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Discussion Starter #1
I am in the process of renovating my basement. The old owner used compoud to try and seal the wall. Apparently, everytime it gets hot the walls start to sweat and the compound lets of this weird smell. I want to buy a 4 1/2 Sawtec Abrasive Grinding Discs But i don't know which one to get. here is the grit type

8 Grit Rough, aggressive removal of heavy coatings
16 Grit Heavy-duty removal of mastic, epoxy and urethane coatings
24 Grit Light-duty for light coating removal
36 Grit Light scuffing & cleaning with minimal removal

I will also use DRYLOK Off-White Flat Waterproofer to seal the wall.

let me know what you think.
 

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Depending on how smooth you want the finished wall, Start with the 8 grit, and work down the list until you get there.

Wear a respirator, you want to keep those lungs from becoming cemented.

AKA Silicosis.


ED
 

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what kind of 'compound ?' i too think drilok's great IF you own the company & want a bigger boat,,, if you want to stop water vapor, try kryton, zypex, or koster instead,,, if the $ scares you, think how much it'll cost in the future repairing what your dri*** doesn't stop...
joedue.com has some discs for sale that work well too - silicon carbide - comparable to zec wheels
 

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Discussion Starter #4 (Edited)
what kind of 'compound ?' i too think drilok's great IF you own the company & want a bigger boat,,, if you want to stop water vapor, try kryton, zypex, or koster instead,,, if the $ scares you, think how much it'll cost in the future repairing what your dri*** doesn't stop...
joedue.com has some discs for sale that work well too - silicon carbide - comparable to zec wheels
here is the compound walls.

https://i.imgur.com/L0fd7VI.jpg

https://i.imgur.com/gF44mnz.jpg

https://i.imgur.com/4dgYPyx.jpg
 

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I recently had to go through this for a concrete block wall in our basement. It had some sort of white compound applied to it. I’m not sure exactly what it was. The house was built in 1992 so I wasn’t concerned about asbestos, but that is something for you to consider. I tried a variety of methods to remove it. What worked best for me in the end was:
- A rotary hammer, set to impact only, along with a 1.5” spade chisel. With this I was able to chip off 70-90% of the material.
- The coarsest grinder disk that I could get. If you’re going down to concrete there isn’t any point in using a less abrasive disk.

I tried a grinder dust shroud, and although it did contain the majority of the dust it impeded my view of what I was trying to hit with the disk. In the end we put up a temporary plastic wall and made the mother of all dust storms inside there. I don’t suggest doing that unless you’ve got a half-face respirator.

Chris
 

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Discussion Starter #6
I recently had to go through this for a concrete block wall in our basement. It had some sort of white compound applied to it. I’m not sure exactly what it was. The house was built in 1992 so I wasn’t concerned about asbestos, but that is something for you to consider. I tried a variety of methods to remove it. What worked best for me in the end was:
- A rotary hammer, set to impact only, along with a 1.5” spade chisel. With this I was able to chip off 70-90% of the material.
- The coarsest grinder disk that I could get. If you’re going down to concrete there isn’t any point in using a less abrasive disk.

I tried a grinder dust shroud, and although it did contain the majority of the dust it impeded my view of what I was trying to hit with the disk. In the end we put up a temporary plastic wall and made the mother of all dust storms inside there. I don’t suggest doing that unless you’ve got a half-face respirator.

Chris
I've tried the grinder and indeed it was dust all over. I will try the spade chisel today and follow up with a grinder, fan and sealed off area pushing the dust through the back yard.

Anymore information would be great.

Thanks.
 

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I've tried the grinder and indeed it was dust all over. I will try the spade chisel today and follow up with a grinder, fan and sealed off area pushing the dust through the back yard.

Anymore information would be great.

Thanks.
I will agree on the use of the chipping spade to remove the very rough than to smooth use a bushing tool that will fit the SDS on hammer only it will remove all remaining compound.
 

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I will agree on the use of the chipping spade to remove the very rough than to smooth use a bushing tool that will fit the SDS on hammer only it will remove all remaining.

Thanks, i have never seen that bit Before. Greatly appreciate your help.

This would work, correct?

Have you had any experience with this bit? how is the dust Level?
 

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Keep the fan (assuming box fan) where you can keep an eye on it. The weight of the dust on the blades or the dust clogging the motor air vents may cause it to overheat.



If you have an air compressor that can drive an air chisel you may find that the pistol grip and weight of it are more comfortable that an SDS hammer.
 
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I will agree on the use of the chipping spade to remove the very rough than to smooth use a bushing tool that will fit the SDS on hammer only it will remove all remaining.

Thanks, i have never seen that bit Before. Greatly appreciate your help.

This would work, correct?

Have you had any experience with this bit? how is the dust Level?
No experience with that exact bit.
Yes I have used a Bushing tool many times it does a very good job of removing mortar from brick with out harming the brick surface but I used the Pneumatic tools.
You can check with Trow & Holden Barre, VT. 1-800-4514349 I think you can get one for the SDS tool. I had one special made by them it had a 4 sq/in surface worked great.
 

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Discussion Starter #11
No experience with that exact bit.
Yes I have used a Bushing tool many times it does a very good job of removing mortar from brick with out harming the brick surface but I used the Pneumatic tools.
You can check with Trow & Holden Barre, VT. 1-800-4514349 I think you can get one for the SDS tool. I had one special made by them it had a 4 sq/in surface worked great.
Well Hopefully i don't need a Pneumatic tool because i already have a SDS tool. This is a 7x7' space that needs work. More of like a weekend warrior thing. i would want to start ASAP. Here is one more bit

Well hopefully I don't need the
 

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Discussion Starter #13
forgot to recommend joe due: we'd have used grinder, vac, & zec discs
https://joedue.com/product-category/abrasive-disks-coating-removal/

also on ebay,,, you can check elberton, ga - https://www.milessupply.com - or http://johnsonmachineshop.com - [email protected]

probably the absolute best tool is a deckcrawler by aurand.net
Thanks. I ended up going with this one. http://www.mkdiamond.com/floorprep/cup_zek.html

Same thing just different company. waiting for delivery now.

Thanks
 
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