Backer foam, backer rod, caulking, cork, corking, filler foam, joint backer, it’s called many a different name, but whatever you call it, it’s basically the same thing! Based in the Middle of the country, for many years Celltex have been market leaders in the supply of all types of compressed, foam joint fillers, sealing strips suitable for backing out gaps & joints, create airtightness, acoustics and thermal insulation. Celltex often work closely with architects, specifiers, civil engineers, builders and distributors, to achieve the right solution to bespoke projects. We stock the most relevant products to the industry we’re in, both square section and round rod foam.