sealing MDF for a pattern

[steve k.]

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

[pirate]

I use automotive primer. It

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

[Guest]

A couple of thin coats

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

Andy

[steve k.]

thanks for the replies! hopefully

thanks for the replies! hopefully i'll be milling out my pattern this week.
-steve

[raalst]

I used PVA on MDF

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.