1. Materials Required Before starting make sure you have everything to hand. We suggest the following: 1. Soft Paper Toweling 4. Tub of Water 2. Masking Tape 5. Plastic Smoother / Spreader 3. Strong Sticky Tape 6. Silicone Sealant & Gun Good quality waterproof silicone can be purchased at many hardware stores - some stickier than others.