Siliconen O-ringen | AS568-406 | Dash 406 | FDA-conform | 70 Shore | Rood (13/st.)

For my brewing setup I needed seals that could handle both hot steam and cold sanitizer, and these red rings haven't cracked or hardened in months of cycling. The 70 durometer feels just right, firm but with enough give to seat snugly every time.

The temperature range on these is what sold me—I can use them in my hot water setup without worrying about them breaking down. They’re firm but flexible enough to seat easily, and the red color makes them easy to spot during disassembly. I’ve already ordered a second pack.

The -80°F rating is exactly what I needed for a cryogenic lab fitting, and these red silicones sealed perfectly first try. The 70 durometer is pliable enough to work with but holds its shape well.