New (very old building) shop

[Lynn]

No. My buddy the floor expert recommended NP-1.

I followed this guys procedure with a couple of changes. https://www.youtube.com/watch?v=lBc2SXiEtd8&t=1058s

1. I did not use any fine sand to cover it. I don't care to have it sanded. I will be using a floor scrubber to keep the floor clean, so skipped the sand.

2. I had a hard time getting the exact amount of caulk in the joints, so slightly overfilled; then dry tooled with a plastic putty knife (NOT a curved caulking tool), wiping off the excess as I went along.

After dry tooling I DID go back over it using the 409 as a lubricant, and it REALLY smooths it nicely.