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SandFree™ began simply enough......a wonderful customer bought 32 rugs! The customer was Mr. Johnson, of Johnson & Johnson, who developed the Grounds For Sculpture in Hamilton, New Jersey, and had recently added a 5 star restaurant - RATS! In your city, if you see a lifelike human, or child, in a pose of everyday life - ie. carrying an umbrella, holding a child on a knee, beginning to yell to someone, it might have been created at The Grounds for Sculpture. We became involved after the construction was completed and the floors had been finished by others. There were problems with the floor finish and Mr. Johnson wanted the floors refinished without closing the restaurant. He didn't want to deal with any dust. The fact that he said - "No Dust" - eliminated all of the so-called dust control systems or low dust systems. No dust is no dust. And if you're going to refinish a floor with no dust, it will only be done with out sanding. There isn't much I wouldn't do for someone who buys 32 rugs, so the quest for a "sandless" floor refinishing system began.
The real problem was this - how can you get urethane to stick to urethane without screening the existing urethane to create a roughed up surface to which a new urethane could adhere. Any loose urethane, or dirt would create a project that would fail. Therefore, the first part of the problem was to get rid of the loose, old urethane. The second part was to get rid of the dirt. The third problem was to come up with a way to get the new urethane to stick to old urethane without any kind of sanding. The final problem was to find a urethane that would dry quickly, with no odor, no flammability issues, and be durable. Frankly, the previous three sentences represented months of work., but as I heard said before,
"Finding the answers is easy. Figuring our what the questions are is what takes all of the time."
To resolve the first problem - removing the loose urethane - we found a butyl-based stripper, that wasn't that strong, but did remove any loose finish. Remember, our goal in Phase I wasn't to remove all of the finish, the goal was to make sure the old finish wouldn't further deteriorate after the new finish was applied. Once we applied a new finish, if the old finish was securely bonded to the wood, the finish would be all that much more protective. If there was urethane that was securely bonded to the wood, we could remove any cloudiness that might have been visible from improper cleaning techniques and it could serve as a good base to which a new coat of urethane could be applied.
After a little trial and error, and a few costly failures, because each failure meant we had to sand the floor, at our cost :-( , we found that Phase I really involved 2 parts. We needed to put the stripper on the floor, and then we had to get that stripper completely removed from the floor or the new urethane wouldn't adhere in some spots. We switched products a couple of times and found a stripper that would be water-soluble. That meant that we could rinse the floor and remove any trace of the Phase I agent. That took care of the first problem.
The next problem was the dirt. The stripper removed the urethane, but it didn't do much with the dirt. The rinsing helped with the dirt, but it wasn't enough. For the second problem we found an alcohol-based cleaner. This worked well and in fact is what should. be used to clean the floors in the long term as a maintenance item.
Now we had a clean floor - mostly covered by urethane, but with some raw wood showing. To resolve the new urethane to old urethane adherence problem we came up with a novel product. Urethane is a form of plastic. That meant that we needed an agent that would bond plastic to plastic - like super glue! We need to diverge here. If you look closely at your credit cards you'll see that each credit card is really 3 pieces of plastic bonded together. There is a type of "super-glue" that bonds those three pieces of plastic together. Our problem was simpler - we only had to bond 2 "pieces of plastic" together - the old urethane to the new urethane and that is the manufacturer who solved our third problem. We use a derivative of that product that bonds all of your credit cards together to get our old urethane to bond to our new urethane.
The final problem was to find a urethane that would perform well, have no odor, no flammability, and dry quickly. Of course you know exactly who we went to for that product......Brunswick. That's right - the manufacturer of the bowling equipment, and also the manager of thousands of acres of wood floor bowling alleys, that are always in pristine condition. That product has no odor - alleys are only closed 8 hours a day. There is no flammability - with that much wood a normal urethane would off-gas enough fumes to burn an alley down with a cigarette ash. The floors are subjected to extreme use - 25 pound bowling balls are dropped on the wood thousands of times each day! And, they were using the same "super-glue" we had located.
At this point, we knew we had a system that would work, and happily we began testing the limits of the process.
116 Cricket Ave.
Ardmore, PA. 19003
888-202-3794 / 610-649-2000 / (F) 610-649-6463 / peter@sandfree.com