I used rust-o-leum garage floor epoxy over a previous painted garage floor, scraped and scrubbed the floor with rust-o-leum’s heavy duty degreaser, followed the directions to a tee, waited 7 days before parking on it, and after 3 weeks the paint started peeling off under the hot tires. says right on the can, good for hot tires. I called rust-oleum asking for a rep in San Diego area and of course they did’t have one, I scraped some slivers off the floor and sent them into their lab as instructed by the girl I talked to. they never responded and now refuse to address the matter. so now my predicament…what can I use to paint over the floor without sandblasting the
off first.
thanks
Jim
Replies
"over a previous painted garage floor"
in your sample scrapings, did the Rustoleum separate from the old paint, o r did the old paint peel up from the floor?
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I used the Rust-o-leum epoxy floor paint on a new slab that was "over finished" by the finisher. The top surface was too slick for it and it started to come up. Sent samples to them and they replaced the paint. I still had to scrape, sand, and power wash after trying lifting it off with duct tape (there are some things duct tape won't do !) That was four years ago. It is holding up "pretty good" but still has some peeling at the joint of old /new. I will not use it again. When I move into my new house I will go with something better like "U-COAT IT" (about 4-5 x more expensive). Looks like another "you get what you pay for" lessons.
Bruce
I've only seen that product used on new concrete, and it performed well.
Otherwise, few things are as difficult to paint well than a concrete floor. I have trouble believing the things that do work well, for as long as they do!
Yes, he says he scraped and scrubed but nothing about sanding or rinsing. I suspect poor prep. Epoxy paint is good stuff, but I really wouldn't expect it to hold well over old paint in garage slab conditions.
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I used the same product on a new garage floor and am pleased with the results. There is a little peeling at the OHD where there was too much moisture in the concrete, but that was my bad for not letting the edge dry out enough.
As for going over a painted surface, saw that on a shop where I used to work. The concrete was sealed when placed, then a few years later some type of paint/coating was used over that. It all peeled up (well, not all--probably 60% in ugly splotches).
I would get down to bare concrete before trying again. Chemicals may work, but you might check into having someone use a grinder to take the top surface off. Just make sure it has some "scratch" left for the new epoxy to have something to bite onto. IMO it would be easier than sandblasting.
Ugh.Way back in the dawn of time, when I was a young man, I got a job of prepping a bunch of concrete shower floors for epoxy coat. These were in a motel and had been painted probably twenty coats of oil based enamel over the years.I had to grind a lot of it after some heat scraping. The epoxy specialist would not warrantee his work on anything but cleaned scratched crete surface.it came out beautiful though. Had a deep marble look to it. But I ate a lot of lead and such on that job
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That does sound like a nasty job. I'm picturing some of the concrete shower stalls I've seen...
Don't concrete cutting companies typically do surface grinding? I'm thinking walk-behind rotary grinder, although I can't say as I have every seen one.
No way you'd have fit a walk-behind unit in those showers.This was a small town and limited specialty people.
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I was thinking a walk-behind for the OP's garage.
I can picture you in a dinky little shower wrestling a machine like that...
LOL, I C
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One typical method of preping is to use a shot blaster. It shoots pellets, I think of steel, into the surface and sweeps up the dust.Rough grinding would also work.One manufacture of industrial coatings recommend that the floor has a roughness equivalent to 80 girt sandpaper..
William the Geezer, the sequel to Billy the Kid - Shoe
How about etching it with muriatic acid. It will take off the cement and leave exposed sand."There are three kinds of men: The one that learns by reading, the few who learn by observation and the rest of them have to pee on the electric fence for themselves."Will Rogers
Etching will work in some cases.Two problems. One is that the fumes can corrode metal in the area. So a typical cleaned out home garage would only have the door tracks and with the door open should not be a problem. But in my case I have enough equipment in there that I when I do it I want to do it in sections.The other problem is that the acid might not eat through the paint enough. Or be slow enough that bare parts or over etched..
William the Geezer, the sequel to Billy the Kid - Shoe
I don't think it will touch the paint at all. I was recommending it just as a way to get some bite before painting on bare concrete.
I have seen the fumes corrode metal pretty badly. I worked with a guy briefly that was doing river rock inside a bathroom. He was using the muriatic acid to clean the stone.
"There are three kinds of men: The one that learns by reading, the few who learn by observation and the rest of them have to pee on the electric fence for themselves."Will Rogers
One reason coating concrete can be so problematic is that concrete is porous. Moisture coming up from below will cause nearly every type of covering to fail. This can be a problem even in desert areas.
I lived in a converted garage for about 15 years and we never got paint to stick very long. We just kind of gave up after a while."There are three kinds of men: The one that learns by reading, the few who learn by observation and the rest of them have to pee on the electric fence for themselves."Will Rogers
Rather than a shot blaster that uses a disposable medium (the shot) use a needle scaler. Takes a lot of air."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
I have never used one. But I thought that with the shotblaster that you sweep up the pellets and reused them..
William the Geezer, the sequel to Billy the Kid - Shoe
Maybe, but doesn't the crud that gets blasted off the concrete contaminate the shot?"Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
needle scaler ? what's that
Small ones are about the size of a die grinder. The back end has a air hose connection, theere's a trigger in the middle. the working end varies in size, about an inch dia, with a bunch of "needles" or steel pins about the size of a 12 ga wire. Pull the trigger, the pins dance in and out like miniature chipping hammers, removing paint, rust, etc off the steel or concrete.
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_12817_12817
"Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Edited 6/29/2009 6:54 pm ET by FastEddie
Thanks
Jim,
SIgn in on the Garage Forum http://www.garagejournal.com/forum/ and put your question in the flooring forum. There are a few manufacturers and garage flooring installers there that will answer your questions. Just reading some of the posts will probably give you a good idea of what you have to do.
Bill Koustenis
Advanced Automotive Machine
Waldorf Md