TITE SEAL Vented Drum CLOSURE Steel Bung Plug 55 Gallon Barrel Zinc Plated Buna Gasket 2TPBVent Tite-Seal Closures. Optional Drum faucet. Choose from poly or for more industrial applications, the brass faucet for extreme conditions. Since 1983, we have been the exclusive supplier of Tite-Seal plugs and Tite-Seal flanges. Tite-Seal flanges (octagonal) and round plugs meet all U.S. DOT and U.N. standards and are completely interchangeable with other similar brands of drum closures. Standard Tite-Seal closures are electroplated with bright zinc and yellow passivated against corrosion.