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18mm MDF Board Moisture Resistant 2440mm x 1220mm (8' x 4')

URN: 4004003

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£29.08ex. VAT £9.76 per m2
£29.08ex. VAT
£9.76 per m2
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Based on your total area of m2 (inc. 10% wastage) - of these are required (actual coverage of m2)

We recommend purchasing at least 10% extra product to allow for errors, damages or obstacles

18mm MR MDF Board 2440mm x 1220mm is perfectly suited to interior applications where high humidity and high moisture are a risk, such as bathrooms or kitchen furniture.

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Product Overview

18mm MR MDF Board 2440mm x 1220mm is perfectly suited to interior applications where high humidity and high moisture are a risk, such as bathrooms or kitchen furniture.

URN: 4004003
£29.08ex. VAT

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This charge is based on delivery to mainland UK excluding the Scottish Highlands. If your delivery address is in the Scottish Highlands a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.

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Key Features

  • Ideal in applications in which humidity can fluctuate
  • High internal bond strength
  • Easily shaped with machine tools and hand tools
  • Easy to handle
  • Interior use only
  • Suitable for a wide range of machining and surface finishes

Technical Specification

Technical Specification
Bond Class:BS EN622-5
Thickness:18mm
Width:1220mm
Length:2440mm
Sales Unit:Sheet
Sales Unit Coverage:2.98m2
Application:Shelving, cabinets, manufacturing
Edge:Square
Indoor/Outdoor Usage:Indoor
Finish:Sanded
Country of Origin:Wales
Grade:Medium density fibreboard
Wood Species:Pine / Spruce
Formaldehyde Level:E1 (low)

Colour and finish are representative only and may vary slightly as this is a natural product.

What Is 18mm MR MDF? 

Where standard MDF buckles and bloats, 18mm MR MDF triumphs. This premium-grade MDF is specifically engineered with a moisture-repellent resin to withstand high moisture levels and humidity in interior applications such as kitchens or bathroom furniture. 

18mm MR MDF sheets can be easily identified by their hard-to-miss green face and can also be cut to shape with both hand and machine tools to bring out the best of their wonderfully smooth surface finish.

This clean and smooth finish also ensures a pristine paint finish when wall panelling or tackling decorative projects.

We also sell a range of other performance sheet materials


18mm MR MDF Applications

18mm MR MDF is a highly versatile panel, purposed for use in damp conditions such as bathrooms, boiler rooms, utility rooms and kitchens.

While it is moisture-resistant, this does not mean it is waterproof or water-resistant; just like standard MDF, it will degenerate if put in direct contact with wet conditions. For this reason, we recommend using 18mm MR MDF solely in internal applications.


18mm Moisture Resistant MDF sheet material is perfectly suited for the following applications:

  • Furniture
  • Bathroom and kitchen furniture
  • Flooring
  • Doors and window boards
  • Shelving
  • Skirting boards
  • Cabinets
  • Wall panelling
  • Laundry rooms


18mm MR MDF Benefits

One of the many benefits of 18mm MR MDF is that it has a slower swelling rate than that of standard MDF, making it a more reliable material candidate for humid conditions.


Let's check the specs:

  • Ideal in applications in which humidity can fluctuate
  • High internal bond strength
  • Popular in the joinery industry
  • Easily shaped with machine tools and hand tools
  • Easy to handle
  • Interior use only
  • Suitable for a wide range of machining and surface finishes
  • The panel conforms to the latest European low emission standards ‘E1'
  • Easy to sand down for a smooth finish (which also prevents harmful fibres from being released)


Do You Need To Prime 18mm MR MDF ?

When it comes to painting MDF, be it moisture resistant or standard, it will need to be primed before application. The primer acts as a sealant, in this case, ensuring that the topcoat of paint does not bleed into the MDF.


Is All 18mm MR MDF Green? 

Here in the UK, smaller MR MDF boards are typically green in colour, however, this is purely for identification purposes and has no ties to the actual moisture resistance of the boards.

There are MR MDF boards sold that are untinted and brown in colour, appearing very similar to standard MDF. 

Should you be wondering how to identify the MR properties in boards such as these, simply refer to the manufacturer's technical specification sheet and keep an eye out for standards related to MDF: EN622-5: 2009 (which covers moisture resistance).


How is MR MDF Made? 

The manufacturing process for MDF (short for Medium Density Fibreboard) sees wood fibres (wood chippings, recycled offcuts and sawdust) combined with resins and waxes cooked to a high temperature and pressed under high pressure to form sturdy uniform panels. 

MR MDF owes its moisture resistance to the moisture-repellent resin used to bond the wood fibres together; not all MDF will use this same resin. 

The manufacturing process eliminates knots, air pockets, and grain issues from the MDF boards, ensuring a uniform, defect-free precision finish. 

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