A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Fiberglass mat material reinforced with long, fiberglass strands. Used to reinforce fiberglass, polyester, and epoxy resins where bulk and waterproofing is required. Use for the repair of holes and badly damaged areas in fiberglass, metals, and plastics. Easy to handle on flat or curved surfaces. May be used with or tape to build layers of laminate.