Pro Flex is designed to out perform polyurethanes and silicones without the inconvenience of extra preparation. Has a life expectancy of over 50 years. Easy to apply and adheres to all building materials even when wet or oily. Stretches and recovers to its original shape better than other sealants. Pro Flex has superior adhesion to any surface, yet cleans up easily. Paintable when cured. 10 oz. cartridge.