OB1 Diamond Crystal Clear Universal Sealant & Adhesive is a high-quality, hybrid-based, phthalate, tin and solvent-free formula that cures to a durable, crystal clear elastic rubber, for interior and exterior use. Features: Crystal Clear Finish High UV Resistance Multi-functional Sealant and Adhesive Phthalate-Free, Tin-Free, Solvent-Free Durable & Elastic Interior & Exterior Use* Colour: Crystal Clear Size: 290ml Everything you need to know about OB1 Diamond Crystal Clear Universal Sealant & Adhesive OB1 Diamond Crystal Clear is a high-quality, hybrid-based sealant and adhesive that cures under the influence of humidity to form a durable, crystal clear elastic rubber. Its phthalate-free, tin-free and solvent-free formulation makes it a cleaner option for both sealing and bonding applications. As a multi-functional product, it works as both a sealant and an adhesive, giving installers a single tube for jobs that need a clear, near-invisible finish — useful anywhere a coloured sealant would be visually distracting, such as glass, mirrors and clear or light-coloured surfaces. It offers high UV resistance for a clear sealant, though we recommend avoiding direct, prolonged UV exposure when used outdoors to help maintain its clarity and performance over time. Supplied in 290ml cartridges, OB1 Diamond Crystal Clear Universal Sealant & Adhesive gives tilers and installers a dependable, virtually invisible sealing and bonding solution for interior and exterior work. *OB1 Diamond Universal Sealant Crystal Clear has a high resistance against UV, however we recommend when using this product outside to avoid direct UV exposure.