Repairing foundation. Condensed version, pier and beam, 2x8s sitting on concrete piers, then the "skirt" on the house is something like cement backer board with stucco. The concrete had a few hairline cracks and in the hammering/jacking didn't make them any better.
I'm looking for some kind of product that I can maybe spray on or paint on to fill/cover those cracks. It doesn't need to repair, I'm just trying to keep bugs, outside air, and other things out.
I thought about expanding foam, but they aren't big enough to get the foam into. Only one really has any daylight visible through it. I thought about butyl tape (like dynamat) but it's in pretty awkward places with multiple curves and really rough surfaces
Then I thought about the black stuff they spray on the outside of basement walls before backfilling, but not sure if that can be scaled down. I have a schutz gun.
Henrys roof patch?
Ideas?
Smear some Quad on them and never worry again
flex seal is a good idea, but I'm afraid I would have to build it up pretty heavy, and I'm not sure how it would hold up to movement if there is any. I'm sure the stuff I just did will settle pretty well in about a month, I'm just thinking of 10 years from now when it has re-settled another 1/8". I suppose I could spray a couple heavy coats, lay some mesh tape in it, and hit it with another couple coats. Same probably goes for the bedliner. I have a few cans of really awful bedliner that I tried and didn't like. Maybe I could try it since I at least have it.
I also have a can of Henry's fibered roof coating. Not sure if that will forever make my house smell like tar.
I've used this before with very good results:
https://www.amazon.ca/LePage-Filla-Mortar-Filler-394003/dp/B019GIS4EK
not sure of availability in your area though.
Henry sells a foundation dampproofing compound, it can be brushed on (mopped on). I used it on my new build, it was an asspain to do a whole foundation, but definitely would be easier for a small area. Only comes in a big pail though, and does have the asphalt and solvent stank.
Another Henry product I used in my new build is Air-Bloc LF. It's more like seam sealer or a putty than caulk. You dispense a line and then tool it down with a putty knife. I used it on my house sheathing at seams, joints, and penetrations; it could work for your application.
Butyl tape might be good too, I found the thinner butyl flashing tape sold for construction is fairly flexible and conformable, and also adheres aggressively to concrete and wood. You want the 20mil rather than 30mil. I used a few rolls of Protecto Wrap in various places on my house, you can also get it under the FortiFlash brand and many others.
All of this is great info. Thanks, all.
The self adhesive ice and water shield for roofing might work as well. You could trim it to cover just what you need.
I tried some butyl tape (I had some old dynamat) and the surface was too rough. The inside of the surface has "casting flash" from where stucco had been squished into the gaps in the forms. Kinda knife-edge concrete that was tough to negotiate.
For now I used three heavy coats of the spray on bedliner. I had bought a bunch at a surplus store and tried it on the bedrails of my truck and was supremely disappointed. It might work in this application since it will never see any abrasion. I basically started with a super-wet coat, let it dry for a day, then hit it again with two light coats.
Either way... too late now, the subfloor is glued and screwed :)
