SoudalSoudafoam Window & Door Genius Gun - 600ml

It works well. Managed to fill surround to 2 windows; needs leaving a long while until it’s fully expanded. Worked over a period of two days, nozzle didn’t block.Definitely need gloves.Just remember it hates daylight and so should be covered once complete, to avoid perishing.

DIY users who haven't tried this before should know that this product is messy, squirts and sticks everywhere, and risks fixing the door shut as well as draft-proofing it. Otherwise, brilliant.