Thompsons One Coat Damp Seal: The Ultimate Solution for Damp Problems Thompsons One Coat Damp Seal: The Ultimate Solution for Damp Problems If... Thompson's One Coat Stain Block Damp Seal provides a complete solution for sealing damp walls before decorating. This 2.5 litre tin is supplied with a resealable lid for convenient storage. Features: One coat application for efficiency. Effectively blocks stains. Seals damp walls. Resealable lid for easy storage. Specifications: Brand: Ronseal MPN: 34579 EAN: 5010214845798 Size: 2.5 Litre The Thompsons RSLTOCDS25L is supplied in a tin with a re-sealable lid. Micro-porous formulation allows trapped moisture to escape. Can be applied directly to damp surfaces and permanently stops the reappearance of stains. Weight: 7.605948039 Pounds. Manufacturer: Ronseal.