Blue Bear® 500MR Bean•e•doo Mastic Remover –Professional Soy-Based Adhesive Remover for Carpet, Tile & Asbestos Mastics – Low-Odor, Non-Toxic, Safe for Schools & Hospitals – 5 Gallon

This product worked great on complete removal of 80 year old mastic. Now, it doesn't just eat mastic instantly, it takes a bit of working. You need a floor scrubber with hard bristles. It takes about a half hour for the compound to start affecting the mastic. Should be scrubbable at that point. After a good scrub you should get a clean squeegee wipe and the compound will be dark like used motor oil. The compound will keep the mastic from sticking to the bristles as well. Squeegee into some absorbent so you can sweep it into a bag. Don't just dump a bunch on and let it sit. It will evaporate and the mastic will become gummy. Just hit a corner, scrub, squeegee, and then reapply if you need more. You can make the product stretch more that way. The odor is no big deal. Citrusy, but definitely has an underlying "Cooking oil" smell. It actually works better than paint thinner and yes, I tried that on a small spot. Value? Well, the stuff isn't cheap, but I have tried the cheap stuff and it doesn't work. This stuff will work no matter how old the mastic is so you can't get much better value than that. It is oil so you will need a good supply of Dawn soap or a suitable degreaser to mop the floor clean with. You can probably push some absorbent around to wick up what you can as well. You have to get all that oil out if you plan on redoing the surface.

I have a 1000 square foot basement that had old vinyl tile on it. After the tile was removed, I had of course discovered the black mastic that will lead most people to this product. I watched several videos, read the reviews, and did my research on different methods of application and removal. Ultimately, I ended up needing two five gallon pails to fully liquify the mastic. The first pail liquified certain spots where I had put it on thick, but others were just tacky. With ten gallons of Bean-e-doo I was able to successfully liquify the mastic. The mastic turns into a black oil substance and was wasy to soak up and remove. My procedure for application and use was as follows. Using a small broom, I applied a liberal coat of bean-e-doo across the floor. I let the bean-e-doo sit for three hours and then went down stairs with a steel bristle deck brush on a handle. I squeeged the liquid around the floor until I located a spot that was still hard. I would then squeegee the liquid oil like substance into this spot and scrub it with my metal brush until it was bare concrete. After I had scrubbed all of the hard spots and successfully removed most of the mastic, I squeeged the mastic oil into a centralized location and covered it with four bags of kitty litter. I shoveled the saturated kitty litter into the empty beanie-e-doo pails and an additional bucket I had laying around. I sealed all three of these and took them to a disposal center. I used a mixture of one gallon dish soap and two gallons of simple green to degrease the floor temporarily while I prep part of the floor for demo and a bathroom installation. I again used the steel brush and scrubbed the floor as I went. This was followed by pressure washing the floor and then I squeeged it dry. Upon completion I intend to use the emerge degreaser that I purchased to remove any residual product left behind. On a side note, it did leave the basement smelling pretty bad, but with the new egress window I am cutting out it should ventilate well.

I used this on the dreaded black mastic that is sticky and tar like and most likely has asbestos in it. It softened it up within a few hours and a second coat took off the last residue where it may have been thicker. This mastic had been down since the 50's I believe and now the floor is clean and ready for tile. I did use a degreaser after finished so the new tile would adhere well. I like the fact that it is hard to have airborne asbestos when it is all in a gooey liquid form so it seems quite safe. It smells a bit like citrus, pleasant and mild.

I’m iffy on my overall rating. To be clear, this worked wonderfully on cutback adhesive. I removed the VAT with a wallpaper steamer and a 6” drywall knife. In some areas, the tiles came off with essentially no effort. This was a mixed blessing: the more steam needed to remove the tiles, the less effort involved in removing the cutback (because most comes off with the tile). Alas, the converse is true: if the tile is easy to remove, the cutback is attached to the concrete, not the tile. (Also, a recommendation: put the tiles in very small cardboard boxes and then wrap the boxes in plastic— that will keep them from poking through the asbestos bags. When I say very small, I do mean very small, because those things are heavy in any quantity.). I used a 3/4” nap roller on a long handle to apply the mastic remover. The first application, I let it sit while I did something else. The second application, I walked around with a deck scrubber and scrubbed at every area where I’d applied the remover. The first time, I tried using a squeegee, but the concrete was uneven enough that the wide squeegee didn’t work well. (Also, one of the areas was a small bathroom in which maneuvering the squeegee was impossible— something I hadn’t considered.) The second time, I used a 7” floor scraper to move the liquid instead. That was more effective. In both cases, I ended up liberally covering everything with oildri quicksorb and then sweeping/vacuuming it up. The oildri worked wonderfully. I went after the floor afterward with the matching degreaser— which I’d give a low score. After two applications, there was still noticeable oily residue and smell. My third try was with Dawn dish soap, which seems to have been more successful. (Maybe the Blue Bear degreaser works better with a commercial floor scrubber?) The remover says it also works on carpet adhesive: let it sit 4 hours and use a scraper. My experience is that it doesn’t work on the carpet adhesive at all. Followed directions exactly; 0 carpet adhesive removed. (I can probably get it off with a steamer and scraper, but I was hoping for a miraculous success like the cutback.) I guess ultimately it depends on what you’re buying it for, and how much work you’re willing to put in. But! Learn from my experience: use a deck scrubber to agitate and a smallish floor scraper (instead of a large squeegee) unless your concrete is like glass.

I needed to remove about 700 square feet of black mastic from 1967. First, tried two other products that weren't able to soften my mastic. I switched to the Blue Bear and it did the trick. I did my job by applying the wettest coat of Blue Bear that I could. I used 10 gallons for my 700 square feet of floor. I allowed it to sit overnight. In the morning, the floor was still wet in areas, but in other areas the mastic had absorbed the Blue Bear liquid. Next, I went over the whole floor with a rubber squeegee and collected all of the now liquified mastic in a bucket. After the squeegee work, a lot of thick mastic still remained, but it had been softened. I then rented a 17 inch floor buffer and bought 20 of the 3M black floor stripper pads. I also bought 7 gallons of Zep citrus degreaser concentrate to wet the floor and help with the cleanup. From there it was almost easy! I poured the degreaser concentrate right on the floor and used the machine to wet scrub the mastic. This method would remove about 4 square feet of mastic every 15 seconds. All of the liquid and mastic wound up soaked into the stripper pads. Once a pad filled up with sludge it would need to be changed. I easily used all 20 of my pads and wished that I had bought 5 more. I finished the main job in about an hour and then cleaned up the corners by hand with a steel wire brush. Finally, after two rounds of mopping with detergent, my floor was clean and ready to tile.

The product lifted up 98% of the black mastic on my basement floor. I was left in awe since it was my first time using it. There were some stubborn spots but a light second application removed it. Do inform yourself of using this product before since the product itself is harmless but the mastica it removals can be dangerous.

Please don't waste you're money on this product because I can promise you if doesn't work you will have one of the biggest messes you've ever dealt with. I am not saying it's worthlessness but it didn't work on my concrete floor and anyone who has ever cleaned up oil will tell you It's hard and expensive and sometimes impossible. This stuff basically made the glue soft but not soft enough to remove , so what you're left with is oil and glue and it's not possible to mop it up and the amount of money and time you would spend on mop heads. I had to rent a 300.00 a day machine that requires 2 men which cost me another 100.00 for his day and grind the floor to remove the mastic and oil because aside from carpet and click flooring you can't put any adhesives on a oily floors and its stuck in the glue so the mop head is Litterally useless after 2 swipes and they are 7.00 a piece. Sorry I'm rambling so the long story short is if it doesn't work you are screwed and my project was in a residential home with concrete slab living room and bedrooms , so just imagine how the customer reacted to what happen when I put this stuff on there floors and they couldn't even stay in their home. I definitely definitely definitely regret not doing a small small test area. Biggest costly mistake I've made in my business. Good luck people and remember if something sounds too good to be true it probably is.serk iut an abatement company or floors machine with "strip-certs" as the head attachment. Don't do it yourself make sure you have a helper to operate shop vac and control water.

I had that black mastic tile adhesive on my basement floor. I had tried various methods and products to remove it. Nothing worked very well until I found this product. Follow the instructions and it will do the job. Be prepared because using this product for removing the black mastic is very messy, but that is to be expected. I was concerned that there may be a lot of odor, but seriously, the odor is very low, and its not a bad odor at all. The odor is almost pleasant. To remove the black mastic, I purchased/used: Bean-e-doo Mastic Remover - to remove the mastic Duct tape 4" wide - to contain and tape of any possibly splatter Rubber gloves - obviously to keep my hands clean Scrub brush broom - to work the mastic remover into the mastic Squeegee - 24" wide to work the mastic remover around and help for clean up Shoe covers - to help keep my work boots from being completely ruined Cat litter - lots of cheap cat litter really helps to soak up the mastic remover when you are done Shovel - to pick up the cat litter Trash bags - to put the cat litter in Mean Green and mop - to clean the oily residue left behind from the mastic remover