A hot melt glue gun is good or bad, leak gel content is an important evaluation factors. Have a good glue gun muzzle at the ball and spring design, in order to not pull the trigger, the ball can muzzle blocked to prevent glue leakage. This design glue gun, long standby leakage is very small and even, no such design cheap glue gun in a standby situation would have been a lot of leakage glue. 

 2, the leakage of rubber, and resin content, pull the trigger when the intensity is related to. In a sense, the glue gun will leak glue, look at how to understand the leakage glue. The glue does not leak, we are talking about refers to the long-term standby, heating part of the glue within the chamber has been completely melt is no longer a pressure increase within the chamber is full of glue and will not leak.