Butterflys Free Chack II Table Tennis Racket Glue is a newly formulated, water-based adhesive designed to help you assemble your table tennis rubber to the wooden blade. The Free Chack II is specifically designed for Butterflys Spring Sponge and Spring Sponge X rubbers, which includes the Dignics, Tenergy, and Spin Art model lines. Spring Sponge rubbers provide table tennis players the sense of catching balls. Like a spring coil, the Spring Sponge absorbs the incoming energy of the ball and releases it as additional power for the players own shot. Rubbers with Spring Sponge technology enable shots with high amounts of spin. Furthermore, the Free Chack II allows easy removal of excess glue from the sponge and blade surface when players want to switch out rubbers. Free Chack II provides a stronger bond than regular Free Chack glue does and it is very easy to use! Simply apply the glue evenly on the blade and on the back of the rubber sheet. When the glue dries clear, apply the rubber to the blade. Gently press and roll the rubber on the blade. Finally, cut the excess rubber around the edges of the racket. You now have assembled your very own table tennis racket!