About Us


Kelvin Composites Limited is a family run business based in East Kilbride. We manufacture and supply quality glass reinforced plastic (GRP) housings and related products to customers throughout the UK. With over 20 years’ experience in the GRP industry we are one of the leading manufacturers of industrial GRP products.

Glass-reinforced plastic or GRP is a fibre reinforced polymer made of a plastic matrix reinforced by fine fibres of glass. It is a lightweight, strong, robust material and less stiff and brittle than carbon fibre. GRP’s bulk strength and weight properties are also very favourable when compared to traditional metal alternatives