All Stuttgart controls manufactured in Woodward Krakow,
PCBA's (Printed Circuit Boards Assembled) are conformal coated (easYgen-1500/2000/3000/3000XT/LS5/DTSC200/IKD1M)
Get information about this conformal coating material here https://www.peters.de/en/download-center we use 1307 FLZ
See here test reports of this coating