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Ta. It was a massive pain to do. Lifted the whole floor (utter ballache with tongue & groove), cleared out all the crap from beneath, took out the hearths, added new joists, repointed the walls, rebuilt dwarf walls, suspended wool institution between joists, laid airtight membrane fixed behind the skirting, relaid the floor with some additional boards from a reclamation yard to replace broken ones/fill the gaps from the hearths, countersunk all the screws, filled over the heads, sanded, oiled, rubbed down.
I wouldn't bother.
That's what I used. The amber one with a coat of clear on top. We painted ourselves out of the front door as we left to visit my parents for Xmas. That was maybe 4 years ago