As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING AND PROPELLER DE-ICE BOOTS FAILED AFTER BEING TREATED BY A PROCESS CALLED 'NU-BOOTS' WHICH USED 'MEK' TO REFURBISH THE RUBBER. BF GOODRICH DOES NOT APROVE THIS PROCESS. THE OWNER HAS GROUNDed THE AIRCRAFT UNTIL ALL BOOTS ARE REPLACED.