angle grinder?

[nokkieny]

I am prepping for epoxy, the floor is "unused" so I just need to rough up the surface. From what I have gathered I need to get some type of walk behind tool at home depot with a diamabrush attachment, and spend a long time cleaning up the dust.

What I am confused about is what exactly I need for the corners/tight spaces
will this work:
http://www.amazon.com/gp/product/B000BM6BMI/?tag=atomicindus08-20
and
http://www.amazon.com/dp/B003XXE0RA/?tag=atomicindus08-20

 

[dcs Inc]

I'd suggest you find a Harbor Freight and get one of their 4" grinders. Throw it away after you are done. I think I spend 12-16 bucks a piece for them. I get them 3 at time and have had a few last awhile. They have a cheap diamond cup there also.

On the diamabrush and dust. Use it wet. Well, just wet enough to keep the dust a bay. A dust pan and stiff scraper can handle most of the sludge then wash it real good. If you go dry make sure you have a good breather and plenty of plastic to mask off everything.

 

[Shea]

Good call on the 4" grinder from Harbor Freight. I've done that myself when I was short on a grinder for a small job. No need for a homeowner to invest in quality tools that most likely with be used only once.

 

[JamieK]

I am prepping for epoxy, the floor is "unused" so I just need to rough up the surface. From what I have gathered I need to get some type of walk behind tool at home depot with a diamabrush attachment, and spend a long time cleaning up the dust.

What I am confused about is what exactly I need for the corners/tight spaces
will this work:
http://www.amazon.com/gp/product/B000BM6BMI/?tag=atomicindus08-20
and
http://www.amazon.com/dp/B003XXE0RA/?tag=atomicindus08-20

The guy at my Home Depot had no idea what I was talking about with the Diamabrushes.

 

[Rjjencke]

The guy at my Home Depot had no idea what I was talking about with the Diamabrushes.

The Diamabrush is not available in all states as of yet. They are not in AZ either. Go to their website and call them. They can tell you which HD's might have them. I was very disappointed when I found out and am now considering using the Edco grinder.

 

[pauloman]

I couldn't' imagine prepping a floor with a 4 inch wheel. Note that some floors are not suitable for an epoxy surface no matter what sort of prep you use.

You could acid etch or use high pressure water (really high pressure water can remove all the concrete and leave the rebar in place).

Most homeowners just sweep the floor clean and apply the epoxy. Surprising how most get away with this not recommended approach. Note that if super surface prep was always 100% required, none of the overnight internet epoxy vendors would be able to stay in business.

see www.epoxyproducts.com/floorlinks.html for other options.

paul

 

[dcs Inc]

The 4" grinder is for cutting into corners. If you power wash a floor intended for epoxy be prepared to wait quite awhile for the moisture to gas off, especially if it's porous. Use a calcium chloride domed kit to measure he moisture content to be sure. It's also a really good idea to do a pH test also. Many a slab have failed because of a high pH reading.

You can go here and read a blog entry I just made on this subject. I'll be writing more soon. http://www.elitecreteindiana.com/category/blog/

 

[bansky]

just pour some muriatic acid in the corners and uneven spots the grinder can't get to.

 

[Prepman]

Rent an Edco 10" for a bout a half aday should do it and use 30/40 diamond segments. I just tried a Dynabrush, but it is recommended to use water when grinding. You have to wash and wait a minimum of 3 days to coat. Acid etching is the least desired method for prep. If you dry grind, vacuum like you mean it, slowly and get the dust out of the pours. My vacuum guy is the most important guy on my floor team.