Silicone rubber rings can be bonded together to form a simple bracelet, including KN-300 silicone rubber glue, which is suitable for slow dry bonding at room temperature, fixed for half an hour, and can be made into a bracelet after 24 hours. Compared with 406 instant bonding, it has the advantage of direct bonding, but the time is slower. Instant bonding needs to treat the surface of silica gel to achieve better bonding effect.