This is a generic term for all types of sealants. The silicone range is huge and you need to ensure you choose the right sealant for each different situation, and is best to leave it to the professionals.
Silicone is the predominate way of waterproofing roofing iron. The Your Local Plumber team is trained to use the right silicone and in the right way – for example, silicone should be used as a gasket rather that put on top or smeared onto a surface.
Silicone has an amazing ability to stretch either under expansion or contraction.