They are under no obligation to disclose 100% of the composition of their products. Under REACH and ECHA, they might be required to disclose if (IIRC) they export > 1 tonne of the product into the EU. Typical formulations look something like
PFOA was used in the PTFE mfg. process, so we asked for equivalent PTFE formulations that were not mfg. with PFOA. The revenue they get from medical devices was trivial compared to non-medical (waterproofing) applications and accounted for 90% of Regulatory risks, so they often met requests with a "take it or leave it" response.
Given the sclerotic pace at which government agencies move to approve changes of magnitude, and given the MASSIVE testing burden required, this effectively meant "take it".
50% water 35% solvent 5% colorant (with pigment name) 10% Proprietary / Trade Secret PTFE
PFOA was used in the PTFE mfg. process, so we asked for equivalent PTFE formulations that were not mfg. with PFOA. The revenue they get from medical devices was trivial compared to non-medical (waterproofing) applications and accounted for 90% of Regulatory risks, so they often met requests with a "take it or leave it" response.
Given the sclerotic pace at which government agencies move to approve changes of magnitude, and given the MASSIVE testing burden required, this effectively meant "take it".