When making the glue, prepare crystal A and B glue, mix them evenly according to the ratio of 3:1, drop them directly into the mold, wait for three hours at normal room temperature to solidify, and demould Then it's ready. There are many types of glue, including soft crystal glue, hard crystal glue, curved glue, polished glue, PU glue, etc. The most common homemade glue is soft crystal glue and hard crystal glue. Soft crystal glue is a two-component liquid with high transparency and no shrinkage.