I'm going to be installing floating hardwood. Since I have the subfloors exposed (I screwed and caulked then because why not?) I thought I might also roll on mold-resistant primer like zinser.
I don't have a mold issue but I figured why not? It doesn't take that long and if it abates mold if I ever have water intrusion then it's easy to do right now.
In it's final form the layers would be: finished wood, pad, barrier, paint, subfloor, spray foam (from below).
Best Answer
I will normally seal underlayment in bathrooms and kitchens. This helps to for protect from moisture problems that are normal for these locations. I have not had any negative problems with sealing and in some cases I think it has helped with vinyl.