EVERFLEX ONE HOUR CAULK is a fast drying flexible decorators filler and sealant which can be overpainted with all paint types, or covered over with wallpaper. No sanding down is required.Benefits Fast drying - can be over-painted in 1 hour. Permanently flexible. Easy water clean up. Excellent slump resistance. Certified to the harmonized European standard EN15651 for facade use internally in compliance with the Construction Product Regulation.Areas For Use For sealing and filling cracks and gaps prior to decorating. For use around skirting boards, ceiling cornices, window and door frames, stair treads and risings and fixtures adjoining walls. Can be used to fill damage plaster.Limitations Not for use in conjunction with bitumen or asphalt. Do not attempt to abrade when cured. Do not over-paint until a surface skin has formed. Note: this product is a flexible. Certain poor quality paints (especially certain vinyl matts) have very little movement in the dry film. It is possible for the dry paint film to crack if movement is excessive. For internal use onlySurface PreparationAll surfaces must be clean, dry and dust free. All loose or flaking surface coatings, and old sealant and mastic joints, should be removed before application. Highly porous substrates such as new plaster should first be primed with a dilution of Caulk with water at a ratio of 1:2. Can be applied to slightly damp surfaces.ApplicationCut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut cleanly at an angle of 45 with an opening slightly larger than the gap to be sealed. Apply using a standard sealant gun. Best results will be obtained by keeping an even pressure on the gun trigger and keeping the gun at a constant angle to the surface being sealed. Smooth down within 20 minutes of application using a wet spatula, piece of wood or wet finger. Care should be taken at this point not to saturate the surface as this will d.