The father of managing director Gwain Paterson, 55, started this business in 1979 in a small Birmingham factory. It now has three UK manufacturing sites producing components for insulated glass, such as spacer bars, decorative film and adhesive lead, which it exports to 27 countries. A focus on the Far East helped overseas sales hit £2.8m in 2016.

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Company details
Year2018
Rank41
CompanyThermoseal Group
ActivityInsulated glass parts supplier
LocationBirmingham
2-yr av intl sales growth pa79.46%
International sales £000s2,751
Total sales £000s26,020
Staff132
Founded1979
Websitewww.thermosealgroup.com

If applicable:

* Supplied by company † Annualised figure