How to fill the joint between a door frame and the wall with one-component PU foam. The foam fixes the frame and gives the joint thermal and acoustic insulation.
Use gun-grade Soudafoam Gun with the Soudal Compact Foam Gun, or Fill & Fix Foam if you don’t have a gun. For fire doors, use Soudafoam FR, fire-rated up to 240 minutes. Flush the gun with Gun & Foam Cleaner when you finish.
The PU foam usage manual covers gun and straw foams in more detail.