Priming MDF before painting

Old 07-25-19, 12:32 AM
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Priming MDF before painting

I am after some advice on a primer for MDF. I have 70 pieces of wood that measure 25x6cm which equals a lot of cut edges so I’m looking for the most efficient method. I need my final pieces to have a white base to them so was hoping to just be able to paint the whole thing with white primer.

I have been googling and am getting mixed advice. A lot of places say to NOT use a water based primer. However there are a couple of issues. Firstly I am finding it difficult to get a non-water based primer in the shops round here. Secondly, when I google ‘MDF Primer’ a lot of the products that come up (and say MDF on them) are water based.

Can I use a water based primer? If not what should I use?
Old 07-25-19, 03:32 AM
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The thing is that you want a sandable primer. Latex based products often just gum up when you sand them. You want a primer that turns to powder. I would recommend SW wall & wood. Hope you have already planed or sanded your cut edges.
Old 07-25-19, 04:36 AM
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I've almost always used a latex primer on MDF and if it comes preprimed I'll often skip the primer. If your primer and job site are clean there should be minimal sanding needed. What is the end product?

btw - welcome to the forums!
Old 07-25-19, 04:43 AM
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I have never seen any MDF that was not pre-primed and the very few exposed cut edges painted fine without any primer!

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