silicone sealant: single-component, acetic cure at room temperature, waterproof, weatherproof, heat and freezing ... resistant. YA-688 silicone sealant is single-component, acetic cure, specially designed for all kinds of aquaria, fish ... sealing in ornamental engineering. Features: 1) single-component, de-acetic-acid cure at room temperature. 2) high tenacity and flexibility; fast ...