fr.wikipedia.org | Jean-Guy Couture — Wikipédia
![](https://www.annuaire-des-loisirs-creatifs.com/wp-content/uploads/2023/04/837738389-550x300.jpg)
Build. Sto AirSeal is a water-based, vapor permeable, fluid-applied air and water-resistive barrier membrane. It can be installed according to one of three specifications depending on project requirements. The Substrate-Driven specification requires 20-mils WFT of Sto AirSeal (potentially more on CMU).