Marine Plywood
Marine Plywood Sheets for Cabinetry, Joinery, Subfloors, Boats
Building a boat, fitting out a wet area, or working somewhere timber has to survive constant moisture? Marine plywood is the grade for it, bonded to hold together where standard ply would delaminate. We stock marine ply in 2440×1220 sheets from 4mm right up to 25mm, made from selected Hoop Pine to FSC/PEFC certification and bonded with a permanent Type A phenolic glue line. Whether it is a thin 4mm sheet for a curved panel or 25mm for a structural marine job, you get a dense, void-free sheet that stands up to water, fungus, and borers.
What Makes It Marine Grade
The difference is in the bond and the core. Marine ply uses a Type A phenolic bond, the permanent glue line that keeps the veneers locked together under heat, moisture, and load, so the sheet will not delaminate or separate where exposed ply would fail. The plies are laid perpendicular and pressed under heat and pressure, and the sheet is manufactured free of the gaps and voids found in lower grades, so it stays sturdy after sawing and holds an edge cleanly. That construction is what makes it water, fungus, and moisture resistant, and what protects it against wood borers and marine organisms.
Where Marine Plywood Is Used
Its resistance to water and humidity puts it well beyond boat building, though it remains the standard for hulls, decks, and docks. It suits outdoor furniture, patios, and porches in coastal and high-humidity settings, and works as flooring, siding, or backsplash in bathrooms and kitchens where moisture is constant. Because it resists delamination even under heat, it is also used in heat exchangers, cooling towers, signboards, and portable shelters exposed to severe weather. Sealing the cut edges keeps the moisture resistance intact, so pair it with a construction sealant on exposed edges, and see the full timber sheets range for structural and interior sheet options.
Marine Ply in Every Thickness, Delivered
- 4mm to 25mm in 2440×1220 sheets: A full thickness range for thin panels through to structural marine work.
- Type A phenolic bond, Hoop Pine: FSC/PEFC certified, void-free, water and borer resistant for genuine marine use.
- Delivered across Sydney: Sydney, the Blue Mountains, Wollongong, and the Central Coast, or click and collect from Arndell Park.
- Australian-owned family business: Western Sydney based. Real people, real stock, real advice.
Whatever the water throws at it, from a bathroom floor to a boat hull, we’ve got the sheet for it.
Call 1300 554 775 or request a quote online and our team will help match the thickness to your job.
Frequently Asked Questions
What is marine plywood?
Marine plywood is a high-grade exterior ply made from selected timbers like Hoop Pine and bonded with a permanent Type A phenolic glue line. It is manufactured void-free so it resists water, fungus, and delamination, which is why it is used for boats and wet-area work.
What is the difference between marine plywood and regular plywood?
Marine ply uses a Type A phenolic bond and a void-free core, so it holds together under constant moisture and heat where standard ply would delaminate. Regular exterior ply is not built to survive the sustained wet exposure marine ply is made for.
Is marine plywood waterproof?
Marine plywood is highly water and moisture resistant thanks to its phenolic bond, but the timber itself still benefits from sealing, especially on cut edges. Sealing exposed edges keeps the moisture resistance intact over the long term.
What thickness marine plywood do I need?
BBS stocks marine ply from 4mm to 25mm in 2440×1220 sheets. Thin sheets suit curved panels and linings, while thicker sheets handle structural and load-bearing marine work. Call 1300 554 775 to match thickness to your job.
Can marine plywood be used in bathrooms and kitchens?
Yes. Its water and fungus resistance makes it suitable for bathroom flooring, siding, and backsplashes, and for kitchen shelving and flooring, wherever moisture exposure is constant.