Is Conformal Coating Waterproof?

Typically, conformal coatings are not waterproof. These coatings are semi-permeable, so do not fully water-proof or seal the coated electronics. They protect from environmental exposure, improving the durability of the electronic device, while still being practical to apply and repair. The exception to this are parylene coatings, 2-part epoxy coatings, and potting compounds. Parylene coatings, epoxy coatings, and potting compounds are not offered by Chemtronics, so are outside of the scope of this article.