Hi, When taking carpet up, found old marley vinyl tiles glued on with bitumen (house built in 70's). As these have small amounts asbestos and some were loose or cracked, I removed them all with p3 mask & Hvac etc. Then to seal the bitumen, I used Leyland trade heavy duty floor paint. Its gone on, but has changed colour from a grey to a pale green almost immediately. It stays grey where there are parts of the bitumen floor that I PVA'd a few weeks ago after some tiles came loose by themselves. Probably should have used Arditex NA SLC on the bitumen, or sealed it first - I was rushing. So Im guessing I need to put another coat on or two until it stops changing colour...The bitumen is also meant to have asbestos in it also but pretty stable - just needs screeding or painting over. So Im a bit concerned that the colour change means something isnt right and that the paint wont stick properly longer term or that the bitumen isnt properly sealed. I plan to put more carpet down on top. Any advice would be gratefully received on how I should proceed.