Check the listing for details. LIGHT GRAY | KeelShield (3M) Hull Protector, 8 ft. | 8LG. Condition: New. Listed at 230.72 USD. KeelShield® brand keel protectors provide the strongest most durable protection for your fiberglass or aluminum boat’s hull. This 5” wide tough shield protects your keel from docks, concrete ramps, rocky shores, launching, retrieving, beaching, sandbars and other hazards that can quickly damage it. In addition to increasing your boat’s resale value and protecting your investment, few scars, scratches and dings mean less water friction and better performance. Speed tests prove we won’t slow your boat down. Made of urethane polymers – not plastic, PVC or PVC based Polycore – KeelShield comes ready to install with a 3M pressure-sensitive high-performance adhesive system that is nearly twice as thick as any others on the market.