Scotch Bung - Standard Bungs & Stoppers with 3/8 Thru Hole

We offer through-hole scotch barrel bungs in stock U.S./French size (55mm top x 44mm base x 48mm height), and in custom sizes to meet your unique needs. Standard thru-hole bungs are “natural” color (translucent white) but can be manufactured in custom colors and/or with custom printing, as needed. 

Through Hole Scotch Barrel Stopper Features

• Molded from FDA-approved food grade silicone
• 3/8” through hole for airlock device
• Available in stock U.S./French size or in custom sizes
• Natural color is standard; custom colors available

We also offer solid scotch barrel bungs without top grip lip, hollow whiskey barrel bungs with or without top grip lip, and whiskey barrel bungs with 3/8” thru-holes.

What is Silicone & Why is It Used for Bungs?

“Silicone” is the general name for a large family of polymers, including any synthetic compound consisting of repeating units of siloxane. Silicone’s most common form, silicone rubber, is utilized in a broad range of applications. This material is non-reactive, stable, resistant to fungal growth, and is well-suited to use in harsh environments and extreme temperatures (-75° to 450°F/-60° to 232°C). Silicone rubber maintains its dimensional tolerances at high temps and doesn’t become brittle in subzero conditions.

Thanks to its beneficial chemical and mechanical properties, and the ease with which it can be manufactured and molded, silicon rubber is an ideal material for scotch barrel stoppers. Ace Seal uses special, FDA-approved food grade silicone for all our barrel bungs.