What is the nemesis of foam caulk?

foam caulkwe often use it. it is a good polyurethane foam filling material that can waterproof and seal. so what’s the nemesis of foam caulk? let’s take a look with the author. 1. what is the nemesis of foam caulking? polyurethane foam caulking agent‘s nemesis is water and oil. if there is water and oil,…