How does foam caulk work?

It can be used. The foam caulking agent is specially designed for plastic steel windows. It can even be used for wall cracks. Generally, it will not deteriorate due to exposure to the sun and rain. It is also light and can be used after drying. Its solidity is relatively good, because it is expandable, so as long as it is fully applied, there will be no leaks. Just apply it a little more and cut off the squeezed out part before it is completely dry. Hair growth will never occur. Don't worry about it, my friend.