I think I messed up

[PJP]

I think I messed up... in the pictures below you can see a hairline crack in the foundation. Well, I bought some fast set quikrete crack sealer and put some in the crack and it ran down the crack, around the thimble. And I’m pretty sure it’s flammable if exposed to flame. What do I do now?

It is not mortar, it is some type of epoxy that hardens up when set. The bottle also says not to let it go over 140 degrees. Which I obviously didn't read until after

Do I have to chisel out the foundation wall now to get my insulated thimble back to the exterior chimney so I can have a 1” clearance?

Can I still run my 6” pipe through thimble and just put 1” chimney insulation around the 6”? It is an 8” thimble.

There is a small layer of mortar in thimble right now but will be removed obviously. Thanks

 

[begreen]

Is this sealer inside the wall above the thimble?
What 1" clearance is this referring to?

 

[Max W]

From the safety data sheet on QUIKRETE® Product Name FASTSET CONCRETE CRACK REPAIR it looks like this can have some serious health effects heated.

If this is the same stuff you used it is a polyurethane based adhesive. I will be a b____ to remove but I don’t think you have a choice. A few days ago I used 3m 5200 polyurethane to repair a granite hitching post that got knocked over, broken off at its base by a contractor’s truck. It makes a permanent bond. I had a little thin excess in one spot to get off after it set. A wire brush barley touched it and I mostly let it be. Good chance you end up replacing the thimble unless it was dirty and it didn’t bond. An air impact chisel would be a tool to use. I would guess that it is inert at room temp once it cures but a mask wouldn’t hurt. Heated look out.

Special Instructions:
Firefighters should wear NFPA compliant structural firefighting protective equipment, including self-contained breathing apparatus and NFPA compliant helmet, hood, boots and gloves. Avoid contact with product. Decontaminate equipment and protective clothing prior to reuse. During a fire, isocyanate vapors and other irritating, highly toxic gases may be generated by thermal decomposition or combustion. Exposure to heated diisocyanate can be extremely dangerous

 

[PJP]

Is this sealer inside the wall above the thimble?
What 1" clearance is this referring to?

Yes, it made its way down the crack from the top where the foundation meets the sill down around the thimble, to the crack below the thimble. I’m thinking I should core out 14” back to the chimney and then put an insulated wall thimble from the exterior masonry chimney to pass through the foundation so any of the sealer is outside of that 1-2” clearance and won’t be heated when burning a fire… thoughts?

My other thought was to keep the original thimble, put a 6” pipe through and then pack insulation around the chimney pipe passing through the thimble to keep heat away from sealer.