However, if you don’t want to paint your MDF there are a few alternatives to primer/sealer. Effectively, they do the same job - seal the MDF - but in different ways. If you like the natural look of MDF and want to add some protection you can use a clear varnish - choose matt or gloss - to keep your MDF looking like new. An oil-based varnish is the best choice for this. You apply in much the same way as primer/sealer/paint, with a brush or roller. It is worth noting that you can still paint over the sealer if you change your mind, but if you are going to paint, you’ll be better off using a coloured sealer/primer. It has a thin consistency which means that you typically only need one coat to seal your MDF, which will be touch dry within 30 minutes. If it needs another coat you’ll have to wait for a couple of hours before you can apply. The big issue with MDF is the edges, these are more porous than the top/bottom of the board and need more attention. To get a really smooth non-porous finish on the edges you can use wood filler or MDF edging tape. If the edges aren’t going to be seen simply add an extra coat of sealer/primer and rub down. What Alternatives are There to Specialist MDF Primers and Sealers?

We also deliver to the majority of non mainland UK locations including The scottish Highlands & islands, Isle of Man, Isle of Wight, Isles of Scilly and Northern Ireland. Please see full delivery terms for the extra charges associated with these locations If you want a good smooth paint finish on your MDF, there isn’t any real alternative to priming or sealing. Medium-density fibreboard is made from small wood fibres such as sawdust and shavings, which are mixed with resin and wax and compressed into panels. It is not fond of water as this can make the board swell. So it needs to be treated - or primed or sealed - before you consider painting it.

Find a stockist