From that page: > The coating completely penetrates spaces as narrow 0.01mm. I would have thought that would make it very effective in protecting against whis

From that page: > The coating completely penetrates spaces as narrow 0.01mm. I would have thought that would make it very effective in protecting against whiskers in QFPs that might have a lead pitch of 0.4mm or larger. There's not a lot you can do under the bodies of BGAs and QFNs, but if you're worried about whiskers you're probably using QFPs instead. This app note suggests that Parylene and a few other dip-type conformal coatings do slow down tin whiskers, but don't stop their spread: https://www.maximintegrated.com/en/app-notes/index.mvp/id/5250 https://www.maximintegrated.com/en/app-notes/index.mvp/id/52...