9th December 2020
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On behalf of the Westbourne Team I would like to thank you all for your efforts in 2020. We are proud to announce that in October we won Best Family Home Over £1.5m at the prestigious Evening Standard Awards for Highgrove, Hambledeon Place (plot 2 Upper Paddock). Up against some very impressive competition, in London and up and down the country. This award is a testament to the quality of workmanship on site by all.
One Blackfriars Tower
Commercial & Industrial
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GT Sealants will be starting the internal silicone at one Blackfriars tower in June 2016.
This is set to be a beacon of architectural brilliance rising 50 Storeys. Properties will be worth between £1.1million and £23 million.
Katy Andrews
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Very responsive to messages came the very next day and did a great job was done within half an hour.
Thanks again will be calling again when it needs redoing.

Our recent projects.

GT Sealants have worked with the some of the biggest building contractors in the country, all of whom are repeat customers. We realise that a reliable and quality mastic man can make all the difference. If your client demands the highest standard of finish, GT Sealants really are the company for you.

Our Accreditations.

Get in touch.