DiversiGum Sealing Compound - 1 lb. Slug

This was one of the only sealing compounds I could find that was closer to a white color. It's definitely an off-white/cream/light gray color, but in my opinion looks much better than some of the other dark gray and black compounds (which are more commonly available). The only true white compounds available seem to harden and don't remain semi-malleable as I'd want. Installed this primarily on the exterior to seal holes/gaps around HVAC vents, linesets, and other protrusions. Seems to have worked well thus far, and I would continue to buy this again.

We use this sealing compound to prevent air leaks after doing sealed system work inside refrigerators and freezers.

products used to filled exterior bore holes

When I had a new HVAC system installed several years ago this is what the installers used. When I had to replace some of the older sealant I found this product and since it had worked so well on the new install I thought I would try it. The product is an off white/gray color and holds up to the elements. Over time doesn't become as dry and brittle as as traditional plumbers putty.