Skip to 4:20 for bubble gum seal test. Bubble gum engineering actually works! I'll demonstrate how to use gum to fix high pressure hydraulic leaks. We'll also explore how oil seals and bubble gum share some of the same ingredients. This comes as a surprise to most people, so it's a great way to win free beers. long term projects here: http://www.Patreon.com/AvE flashlight/shop rulers here: https://www.etsy.com/listing/464202928/