I've seen references (mostly from European and UK Dommes) to using a product called Finalgon as chem heat for CBT or after CP to enhance the burn. From what I can discover online it is made in Germany and contains two active ingredients, a synthetic form of capsaicin and a dilator that speeds and enhances absorption.

Opinions are mixed but many sources seem to rank it as more intense than the capsaicin creams often used here. I see it is available in North America online and was wondering if anybody here has used it?

This test seems to indicate it is quite intense but perhaps fades faster. In my experience with capsaicin the burn took closer to 30 minutes to fade.

https://www.patreon.com/posts/chemical-testing-27501361?l=fr