Thompson's Damp Seal White 250ml is a stain-blocking treatment intended for suitably prepared walls and ceilings affected by damp staining. Its microporous formulation is designed to allow moisture vapour to escape while covering existing marks.
Suitable for subsequent painting or wallpapering when fully dry, subject to the manufacturer's guidance. Identify and remedy the source of any ongoing damp before redecorating. Follow the instructions on the pack for application and drying times.