How to pour expanding flotation foam in a boat hull - How to Build a Boat Part 10 - YouTube
Pour Foam - 2 Lb Density - 2 Gallon Kit - Tiny Boat Nation
4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit): Amazon.com: Industrial & Scientific