Water Based Glue in 90ml bottle. Free Chack Glue is completely free from organic solvents and made from 100% Liquidized natural caoutchouc (natural rubber). After a short drying period, it sticks the sponge and the blade surface together perfectly. It is also very easy to remove the rubber from the blade and to peel off the remaining glue from the sponge. Comes with Applicator clip and sponges.