That's a perfect example of how the right small part can stop a big problem. I see it all the time in home projects where using the correct sealant avoids water damage later. It just shows that a little prep work pays off when time is tight.
Always keep a pre-made kit of common seals and gaskets in your truck for those rush jobs. I learned the hard way after scrambling for a specific size on a Friday afternoon. Weather stripping and butyl tape have bailed me out more times than I can count. What's your go-to spare part that you never leave without?