Red Devil OneTime High performance caulk and professional acrylic sealant. This is a flexible filler and has excellent joint movement capability +/- 12% and has a 12 year guarantee. Resistant to mould this filler / sealant can be applied to internally or externally and will adhere to most surfaces. Ideal for filling and sealing cracks and gaps in brickwork, stones, concrete and between skirting board and walls, around window frames, architraves, cornices, PVC profile trims and cladding. Not suitable on PF, PP, Teflon and bituminous surfaces. This product should not be used below ground level.