Mr. Dissolved Putty

Sealing up the gaps around my window frame took half the time I expected, the putty flows into tight spots without any mess. Even the cleanup was a breeze since it doesn't cling to your fingers the way most fillers do.

The viscosity is noticeably better than the SURFACER 500 I used before—it flows smoothly and fills gaps without dripping everywhere. Sealing up sections around my window frame took half the time.

The liquid putty is definitely easier to apply than I expected, and it seals up gaps pretty well. It's just a bit runnier than I'd like for vertical surfaces, so you have to work quickly.