Leech Adhesives created a superior Silicone Rubber Sealant that uses the Room Temperature Vulcanizing Process (RTV). It is perfect for interior and exterior sealing and caulking. This gives our sealant excellent flowability, low shrinkage, along with exceptional aging resistance when sealing windows, doors, tubs, showers, counters, baseboards and A/C units. The Leech Adhesives Silicone Rubber Sealant can also be used on RVs, boats and automobiles. When you want to seal it right “Stick with Leech”