Ultra-Flex is a one component, medium modulus, neutral cure 100% silicone sealant and adhesive. The thicker formulation makes this product perfect for exterior construction applications. When fully cured, this unique VOC compliant formula offers UV stability and tenacious adhesion to pvc, concrete, glass, aluminum, painted surfaces, wood, plywood, stucco, building paper, window wrap, fiber cement, brick, stone, masonry plus many other common material surfaces. This product is specifically formulated to offer all weather performance to meet today’s Green Building Standards. Comes in 10.3 oz tube.