Laying vinyl tiles on concrete floor

[Maggie1]

Hi
I have taken up some really old tiles in the hallway which have prob been there since the 60's.
I want to lay some stone effect self adhesive tiles (B&Q Colours)

http://www.diy.com/departments/colo...-adhesive-vinyl-tile-102-m-pack/863644_BQ.prd

There is black yukky glue still stuck to the concrete floor.

My questions are

Should I get as much of this glue up as I can or should I leave it there? (I did start this using a heat gun but it's slow and messy almost like tar.)

The floor is quite level and I have been told I should seal it with a PVA and water mix then lay the tiles on top.
Is this a good idea?

There will be a waterproof runner on top of the tiles as I have a dog and don't want to be mopping up wet footprints all the time.

Any help would be greatly appreciated.
Many thanks

 

[jctilingservices]

realistically if it were me, I would try to get as much of the old adhesive up as possible, then seal the floor maybe with SBR or an equivalent, I would not use PVA ( tilers wont use PVA, maybe floor layers who fit vinyl would, so for me it would be a no no with PVA and water ) how big is the area ? its also possible that you could lay a self levelling screed over the top, then fit your vinyl tiles.

Remember that PVA is water based, so if you are wanting to use it , I would use it neat, that's if I had no other option but to use PVA,

 

[cjard]

Floor layers wouldn't be using BnQ self adhesive vinyl stickers; they'd be using Karndean. They'd then also be using a dedicated glue which would either be fine to go straight onto concrete or it would have its own primer/sealer