Certifications are used to separate conformal coatings from general-purpose varnishes and shellacs. There are dozens of user and industry specifications, but the two major certifications are most commonly referenced:
IPC-CC-830B / MIL-I-46058C
This standard originated with the military standard MIL-I-46058C, which became obsolete in 1998. The civilian version IPC-CC-830B is nearly identically, so if a board passes the IPC spec it should also pass the MIL spec., and visa versa. IPC-CC-830B is a battery of tests that includes appearance, insulation resistance, UV fluorescence, fungus resistance, flexibility, flammability, moisture and insulation resistance, thermal shock, and hydrolytic stability. All Chemtronics Konform coatings are IPC-CC-830B certified.
UL746E
Underwriters Laboratories (UL) is considered a credible and reliable safety certification body worldwide, and UL certification is commonly required for consumer goods. UL746E tests for electrical safety and flammable safety of the coated electronics. For electrical safety, there is a battery of tests similar to IPC-CC-830B, but with a cycling current load to constantly measure the failure of the isolative properties of the coating. The flammability test uses the UL94 standard like IPC-CC-830B, which involves attempting to light the cured coating with an open flame and observing the sustainability of the flame.
Once a coating has passed UL746E, it can be registered with UL and assigned a registration number. Products certified and registered to UL746E standards can include the UL symbol (which looks like a backward “UR”). To maintain the registration, a coating much be retested annually.
Konform AR Acrylic Conformal Coating and Konform SR Silicone Coating are both certified and registered for UL746E.