Expandafoam Open Cell - Polyurethane Foam Backing Rod

Low density, open cell polyurethane foam backing rod supplied in circular section cords of varying diameters. Primarily used in expansion joints which are to be subsequently sealed with one component polyurethane and similar sealants. Compatible with all elastomeric sealants. Open cell structure allows greater air contact with joint sealants resulting in faster cure rate of single component joint sealants. Readily compressible - each size accommodates a wide range of joint sizes. Low load transfer. CFC free.