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18mm Marine Plywood

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902 reviews
Rated 4.7 out of 5 stars
5 stars
(755)
4 stars
(84)
3 stars
(14)
2 stars
(13)
1 star
(36)
£122.40 Inc. VAT
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mm
Min: 100mmMax: 2440mm
mm
Min: 50mmMax: 1220mm

Approximate Weight: 64.00 g

Free delivery when you spend £250+

Estimated delivery: from Check My Postcode

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£122.40 Inc. VAT
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Marine Ply Board Specifications

Material Plywood
Finish Marine
Thickness 9mm12mm15mm18mm25mm
Maximum Sheet Size 2420mm x 1220mm
Minimum Sheet Size 100mm x 50mm
Plywood Grade BB/BB
Manufacturers Tolerances +/- 10 % plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Cutting Tolerances +/- 1mm

Frequently Asked Questions

What thickness of plywood do I need?

When deciding on the appropriate hardwood plywood thickness, consider the specific application to ensure optimal performance.

  • For intricate crafts and hobby projects, a thinner option, such as 4mm plywood, is well-suited.
  • If you're working on cabinet backs, a 6mm plywood sheet provides the necessary stability.
  • For furniture construction and shelving projects, opt for either 9mm or 12mm plywood, depending on the specific load-bearing requirements.
  • When durability is paramount, especially in applications like flooring, subfloors, or heavy-duty uses, it is advisable to select a sturdier option such as 18mm plywood.

Is marine plywood waterproof?

Marine plywood is not waterproof, however, it has a negligible core gap so that the likelihood of water getting trapped between the layers is minimised. This provides a strong and stable glue bond for extra strength.

How is marine plywood different from regular plywood?

Compared to standard plywood, marine plywood uses higher quality wood, more layers, has a more durable adhesive, and is designed to resist delaminating and warping when exposed to moisture over time. Regular plywood is not suitable for prolonged wet conditions.

What is the best way to seal marine plywood?

Since marine plywood is typically used around or in water, you’ll need to treat every surface of the wood with sealant. You can find a good waterproof penetrating epoxy to be ideal as it works deep into the wood, dries transparent, and requires less maintenance than other types of sealant.

Do you need marine-grade plywood?

We recommend marine-grade plywood around any instance where your sheet is going to be near water.

How long does marine plywood last?

When properly maintained, marine plywood can last over 25 years even with constant water exposure. Also, proper sealing and painting helps to extend its lifespan.

Is marine plywood treated with chemicals?

No, marine plywood is not chemically treated. It achieves its water resistance through the use of durable face and core veneers, resistant adhesives, and multiple laminated layers.

Delivery depends on the size of your order

Reviews

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4.7 / 5 902 reviews
Peter F., 20th November
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The best quality I have used. Am very pleased.
Verified, Collected by Cut My
Elizabeth Grisdale, 20th November
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The plywood is always top rate never warped or dented
Verified, Collected by Cut My
Robert Potter, 19th November
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Professional job
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Geoff Rowntree, 4th November
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Very good service, and nicely cut. Did the job perfectly! Many thanks
Verified, Collected by Cut My
LoisLogs, 30th October
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I ordered 6x replacement seat inserts for my dining chairs. Ease of ordering and quick delivery was appreciated. The only limitation was that my seats need a radius corner, and because they're not square, the additional cost to add this feature seemed disproportionately high. I do understand that machines need setting up etc but it became unaffordable. Instead I ordered them all with pointy corners, and I've rounded the relevant ones off myself with the coping saw and sand paper. Time consuming, but cheaper! Otherwise great new seat inserts, now awaiting their upholstery!
Verified, Collected by Cut My
Arai Takashi, 28th October
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Too late . And missing stuff takes 3 weeks to get
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Anthony S, 27th October
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Nicely made and good quality material. Fitted together well
Verified, Collected by Cut My
Natalie A., 27th October
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Great item! Highly recommend.
Verified, Collected by Cut My
VB, 26th October
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Beautiful ply. Accurately cut to my required sizes. Speedy and very friendly delivery. Highly recommend.
Verified, Collected by Cut My
Susan Lally, 26th October
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Delivered on time and a perfect fit.
Verified, Collected by Cut My
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