Ceramic Over Black Emulsion Residue - Flooring - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring


Thread Tools Display Modes
Old 08-27-2012, 04:57 PM   #1
Join Date: Jul 2012
Location: long beach ny
Posts: 85
Rewards Points: 119

ceramic over black emulsion residue

I stripped the old floor tile from my concrete slab.
They came off easy but the concrete is coated with the old a black emulsion adhesive.
What do I need to do, if anything, before I install new ceramic tiles?

Thanks in advance for your responses.



RH913RH is offline   Reply With Quote
Old 08-27-2012, 07:09 PM   #2
JazMan's Avatar
Join Date: Feb 2007
Location: Troy, Michigan
Posts: 5,649

Hi Ralph,

We get this question about a million times a week. Read the following info provided by the TCNA and pay attention to the last sentence concerning tiles that contain asbestos, (which if it's old, yours probably does).

Can I bond tile to the black "cutback" residue left when old vinyl tiles were removed?

Whether or not a person should ever set thinset and tile to the glue left behind when non-asbestos vinyl tile was removed depends on the type of glue left behind.

Physically removing all coatings is the most reliable way to make sure you have an appropriate surface to which to bond tile but the old asphaltic (black) adhesives (often called "cut-back") can be very difficult to remove unless you use shot-blasting equipment. Fortunately, most grout and mortar manufacturers make a thinset which will bond to "cut back" adhesive.

Typically, the "cut back" should be scraped smooth so the tile is not sitting on ridges of adhesive - although it does not have to be absolutely flat. Note, not all thinsets will bond to cutback so it is important to make sure the thinset used is made for that purpose.

Also, the adhesive must be true "cut back." That means it was made from asphaltic material, is not water sensitive, and will not soften when exposed to water. There are also black-colored latex-based vinyl adhesives that will not hold up under ceramic tile if they get wet.

If the adhesive is softened by water, then it should be removed by shot-blasting. Generally, chemical removal is not a good idea because the solvents used to remove the adhesive can drive "bond-breakers" deeper into the concrete.

It should also be remembered that the removal of asbestos-based resilient tile requires very different handling and the comments above do not apply to such installations.



TILE GUY - retired- TROY, MI - Method & Product suitability consulting.

MARBLE from ITALY & GREECE - PERLATO - PERLATINO - BOTTICINO - THASSOS - SIVEC - VOLAKAS - CALACATTA - NAXOS - Slabs - Tiles - Custom containers marmo.sicilia@yahoo.com
JazMan is offline   Reply With Quote
Old 08-27-2012, 07:26 PM   #3
Join Date: Jul 2012
Location: long beach ny
Posts: 85
Rewards Points: 119

Thanks for the quick reply.
RH913RH is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Could use some help on ceramic vs duraceramic tile helpmike Flooring 17 03-29-2011 11:42 PM
Laying Ceramic floor tomorrow - Will mortar stick over glue residue? pure_energy1 Tiling, ceramics, marble 16 02-26-2011 10:41 AM
Black mold growing on my clay tile roof Flt_Simulation Roofing/Siding 1 02-07-2011 03:05 PM
Installing floor tile but don't want grout gap to turn black overtime gatorade Flooring 4 02-07-2011 12:13 AM
Black residue bamamama Flooring 3 08-19-2009 02:35 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1