Silicon Sealant prevents water leaks around the home by providing a water-tight barrier. This high-grade multipurpose co-polymer sealant is quick and easy to apply, giving a clear and unobtrusive finish.It is well-suited to exterior applications, such as window frames and glazing around skylights, roofs and gutters or sealing metal or PVC downpipes, and air conditioners’ entries and can even be used to seal wet non-porous surfaces such as metal, so you can deal with that leak fast.