https://www.reksonpolymer.com/Silicone-Inflatable-Gaskets.php

 Rekson Silicone Inflatable Gaskets is made from high quality Silicone Rubber conforms to FDA 21 CFR 177.2600 for Food grade criteria suitable for various sealing applications. We have, to our credit, an experienced panel of engineers who strive to provide high-end materials.