Get the most ideal binding adhesive from Coverbind for your softcover paperback books, manuals, and much more. Coverbind Perfect book binding glue is a hot melt adhesive for the binding that gets stronger as it dries. To ensure a durable finish, this premium perfect bind glue provides a firm but flexible hold. This binding glue comes in 5-30 lb. bags and works with either the CPB1 or CPB2SG perfect binders, making it highly flexible.