Thread: Calling all of the Foam Experts (question)

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I have been on this site long enough to know that there are quite a few foam experts on this forum. My question to all of you is what do i use to fill in any gaps or seams on pink poly foam? I have quite a few areas on my tombstones that i would like to patch and smooth out before i paint them. So what do you all suggest?

I have never tried to fill in the joints...but if I were going to attempt it I would use joint compound. The problem you may have is those joints have some flex in them and may crack.

Silicone caulking is my fave for filling in holes and gaps in foamcore. Same stuff you'd get for caulking around your bathtub or windows. It's available in the little tubes and for a caulking gun too.

Waterproof, paintable and flexible. I also think it's water cleanup (every type I've gotten has been anyway)

Joint compound is great, but it isn't waterproof and will crack.

Make sure you read the tubes....some of it is not paintable.

I'd go with joint compound or Bondo. That way you can sand down the surface to get exactly what you want

I use joint compound too. Never had any problems with it.

I have used joint compound and some times wood filler in a pinch. Stick with the joint compound because it works best. That wood puddy only cracked and shunk up. The joint compound is nthe way to go.

I don't worry about getting a perfectly smooth surface since I want them to look old and weathered but I use Lepage PolyMC Spackling Compound.

I use this as a seam sealer and to fill in any gaps. I prefer this instead of regular drywall mud as it is for interior/exterior, sandable and is water resistant. So far I haven't had any trouble with it.

My favorite is Elmers Wood Filler. Cheap, sandable to perfectly smooth, or textured if applied with a popsicle stick in a spackle type motion, paintable, and doesnt crack on me like joint compound did. Oh, and dries in like 15 minutes (for a light coat) and is CHEAP!

Thank you, thank you and thank you!!!

I knew you guys could help me on this.