Monobond Radon Tape 70mm x 2mm x 15m Blue is a double-sided radon resisting butyl sealant tape designed for sealing joints in Monarflex RAC, Reflex Super, RMB400, RMB350 radon barrier membranes, and Easi-load™ Radon DPC. Rolls are 70mm x 2mm x 15m, are blue in colour with white release paper which bear the product name.