7 replies to this topic

[Pbmaster11]

I have done 50/50 glue and water, then sanded smooth... messy.


I have heard of drywall compound?

Anything else?

[John Fitz]

I've never done it (edge sealed MDF), but I've seen a lot of tips and tricks posted online

• Bondo
  
• Thinned glue
  
• Drywall compound (use the 'hot mud' stuff - dries harder and faster)
  
• latex caulk
  
• various versions of plumbers putty
  
• BIN primer (from Zinsser)

it seems like any sort of filler or sealer, which is compatible with your choice of paint, would work. I would definitely try it on a test piece first, since I'd be worried about the effect that any water-based product would have of MDF.

[CessnaPilotBarry]

I like Bondo. It's fast, durable when dry, and terrific to sand.

[dmcgarry]

i done 2 small mdf projects and sealed them with this:

http://www.rustoleum.../surface-primer

2 coats of the primer around routed and cut edges was all it took,

here's a link to what the finish looked like after the primer/sealer was put on and the finishing coats:

http://www.wexfordwo...llsaw-name.html

http://www.wexfordwo...-baby-room.html

[CessnaPilotBarry]

dmcgarry, on 06 February 2012 - 12:34 PM, said:

i done 2 small mdf projects and sealed them with this:

http://www.rustoleum.../surface-primer

2 coats of the primer around routed and cut edges was all it took,

That looks like it's worth a try! I haven't seen it before.

[dwacker]

Any oil based primer is fine.

Don

[Ace]

Enduro white undercoat. It's a block-out primer. Sands very easy to a fine powder.

[dcustoms]

We just shoot the edges with oil-based primer like dwaker said... sand and repeat...normally 2 coats depending how it looks.