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18mm Moisture Resistant MDF

£2.00 Inc. VAT
Max: 2440mm
Max: 1220mm

Approximate Weight: 64.84 g

In Stock
£2.00 Inc. VAT

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We offer different types of MDF sheets for various projects and environments which can be cut to any size or shape using our CNC router for a high level of precision and repeatability. Whatever shape or design you have in mind, we can cut it – just send us your drawings, either in CAD format or as a sketch, and we can create it for you. CNC routers can also be used for rebating, pocketing and hole cutting on MDF sheets, as well as virtually any other sheet material. There is the option to add laser cutting, CNC engraving and mitred edges to your MDF sheeting too.

Using state-of-the-art UV printers, we can print full sheets of MDF in one go, providing a consistent finish at a much faster rate than painting. We currently only list 8x4 sheets (2440x1220mm) but we’re able to purchase and cut sheets of up to 2000x3000mm, so get in touch with our team today to discuss your requirements. With optional next day delivery, your products can be with you fast. For bigger orders, we have our own transport service which operates throughout most of the UK. If you have a larger ongoing project taking place, you can contact us to discuss bulk discounts and regular supply orders. 

18mm moisture-resistant MDF boards are designed to withstand humid and damp conditions while providing durability. This resilient material is made using a moisture-repelling resin which allows for greater resistance to humidity. This premium-grade MDF is perfectly suited to interior applications such as kitchens, bathrooms or utility rooms where standard MDF may lose its structural integrity over time. We provide cutting services that allow you to purchase the exact size and shape you require for your chosen project, as well as quick delivery so you can get started as soon as possible.


18mm Moisture Resistant MDF Uses

There are several different varieties of MDF, depending on the application you’re using it for.

  • Moisture-resistant grade MDF can be used in areas of homes or businesses where moisture or humidity is an issue, such as bathrooms, kitchens or storage areas.


Advantages of 18mm Moisture-Resistant MDF 

While moisture-resistant MDF is not the same as water-resistant – meaning it is still prone to swelling and warping if it comes into direct contact with the element – it will maintain its stability and strength in humid conditions. It’s an easy wood to work with, as it can be cut with a hand saw or power tools and takes well to glues, adhesives and screws. It’s also an easy material to fabricate and machine, so it can be laser cut or routed with ease. MDF is renowned for its smooth surface texture so it takes well to stains, paint and varnishes, as well as being the perfect base for laminates and veneers. MDF is easy to sand down and provides a smooth and professional finish – sanding also has the added benefit of sealing in the edges after cutting and machining which prevents harmful fibres from being released from the board.

MDF is an environmentally-friendly product as it’s made up of wood chippings, sawdust and recycled offcuts that have no other purpose and would otherwise be discarded. While different manufacturers include different quantities of recycled materials in their wood, this product is incredibly green and a great use of materials that would typically be thrown away. The advantage of choosing 18mm MDF over thinner varieties is that it’s less likely to bend or warp, so it’s a great option for applications that rely on this type of strength and rigidity. Our other popular sizes are 12mm MDF and 9mm MDF sheets.


Applications of 18mm Moisture Resistant MDF

18mm moisture-resistant MDF offers all of the advantages of MR MDF while also providing added stability and strength. It’s perfect for applications that require durability and structure such as shop fitting, doors or general joinery. This form of MDF is best-suited to bathrooms and kitchens, or for utility rooms and washrooms where moisture is present. For any environment where damp or humidity is an issue, this sheeting is the perfect material to use. It can be used for applications around the home but is just as popular for commercial environments such as bars, retail spaces and the food and drink industry, as well as being an affordable option for offices. We also offer fire retardant MDF.


Material Wood - MDF
Finish Moisture Resistant (Unfinished)
Available Thicknesses 6mm, 9mm, 12mm, 18mm
Maximum Sheet Size 2420mm x 1220mm
Minimum Sheet Size 100mm x 50mm
Fire Rating UK Class 1 Fire Rating
Moisture Content 0.5-0.8%
Manufacturers Tolerances +/- 10% plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Cutting Tolerances +/- 1mm

Manufacturer's Datasheets

For the full technical details, download the manufacturer's datasheet here:

Medite MR MDF

Frequently Asked Questions

What tolerance do you cut to?

We cut to a tolerance of +/-1mm.

What is your delivery timescale?

3-7 working days.

Is mirrored acrylic like normal mirror?

Mirrored acrylic is a flexible material, and needs to be attached to a perfectly flat surface. We recommend attaching it to MDF or something similar, making sure the adhesive is spread in a thin even layer across the acrylic. we also recommend using the 5mm thick acrylic as it is more rigid.

Can you cut any shape?

Yes, in acrylic. We will shortly be able to also cut any shape in polycarbonate as well.

What's your standard radius corner?

20mm, but we can cut to your requirements.

How many holes do I need in my acrylic?

1 per corner should be sufficient for smaller pieces. You might want to consider an extra hole in the middle if your sheet is larger.

Can I cut acrylic?

Yes, you can. Just take it slow and easy.

Can I put acrylic behind a hob?

Not if it is gas or electric. You need a gap of 5cm between an induction hob and the acrylic.

Do you fit the acrylic?

No, we don't. We do provide some templates which should help you to take your measurements. The acrylic is easy to install by any competent DIYer.

What's the difference between acrylic and Perspex?

Perspex is a brand name. It is the same as acrylic.

What's the difference between acrylic and polycarbonate?

Take a look at our handy guide here.

Can I change my order after it's been placed?

There will be a £6 processing fee for any amendments needed after placing your order.




Ideal for what I required doing my project of fitting a full length wardrobe.


Priced fairly, good quality, exactly what I had wanted. As a base for my Doll's House it blends in with the same material it is built with. It finishes the whole appearance. Very pleased.


It's exactly what I needed.




Wood was cut to size and arrived very quickly and packed really well.









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Our Customer Service Team is available Monday to Friday 9am - 5pm.

Rated 4.7/5 on Feefo

Good product, well packaged, prompt delivery
After placing my order, the following day I re-checked the measurements of my project and found that I had mistakenly sent my order with the wrong sizes. I then went back to my order to make the necessary adjustments thinking that it was too late and would have to pay extra for the changes. However I was very pleased that there were no additional fees and that the staff were very helpful and understanding. My order arrived on the said date of delivery and was well packaged. The measurements were accurate and cut to the correct size. I was really pleased with the end product and how it completed my project. I would certainly recommend this company to my family and friends and will use them again. Thanks Mr Reid
I would recommend Cutmyplastic, they provided exactly what I was looking for. I was building a backscene for my model railway. I wanted material that was flexible, manageable, indestructable and easy to cut. It was all of these and easy to paint, too. No need to cover with paper.
Quick, quality.

Based on 842 reviews.