This vapour retarder is composed of modified SBS asphalt with a top surface of high density cross laminated polyethylene film. This product is designed as a vapour retarder before the installation of the roof system. SKU: 1101600 Documents and technical files Select all Data sheets MVP - (Modified Vapour Protector) Vapour Retarder Open SDS MVP - (Modified Vapour Protector) Vapour Retarder Open Add to my folder