What is marine-grade plywood?
Marine plywood is good-quality, hardwood plywood that is made using waterproof glue. These factors are what make this plywood acceptable for building boats and boat parts. Marine plywood is not waterproof, and it is not rot-resistant or treated with any chemicals.
The main benefit that makes marine plywood great for boat usage is that it is made with waterproof glue. If the plywood gets exposed to moisture, humidity, or boiling temperatures the glue won’t break or separate therefore keeping the wood layers together.
Glues used in exterior and marine plywood are described as WBP (weather and boil proof.) Most of these glues will be either melamine or phenolic. Phenolic glue is generally more water-resistant and used in higher grade plywood whereas melamine is lower grade and will hit a boiling/melting point sooner than phenolic.
Popular Wood Products for Boats and Yachts
Exotics and Burls: Some popular exotic woods used for yachting are Anigre, Beech, Sapele, and Mappa Burl.
Teak: Teak has a closed-pore, oily texture, which makes it more water-resistant and overall very durable against natural elements.
Mohogany: Mohagany is made up mostly of heartwood, this makes it very dense and more resistant to rot and decay.
All wood products used for marine purposes will change color, decay eventually and have to be replaced. Choosing stronger products that are more water-resistant will delay this process.