there are roughly two categories: dry glue water and silicone glue! When bonding with dry glue, the silica gel needs to be pre-treated (there is a special silica gel bonding treatment agent and volatile solvent, and the silica gel is sprayed, brushed or soaked and then dried for 3 to 5 minutes), and then bonded with dry glue! The advantage of dry glue bonding is that it can be bonded immediately, and it is suitable for small-area silica gel bonding. The disadvantage is that it can't be soaked in water for a long time, and it can withstand temperature-4 to 8 degrees. After the glue is completely cured, it becomes hard and brittle! The second type of silicone glue is divided into two types: 1. One-component RTV room temperature vulcanized silicone rubber adhesive, paste, semi-flowing, slow-drying type, 1 minutes clock drying, 24 hours complete curing! 2.AB two-component HTV heat-cured silicone rubber adhesive, pasty, semi-flowing, heat-cured and quick-drying. Mix the glue in proportion, and complete the bonding operation with the help of special heating and curing equipment. The curing time varies from 5 seconds to 2 seconds (the curing time depends on the thickness, diameter and size of the silica gel product). After this kind of glue is completely cured, it is elastic, soft, waterproof and resistant to temperature above -6 to 2 degrees.