Everbuild Bath & Sanitary Silicone Sealant 500 - Everbuild 500IV, 500 Bath & Sanitary Silicone is a premium quality high modulus acetoxy cure silicone sealant that contains a high level of powerful anti-fungal compound to prevent mould and fungal growth. Typically used in areas of high humidity, such as bathrooms, toilets, showers and kitchens in both commercial and domestic applications.