if you are installing, replacing, or insulating any window or door that opens, closes, or slides. Always pay the extra $2 for the blue can for fenestration work. A Pro Secret: The "Big Gap Filler" If you have a massive gap (over 1.5 inches) around a door frame, do not use either can. Buy Great Stuff Pro (gun-grade foam) with a dispensing gun. It gives you precise flow control and less waste. But for the average homeowner—stick to the blue can for windows, the red can for everything else.
The short answer is . Using the wrong foam can bow a window frame, prevent a door from closing, or even void a product warranty. great stuff window and door vs gaps and cracks
If you have ever stood in the insulation aisle of a hardware store, you have seen the red and blue cans. You have probably asked yourself: Does it really matter which one I grab? if you are installing, replacing, or insulating any
The foam that saves you $5 today (by buying the red can) will cost you $500 to fix a bowed window tomorrow. Buy the right tool for the job. Buy Great Stuff Pro (gun-grade foam) with a dispensing gun