No, builder gel cannot be used as a nail glue. Builder gel is a type of gel used for creating and building up the structure of artificial nails. It is typically applied over a nail form or nail tip to extend the length of the nail and create a strong, durable base.

Nail glue, on the other hand, is specifically formulated to bond natural nails to artificial nails or nail extensions. It is designed to provide a strong and secure hold, allowing the artificial nails to stay in place for an extended period of time. Nail glue is typically a cyanoacrylate-based adhesive, which forms a strong bond when it comes into contact with air.

Using builder gel as a nail glue may not provide the same level of adhesion and longevity as a dedicated nail glue. It is always recommended to use the appropriate products for their intended purposes to ensure the best results and the safety of your nails.