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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?

thanks.

-steve
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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.

Pete
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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.

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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.
-steve
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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.
Regards,

Ronald van Aalst

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