... waterproof, weatherproof, heat and freezing resistant. YA-688 silicone sealant is single-component, acetic cure, specially designed for all kinds of aquaria, fish ... 1) single-component, de-acetic-acid cure at room temperature. 2) high tenacity and flexibility; fast cure, ready to use. 3) superb ... ) excellent extensile adhesion to most architectural materials. YA-688 silicone sealant for aquarium