We are sealing our basement floor (after acid staining) and the sealer left a bubbly finish. How 2 smoothe?

Question

We have an industrial size low speed floor scrubber,polisher and are using a white "Polishing" pad- but the bumps are not going away. We tried "wet sanding" with a piece of 1200 grit, seems to help. HELP!

Answer 1

I'll kick in a couple of more cents with DIY Doc. Get a sheet of 60 grit and try that but don't let it run long in one spot, keep it moving. If this works O.K. advance or retract from there if needed. I don't think the sealer has anything to do with it myself. I've used it for many years in a lot of places and have never had this happen. It sounds like a reaction to something but, what ? I don't know.

      Sealer will sometimes bubble and you can't shake it, like poly.

Answer 2

In whatever suggestions you get, it sounds obvious to me that the "SEALER" was either "agitated" to excess, before the application, or the method of application caused the issue. There may have also been some issues in residue left behind, or moisture.

  1200 grit must feel like clean glass. I can't imagine that being effective at all? I do suspect sanding is the way to go, but with a bit heavier grit, such as is used in auto body shops.

Just my two "sense"