Rated 3.4 out of 5 by 36
Rated 5.0 out of 5.0 by Backbreaker911 Removes Black Mastic (old adhesive)
This was for 100 sqft room
I poured the product on, directly to the surface. Staying within a 2x2 area.
I waited 20 mins, used my scraper to take off the bulk of the adhesive, collecting it with paper towels (Bounty 8 rolls).
In the same 2x2 area, I used the 747 Sentinel in an old Windex bottle and gave a light coat. Then used an old dish brush to work the product into the concrete.
Using paper towels to wipe it off.
Afterwards, when this black tar mess was wiped up. I went over the concrete with driveway/concrete cleaner and a hand brush.
Advice: Use paper towels to collect the mess. Dont wear clothing that you care about. Kitchen gloves are your friends. Its not toxic, just messy.
June 29, 2016
Rated 1.0 out of 5.0 by paul did not work for vct/carpet glue
label says removes vct and carpet glue. Not one bit. Goof off worked much better.
July 13, 2016
Rated 5.0 out of 5.0 by Johnny Great Stuff!! Removing Vinyl adheisive
This stuff is great! I use this for removing automotive vinyl sticker adheisive. I've used several gallons now and have no complaints at all. After transfering it to a spray bottle it will spray in either a fine mist of stream, with its slight light oil consistancy it doesn't evaporate quickly but will evaporate leaving little to no residue, although it does have a smell, it's not overwhelming. After removing the vinyl just spray it on, let it sit for a few minutes and either use a plastic scraper or stiff plastic brush then a terry cloth rag and the paint is ready with no scratches. This has taken a whole day job for me and turned it into a two hour job.
May 4, 2016
Rated 4.0 out of 5.0 by HappyDIYerInDiego Works as advertised on early 1960s black mastic. Seems to be safer than any other method I have tried.
My 1964 home originally had 9x9" vinyl tiles glued to the concrete floor with black mastic a.k.a. "cutback" adhesive, with cheap carpet on top of that. I am getting rid of the original flooring and putting down hard tile.
I rented from my local Home Depot a "Diamarush" and a floor buffing machine to remove the mastic from one room. That worked well but created large amounts of dust that is nasty and may also contain asbestos.
I have also tried Jasco Paint & Epoxy remover which contains volatile organics. It's highly toxic and difficult to use because it turns the mastic into a tarry goo that is hard to lift off the floor and dries quickly back to a hard mass. I decided that (by itself) would not be an economical solution to my problem.
Sentinel Formula 747 works as advertised. FOLLOW THE INSTRUCTIONS and don't expect it to work on adhesives other than what the manufacturer specifies.
I haven't yet tried the recommended Sentinel Formula 810 for final clean-up, but the Jasco Paint & Epoxy Remover worked very well on my test patch. So did denatured alcohol.
Removing black mastic is a horrible, nasty job even with the best tools available. The Sentinel 747 product seems to be the most painless and least hazardous way to get the bulk of it off of concrete.
June 5, 2016
Rated 4.0 out of 5.0 by GED Pretty Good. Would use it again
I have a 1960 house. The black mastic underneath the 10x10 squares needed removed.
After a couple attempts with the product I found this to be the easiest way to use it.
Tape plastic anywhere you want to protect.
Have an area to change your shoes and such to keep from tracking anywhere outside the project area.
Tools - 747, Big Squeegee (I used one meant for driveway sealant), metal dust pan, kitty litter. Broom- or brush, Mop, Dawn Dishwashing detergent, bucket., Wet/Dry Vac.
apply material liberally. Brush it evenly on the floor. I brushed back and forth and in a circular pattern. Let it sit for several hours (I waited four or more). I scrubbed one more time with the broom. Then used the squeegee to form puddles and apply kitty litter. Put that in a waste bucket. Bush any other areas that are stubborn or use a scraper. Continue to collect the material in puddles and remove with the kitty litter. Very quickly after this, apply the bucket of water and dawn solution with the mop and swirl it libberly. Vacuum the water with the shop vac. I used a dehumidifier to aid the drying process. The last step is to rinse again with plain water.
May 24, 2016
Rated 5.0 out of 5.0 by MarreroGirl !OMG! Buy this stuff IT WORKS!!
I'm in Marrero, La.(mom)..I peeled up my ORIGINAL 1970's tile and found a BLACK GLUE...I was like wha'da' HECK. So I looked around, tried GOOF OFF..!BAD MOVE! Read that this (Yellow Bottle) stuff will LIQUIFY THE BLACK CUTBACK GLUE..I was like...okay, I'll try it...!OMG! It did just what it said. I poured it on the floor, spread it with a broom, waited 30minutes...took my LARGE WINDOW SQUREEGY (that's all I had at the time) and YES!! I was so excited it was working I teared up. I'm gonna try to post pictures.KEEP IN MIND, ITS A GLUE REMOVER, so once you remove the BLACK GLUE and you discover TILE BACKING..that's a whole nother issue..but THIS STUFF will take up the BLACK GLUE.
March 1, 2016
Rated 5.0 out of 5.0 by Matt Miracle liquid
This stuff worked great on my cutback adhesive on the concrete floor in my basement. I rolled it on using a foam roller even though the directions said to mop it on. It starts working immediately. There are no fumes or anything either so my wife didn't complain about the odor like she usually does when I work with chemicals. It actually has a slight citrus smell to it. I made the mistake of doing about a 12' X 12' area at once. That was a bad idea because it works so fast I couldn't keep up with it. I ruined my shoes and pants because I got the dissolved cutback adhesive all over them. I'd only do about 4' X 4' if I ever had to do this again.
January 26, 2016
Rated 1.0 out of 5.0 by Arn Worse than useless
I was attempting to remove tan/yellow carpet glue from VCT that had been overlayed with a commercial glued installation. A trial area was unsuccessful with only about a 20% removal but I attempted to power on. Applying it to the entire floor in a 7x9 room, I let it sit for 30 mins hoping to soften the adhesive and remove the high spots in the mastic ridges then come back and clean up what I could of the rest. Very poor results. Worse yet, when trying to use a razor scraper, the softened mastic had become like an ice rink. I abandoned the room until the mess abated. Curiosly, I had better results with plain hot water. This product may work with other glues, but not this typical carpet adhesive.
March 5, 2016