Shower trays are usually made of fiberglass because it is a lightweight and durable material. Fiberglass also contains water and moisture as well if the surface has not been compromised. The most common problem that occurs with shower trays is that with use and the application of cleaning chemicals they can become cracked. If this happens, they can leak, causing damage to bathroom flooring and other parts of the home. You can repair a shower tray using the proper materials and procedure.
Cut the fabric from the kit into strips large enough to cover the area being repaired and a half-inch beyond it in all directions. Use a pair of scissors to cut the fabric. Cut three strips for each area being repaired.