Waterproof "floating" silicone effectively fills even invisible and hard-to-reach gaps around windows and skylights. Excellent for repairing door and window seals and window frames. It can also be used to seal parts that are in direct contact with water (e.g. boats. aquariums. swimming pools). Dries in an hour. Creates a flexible. durable. waterproof seal. that is resistant to vibration. extreme temperatures and weather conditions. Bonds glass. rubber. plastic. wood. concrete and more.