Glossary of elastomer processing
CP65 (California Proposition 65)
CP65 stands for California Proposition 65, a 1986 law of the US state of California (Safe Drinking Water and Toxic Enforcement Act). It requires businesses to warn consumers if products contain substances that are on the Proposition 65 list as known to cause cancer or reproductive harm.
What does Proposition 65 regulate?
The State of California maintains a list of several hundred chemicals classified as carcinogenic or toxic to reproduction. Anyone selling products in California that contain one of these substances above certain thresholds must provide a clear warning. The list is extended regularly.
Relevance for seals
Rubber and plastic parts can also contain listed substances, such as certain plasticisers (phthalates), components of carbon black or PAHs. For components that go into products for the US market, customers therefore often request a CP65 declaration from the manufacturer.
CP65 at SIEGEL
Our declaration on California Proposition 65 is available in the download area. For special requirements, we are happy to advise you on the right compound formulation.
Questions about this term?
Our technical advice
Do you have a specific application or a question about elastomer processing? Talk to us, we will help you with material, process and approval.