Amazon.com: Foam Insulation Neoprene Sheets with Adhesive,Multi-Function Soundproof Large Marine Closed Cell Neoprene Rubber Roll (W:12 Inch T:1/2 Inch L:59 Inch,Black) : Industrial & Scientific
Armacell ArmaPET Struct Structural Foam Board – East Marine Asia
Amazon.com: TotalBoat Flotation Foam - 2 Part Expanding Polyurethane Marine Pour Foam for Boat Floatation, Insulation and Soundproofing (2 LB Density, 2 Gallon Kit) : Sports & Outdoors
HDPE Marine Board, Marine Grade Plastic Sheet, Various Sizes and Colors, | eBay
SpaceAge Versatile Series 24 lb. Thermo-Lite Board® | Merritt Supply Wholesale Marine industry
White PVC Celuka Foam Board/Sheet Boat Decking Material for Wall Panel
Foam Core Panel, PE Structural 13mm 3.75'x7.50' - Budget Marine