The final gaps! (Patreon)

Thermal cameras are great for highlighting those last little gaps in rooms like this - and my new best friend has a surprisingly handy light that I didn't spot in the daytime, but comes in super handy in murky spots like this! Sealed this side so I can then put some expanding foam on the other side to fill 70mm or so!

Love this tool - oh and one-handed caulkwork is super handy too!!