Selleys Roof and Gutter Silicone is a neutral (non-acid) cure 100% silicone sealant for most building surfaces including metals, tile, cement sheeting, PVC and COLORBO roofing. It is available in a range of colours to match your roof and gutters. UV and weather resistant Immune to the damaging effects of the sun. 100% silicone means the water is locked out by forming a durable seal and does not shrink when drying. Non corrosive neutral cure formula. Excellent general purpose sealant. Will not attack zinc or cementious surfaces, which can lead to poor adhesion of acid curing type silicone sealants. Has superior flexibility +/- 25% movement capability & up to 400% elongation or stretch. Superior adhesion to a broad range of surfaces, resulting in a lasting finish. Temperature resistance approximately -60C +150C Has a 25 year guarantee when used as directed, i.e. for private use and within 12 months of purchase, the product is guaranteed against crumbling, cracking or drying