Platinum vs peroxide cure: silicone buyer checklist
A cure system helps describe silicone processing. Food-contact or medical suitability still needs evidence for the specific formulation, finished part and intended use.
What the cure system tells you
Platinum addition cure avoids peroxide decomposition residues. This does not mean zero extractables. Low-molecular components and processing conditions still matter. HCR can use platinum or peroxide cure; HCR is not a synonym for peroxide-cured material.
When post-curing matters
WACKER describes post-curing for both addition-cured and peroxide-cured silicone. Its purpose and conditions depend on the grade and application. Do not assume platinum cure eliminates post-curing, or that one time-and-temperature recipe makes every peroxide-cured part suitable for food contact.
Compare evidence, not labels
Request the exact compound designation, cure and post-cure instructions, finished-part test results and intended contact conditions. Compare cost only after agreeing those requirements. Material supplier documents describe their compounds, not a certification of Silicraft.
Before requesting a quote
Send the drawing revision, application, material preference, critical dimensions, annual quantity, delivery market and required evidence. Feasibility, testing, price and timing need written project review.
Buyer questions
Can peroxide-cured silicone be used for food contact?
Some grades can, subject to their processing instructions, use restrictions and applicable finished-article requirements. The cure name alone cannot establish compliance.