Caulking Slab/Foundation corner joint (Radon)
![](https://secure.gravatar.com/avatar/5008b50b6dd64a6e2b342aae3632ec28?s=52&d=https%3A%2F%2Fimages.greenbuildingadvisor.com%2Fapp%2Favatars%2F200x200%2Fk.png&r=g)
Hi we have an insulated basement slab that was notched where it joins the foundation wall on the top. It is supposed to be caulked/sealed at the notch where foundation wall and top of slab meet, to air-seal/radon-seal. What would be the proper sealant to use for this joint, around the interior perimeter of the basement?
thanks in advance!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
![](https://www.greenbuildingadvisor.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb1.png)
![](https://www.greenbuildingadvisor.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb2.png)
Replies
We used Prosoco Air Dam. So far, it's holding up well.
https://kimchiandkraut.net/2017/11/15/basement-slab-for-passive-house/