Interstab CZ-11 – FDA / Medical is a calcium-zinc stearates-based heat stabilizer in paste form. CZ-11 complies with the stipulations for food contact as listed in the 21 CFR 181.22 – .30 & 178.2010 with no usage level limitations. Recommended for calendering or extruded blown film applications where zinc sensitivity of the PVC resin is a problem. Provides excellent heat stability, clarity and water blush resistance in food process tubing. Calcium to zinc ratio is 1:1.