Cleaning old concrete garage floor

Old 11-16-19, 02:33 PM
Thread Starter
Join Date: Aug 2014
Location: US
Posts: 41
Received 0 Upvotes on 0 Posts
Question Cleaning old concrete garage floor

Skip the power-washing Rx because this is inside the garage and I don't want to get everything wet.

What products might work to clean this 35-year old floor that has embedded pet residues, oil drops from my Model T, paint, and who knows what else deposited and diffused into the concrete? Detergents have had a scant effect. How about a lye solution? TSP? A muriatic acid wash seems a little drastic, but how about that none the less? The floor is in great shape with a smoothly troweled surface and no cracks.
Old 11-16-19, 03:36 PM
Marq1's Avatar
Join Date: Sep 2016
Location: USA MI
Posts: 9,745
Received 1,210 Upvotes on 1,098 Posts
Dont skip the power washer, add a plate/surface cleaner and skip all the chemicals!
Norm201 voted this post useful.
Old 11-17-19, 03:49 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 45,783
Received 871 Upvotes on 762 Posts
Muratic acid won't have any effect on paint. I don't remember the brand name but I bought a degreaser at Lowes years ago that was fairly effective. IMO it would be best to empty the garage and use a pressure washer.
Old 11-17-19, 04:12 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 28,176
Received 2,272 Upvotes on 2,024 Posts
You would only do a Muriatic acid wash as a last step right before epoxying or painting the floor. If just trying to get it clean do not do it as it eats away the cement. Great for paint adhesion but it makes the floor rougher and any new dirt will be really hard to clean.
Old 11-17-19, 04:39 AM
Norm201's Avatar
Join Date: Sep 2013
Location: United States
Posts: 10,970
Received 729 Upvotes on 644 Posts
The trick with a power washer is not use the thin high powered setting. Use a spreader type or fan setting and do not get too close.

Thread Tools
Search this Thread
Ask a Question
Question Title: