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Garage Floor Epoxy Prep

29423 Views 61 Replies 18 Participants Last post by  daren
I know that there aren't a ton of painters that get into epoxy coatings. However, for those that do......

I like to follow the following steps:

Power Wash
Degreaser
Power Wash
Allow to dry 24 hours
Grind all problem areas, oil spots, tire tracks, etc
Muratic Acid Etch
Power Wash
Allow 48 hours to dry w/ Commercial Type Fans (4 of them) and 2 dehumidifiers running
Epoxy (2 Coats)
1 coat High Gloss Sealer

Here's my question... I use a 7" angle grinder when grinding problem areas. The next project I have coming up is like one big problem area. I feel that it would be in my best interest to rent a concrete grinder. Has anyone used one? How difficult / easy is it? How much of a mess should I expect? and finally, Where the heck can you rent one? My local rental place doesn't have one, neither does the depot or lowes. Any ideas?
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Any ideas?
Find the nearest rental franchise and have one of these bad boys trucked in.

Attachments

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Tough to use? (I know I shouldn't be asking pricing questions but.....) Any idea on what the cost of rental is? A rough estimate is fine - one, two, three hundred?
I know that there aren't a ton of painters that get into epoxy coatings. However, for those that do......

I like to follow the following steps:

Power Wash
Degreaser
Power Wash
Allow to dry 24 hours
Grind all problem areas, oil spots, tire tracks, etc
Muratic Acid Etch
Power Wash
Allow 48 hours to dry w/ Commercial Type Fans (4 of them) and 2 dehumidifiers running
Epoxy (2 Coats)
1 coat High Gloss Sealer

Here's my question... I use a 7" angle grinder when grinding problem areas. The next project I have coming up is like one big problem area. I feel that it would be in my best interest to rent a concrete grinder. Has anyone used one? How difficult / easy is it? How much of a mess should I expect? and finally, Where the heck can you rent one? My local rental place doesn't have one, neither does the depot or lowes. Any ideas?
If it's a simple garage floor then:
Way too much to that system.
Try H&C Concrete 2 part epoxy and follow their instuctions. $100 per kit and one kit does one standard bay.
Wash Floor with degreaser
Etch
Mop wash
24-48 hour dry time
apply epoxy ...add in anti slip and sprinkles

I have never had a problem with this system ...no tire lift at all.
concrete grinders relatively easy to use, but you can only get within 8 inches of the walls so you will need to use your grinder for the extra.
NEP

Not to get off topic, but would you believe me if I told you that I even brush these with my 2" Purdy? I get a sweet cross hatch decorative pattern. I go through alot of knee pads.
what the heck is that Scott? I know BM just sent out a flier saying they have a concrete grinder for rent. Is grinding that beneficial?
After you etch with acid you need to neutralize it with something basic. Like soap or baking soda. Why power wash before degreasing. I just sweep it out, hose it down to get it wet and then splash on degreaser and start scrubbing. I wonder if a scrubbing machine (like for floors) would work better and deck brushes? I always squeegee the floor to dry it faster. I like to have one person on the PW and one on the squeegee, gets it super clean and dry really fast. Over night drying, patch (the rustoleum patch is impossible to get smooth with a knife, is there a better tool or a better product to use?), let dry for I think it says another 8 hours, then coat.
I just get nervous about tire pick up. Since using this system, I have never had the issue. Actually, the first time I did it was to my own garage - New Stuff I like to test myself rather than testing on my client's property. When my floor peeled, I used about 6 coats of stripper to get the old stuff off, grinded the rest off, and used this procedure. I know it seems excessive (I have never seen a label that required all that prep) but it makes my feel warm and snuggly inside knowing I could eat off of that floor before I apply epoxy.

This H&C stuff, where do you purchase? And do they recommend grinding? The one concrete supplier that is known as the best in my area told me never to trust muratic acid over oil stains - He said better safe than sorry so I have instilled my trust in him and it has paid off. I don't mind the little extra work (I charge by the hour) but am curious about where to get a grinder. I don't need a drive behind (it's just a two car garage) but just a simple walk-behind would work fine.
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NEP

Not to get off topic, but would you believe me if I told you that I even brush these with my 2" Purdy? I get a sweet cross hatch decorative pattern. I go through alot of knee pads.
no sprinkles?
I wonder if brushing is a benefit because is helps the epoxy get into the pores and rough surfaces in the concrete? You know, like cedar siding and decks. Maybe I'm off base but it seems to make sense
Like I said, I may be wasting extra time by starting with power washing but it's the method I use because it's what worked for me when I did mine. There is one other thing too, By power washing everything off to begin with, I know what was just a light dirty spot that cleans right up and I know what areas will need special attention.
See how civil we are now.......

H&C is available at SW ... they have some good stock colors .. Brick Red, Pewter and a beige. Have you looked into getting a floor surfacer for your powerwasher? I am in the middle of ordering one this week from my SW rep. I have to strip a few garages from another painter who used a crappy latex one part concrete paint....$800 buck for the surfacer. Muralo has a nice kit as well. $75 bucks but no sprinkles or grip included and you need 2 coats. The H&C covers great (1 bay per mixed gallon) with a brush and thick nap 9". By far the best I've used. For $100 a gallon it better be.
i always grind them nowdays

ive rented 2 different types of grinders

both have been orbital with different types of heads/attachments

my rental co's charge me $100 for the day (typically $150) for the machine

the heads are wear items and cost an additional $35-$50

the results vary greatly between heads,,,,,,,,the scarifier will do a fair ammount of resurfacing/levelling, and adding a considerable ammount of tooth to the floor

one of the heads does a particularly good job of removing old coatings

i can get within 2-3" of the wall with theses machines

as much as i like to use these machines, i was mesmerized by the shot blasters at a pro show,,,,,,,

check out micro-toppings for concrete finishing, and acid stains also,,,,,,,,,the possibilities are endless
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See how civil we are now.......

.
:thumbsup::thumbup::thumbsup::thumbup: Welcome brother.
i always grind them nowdays

ive rented 2 different types of grinders

both have been orbital with different types of heads/attachments

my rental co's charge me $100 for the day (typically $150) for the machine

the heads are wear items and cost an additional $35-$50

the results vary greatly between heads,,,,,,,,the scarifier will do a fair ammount of resurfacing/levelling, and adding a considerable ammount of tooth to the floor

one of the heads does a particularly good job of removing old coatings

i can get within 2-3" of the wall with theses machines

as much as i like to use these machines, i was mesmerized by the shot blasters at a pro show,,,,,,,

check out micro-toppings for concrete finishing, and acid stains also,,,,,,,,,the possibilities are endless
Hey JOhn ....when you grind them how much of the concrete are you cutting in to? Do you skip all washing steps?
i havnt done (and probably wouldnt do if asked) a really greasy floor

the floors i have done have been in good condition (most of them are immaculate)

so i grind them and mop them,,,,,no muratic acid anymore

i used to hit them with muratic, but i dont see the need anymore

i dont remove much concrete, just turn it all nice and powdery, and get it looking uniform, and absolutely no polished/burnished or slick concrete left

the scarifyer head WILL remove some material if you want to,,,,,,,,,you could take a gap/uneven crack with a 1/4" lip, and level it out

i thin my first coat with xylene, and i use a nap designed for epoxy
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and dont tell the rental company this, but>>>>>>

use all of the weights they provide, and then put a box of tile, or somthing heavy on the top of the machine

maybe even stand on it for a stubborn spot
thanks John ....never thought of using a grinder ....i like it
grinding is the way to go
ive been trying some waterborne 2 part epoxies lately (on ceramic tile)

they seem very tough, pleasant to work with

but the clear bases (muralo) take 4 coats to cover

very tough stuff though

im curious whether anyone uses these for floors, and how they perform
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