Cressi Sub mastic is a black quick-drying glue used by Cressi for decades for all types of Neoprene gluing, diving or for all kinds of neoprene to repair.
Made in Italy with a specific composition for neoprene presented in tubes of 30g. To paste the neoprene, clean and dry both sides to join. Put a coat of glue and let dry for 5-10 minutes until it becomes thick. For major repairs or particularly delicate ones, apply a second coat after drying of first. Apply an outer coat to strengthen bonding once done, the tail acts as a solvent diluted.