After pulling up some vinyl flooring there still is a thin layer of adhesive bound tightly to a concrete slab.

Can I go over this with RedGard to seal and then regular thin set before I lay ceramic tile on the floor? This is a small area (25 sq/ft) and everything else is new concrete board.

Otherwise it would have to be ground off. Scraping with a Big Mutt won't even take it off...

thanks,

-spence

YES YOU CAN

I wouldn't.

If you're installing real tile(ceramic,marble etc.):
Remove ALL adhesive.A good quality heat gun will soften vinyl tile adhesive.Some chemicals like lacquer thinner will soften some glues.(ventilation either way!)

Etch it with muriatic acid and you're ready to go.Check for level and use floor leveler as needed.

Spence send Hooligan a PM! He is a tile installer and my next door neighbor...he will be glad to answer your questions!:uhuh:

Ask him if he want's to come down to Tiverton and do a quick shower for plugs :hihi:

The mastic is coming off, but what a pain. I did get some stuff to soften it but need a better scraper.

-spence

After pulling up some vinyl flooring there still is a thin layer of adhesive bound tightly to a concrete slab.

Can I go over this with RedGard to seal and then regular thin set before I lay ceramic tile on the floor? This is a small area (25 sq/ft) and everything else is new concrete board.

Otherwise it would have to be ground off. Scraping with a Big Mutt won't even take it off...

thanks,

-spence

You do not have to take all the cement and lino off
And “Do not” use any strippers or solvents they will always leave a residue
Especially on concrete where they can soak in and stay
I do not know what “RedGard” is ?
However I would scrap up any lino and felt you can
Then if setting 12x12 or larger tiles use a 1/4x1/2 “round” notch trowel
Round notch gives you a better bed apposed to a square notch “fuller comb out”
Use a thinset that is rated to go over Lino ie.. Latircrete 245 Platinum
You can get Latircrete products at Lowes or call around to tile stores
If you are bonding to cement it has no deflection so Bond will not really be tested
However a good supporting bed should be applied…ie 1/4x1/2 round notch trowel
If you PM me Ill give you my cell if you have any questions :uhuh: