Replies

1. 
   florida | May 02, 2022 11:03am | #1

   Buy a small container of epoxy and use that instead of mortar.

2. 
   anonymous11 | May 02, 2022 03:47pm | #2

   Thanks. Question: If I repair with epoxy, then I sand and paint, when later I drill again in any area it would be safe and strong?

3. 
   ct_yankee | May 02, 2022 05:10pm | #3

   My thoughts - if you can or intend to use the existing holes:
   - Clean out the existing holes with compressed air.
   - Find an appropriate size concrete screw for the oversize holes.
   - If necessary, redrill the holes to match the slightly larger concrete screws.
   - Clean out the enlarged holes with compressed air.
   - Just before inserting the new screws, squirt a bit of epoxy or CA glue into the holes.
   - Fasten away!
   If all you're trying to do is fill the original holes, then I'd recommend filling them with epoxy and once cured, prep for painting. I would NOT used mortar - too brittle and has limited bonding capability. I would not be too concerned about drilling holes for new anchors anywhere near by.

1. 
   anonymous11 | May 02, 2022 05:22pm | #4

   "I would not be too concerned about drilling holes for new anchors anywhere near by"

   Thanks so much. That's the answer i was looking for

4. 
   fsmyles | May 02, 2022 06:13pm | #5

   It's not necessary to use a concrete bonding agent. Instead, blow out the holes with compressed air to remove any dust which would prevent proper bonding. Then, use hydraulic cement as a hole filler. Hydraulic cement expands as it dries and therefore will key in best so that a bit won't wander and break it out.

   https://www.quikrete.com/productlines/hydraulicwaterstopcement.asp

   Frankie

5. 
   tfarwell | May 03, 2022 08:35pm | #6

   A cold joint isn't going to matter for holes.
   - Clean the holes out - get rid of all loose material
   - Wet the holes, so when you put mortar into them, you'll get good adhesion. This is usually the "cold joint" problem on small repairs. If you put wet mortar on dry masonry, it's going to loose the moisture too fast and fail.
   - Pack in some repair mortar.
   - Let it cure for at least 24 hours. I like to go 72.
   - Drill your new holes

   Or... Get some lead inserts to bring the current hole size down to what will work. If the holes aren't too big, I'd think this is the east route: https://www.google.com/search?q=lead+screw+wall+inserts&rlz=1C1GCEA_enUS950US950&oq=lead+screw+wall+inserts&aqs=chrome..69i57.5564j0j7&sourceid=chrome&ie=UTF-8

1. 
   anonymous11 | May 03, 2022 09:23pm | #7

   Thanks man! Very helpful

2. 
   anonymous11 | May 04, 2022 07:25am | #8

   Question? If I paint the wall so is not visible where the holes where, would it be safe drilling anywhere in the wall after the restore?

1. 
   tfarwell | May 05, 2022 03:06pm | #9

   Yes. There should be no issue.

6. 
   anonymous11 | May 05, 2022 04:23pm | #10

   Thanks for your help!

7. 
   richreel | May 19, 2022 05:55pm | #11

   I suggest You to use epoxy.