Adding Mildewcide to 2-part pour foam

[Lojanica]

Hi All,

I was considering the use of 2 part pour foam for filling big irregular shaped areas around my refrigerator freezer. Has anyone ever added a mildewcide to 2 part pour foam? Seems like it would be a good idea. Just wondering what if any effect it has on the polyurethane closed cell foam. I was going to use 2 lb foam.

Thanks. Any input appreciated even if you think it's an idea fraught with folly.

[UNCIVILIZED]

Make sure that the foam definitively won't absorb any moisture, as some foams do despite being closed cell types. Which can really cause problems. And be sure to seal it well.

[a64pilot]

That stuff when expanding can apply some serious pressure too. I have seen it completely jam widows in a house

[leftbrainstuff]

Unless you get a good void free pour even closed cell foam will trap dirt, particles and moisture.

I prefer to build my insulation with foam panels bonded together. Foam pours are better suited for houses and pouring racecar seat molds.

I also tape with reflective tape to provide an air tight seal. This is the key to maximizing insulation effectiveness.

Expanding foams will also distort and buckle surrounding panels as they expand and set. It's tricky to fill a void and avoid over expansion in closed areas.

I can't see the benefit of using a fungicide. Mold tends to geow or nucleate on foreign matter like dirt, dust and grit. So I can't see a fungicide being effective on any porous media.

[Lepke]

I use MX-3 in all my paint and varnishes, but suspect in 2 part it is contained within the product, not on the surfaces exposed to mold.
I've used expanding foam in voids for many years. You need relieving holes that later get glassed. Some foams have to be encased in fiberglass because of health issues. I use styrofoam panels around my freezer and fridge.

[Lojanica]

Thanks for the replies!!!

[Badsanta]

Originally Posted by leftbrainstuff

Unless you get a good void free pour even closed cell foam will trap dirt, particles and moisture.

I prefer to build my insulation with foam panels bonded together. Foam pours are better suited for houses and pouring racecar seat molds.

I also tape with reflective tape to provide an air tight seal. This is the key to maximizing insulation effectiveness.

Expanding foams will also distort and buckle surrounding panels as they expand and set. It's tricky to fill a void and avoid over expansion in closed areas.

I can't see the benefit of using a fungicide. Mold tends to geow or nucleate on foreign matter like dirt, dust and grit. So I can't see a fungicide being effective on any porous media.

How do you bond your foam boards?
Thanks