XTR-311 is a high bond, water clear epoxy adhesive that rivals HXTAL in purity, ease of use and workability. XTR-311 is a two part epoxy mixed by weight 10:3. The cure time runs about 18 hours in room temperature and can be worked after 24 hours. Mainly used for flat glass lamination. XTR-311 does not yellow or amber over time with exposure to UV light. We use this adhesive in our shop and I think it's fantastic. When mixed, the XTR-311 is extremely thin and easy to work with. It will double its thickness in about an hour and half and exponentially from there. Unused portions can be frozen for short periods and re-used. Please be aware that liquids cannot be shipped through the Postal Service. You must choose either UPS or FedEx for adhesive shipments.