Armacell is a manufacturer and supplier of industrial foams and flexible insulation materials, based in Luxembourg.

[3][4] Armacell was the insulator manufacturing division of Armstrong World Industries, until a management buyout in June 2000.

In 1954, the division experienced success after launching Armaflex, a flexible technical insulator for pipe connections.

[8] In 1984, Swiss company Rothrist and its brand Tubolit were taken-over, adding insulations based on polyethylene to the range of products.

In June 2000, the insulation division became independent company Armacell International Holding, with all rights to Armaflex and Tubolit.