Air and vapour barriers
Which is the best caulk or sealant for caulking windows and bathrooms etc?
...caulks are not as benign, but very good for many purposes, and they are easily available. Polyurethane caulking is quite durable, but mostly suited for outdoor applications. And then there are silicone caulks in a bewildering array of purity levels (and prices).
Oil or resin-based caulking:
Caulks that are oil or resin...