Check the listing for details. Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass.... Condition: New. Listed at 51.59 USD. TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair. Item Form Putty. Special Feature Superior Bonding Strength and Elasticity, Versatile Use, High-Strength Marine Bonding, Excellent Impact ResistanceSuperior Bonding Strength and Elasticity, Versatile Use, High-Strength Marine Bonding, Excellent Impact Resistance.