DAP® Silicone Ultra is a premium performance 100% silicone sealant that provides maximum flexibility and adhesion to withstand extreme expansion and contraction caused by temperature and weather fluctuations. DAP® Silicone Ultra has twice the joint movement capability of many other sealants so it won’t crack or shrink, providing a durable, permanent 100% waterproof and weatherproof seal. It is water resistant in 30 minutes. Cured sealant is mould and mildew resistant. Ideal for a wide variety of interior and exterior applications such as sealing around windows, doors, siding and trim. Backed by a Lifetime Guarantee. Meets ASTM C920, Class 50 uses G, A & O.
Remove any old caulk from the seam or joint by cutting or scraping it away. Then clean the area with soap and water to remove dirt, dust, grease or debris. Rinse thoroughly. Make sure the area to be sealed is clean and dry to ensure good adhesion.
Want straight lines?
Apply painter’s masking tape to either side of the joint before applying the sealant. Remove the tape before the sealant skins over – about 2-5 minutes. To remove, lift the edge up at a 45° angle and pull away from you.
Get a Professional-Looking Finish
To get a professional-looking finish after the sealant has been applied, smooth the bead of sealant with a caulk finishing tool dipped in water. Do this before the sealant starts to skin over, about 2-5 minutes.