How to waterproof MDF

MDF is a fantastic material that is relatively less expensive than many other alternatives, such as plywood. Its smooth and consistent surface makes it a great surface for painting and cutting detailed designs.

Highly versatile, MDF can be used for a number of different purposes including kitchen and bathroom furniture and window sills. It has a very consistent structure, which means any cut edges appear smooth and reduces the risk of splintering. However, when used in high humidity areas such as these it’s essential to ensure your MDF is waterproof and able to withstand moisture.

Waterproof MDF is available, though it generally comes at a much higher price than standard MDF. Waterproofing MDF yourself is a cheaper alternative and it’s relatively simple to achieve.

Making MDF water-resistant

What you need is a high-quality wood varnish, sealant, or stain – Barrettine treatment is a great option as it is a wood sealer for rough, sawn, or smooth timber. It also comes in a range of colours, so you can make the MDF look more attractive while adding a layer of waterproof protection.

Or, if you’re looking for more all-around, all-year protection for exterior MDF, it’s worth checking out the range of Sikkens products which also guarantee protection from all elements, including sunlight.

Once you’ve got your ideal sealant, apply a few coats and you’re good to go. This is a great option for kitchens, bathrooms or exterior doors and will save you a lot of time, and money and repair in the long run.