Universal Silicone: It’s an anti-mould silicone sealant, one-component acetic crosslinking, elastic and waterproof. Lasting resistance to weather and most chemicals. Excellent sealant, insulator and adhesive for glass, ceramic, steel, aluminium. Ideal for sealing sanitary ware, bathtubs, shower enclosures, wash basins, tiles, windows and frames, skylights, air conditioning systems etc…Not over-paintable.