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sealing MDF for a pattern

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sealing MDF for a pattern

Postby steve k. » Sat Mar 22, 2008 12:43 pm

does anyone have a good approach for sealing in MDF? before i carve a pattern in a brick of MDF i want to be sure my approach is correct for sealing and getting a perfect surface on the MDF. any suggestions?


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Postby Pirate » Mon Mar 24, 2008 12:28 am

I use automotive primer. It may take a few coats, but it finishes up well.

I also know that mdf takes latex paint extremely well. If you can get a smooth coat on, or get it sanded down smooth, this would be a cleaner and less smelly method.

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Postby Sub culture » Mon Mar 24, 2008 6:32 am

A couple of thin coats of PVA (wood glue) work well. Although primer works well too.

'Why are you staring at an empty pond?'

Want to dive your boat in crystal clear water? Then you had better Dive-in-
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Postby steve k. » Mon Mar 24, 2008 6:36 am

thanks for the replies! hopefully i'll be milling out my pattern this week.
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Postby raalst » Mon Mar 24, 2008 9:08 am

I used PVA on MDF as Andy suggested, but my version of Polyester
catalyst did react with the moisture in the PVA. This was confirmed by the
shop selling the stuff : *no moisture*.

So, be sure to test OR be sure to dry the PVA thoroughly before
using PVA and Polyester.

I used Cobalt based catalyst.

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