What was found
(CAN) AFTER FLIGHT, PILOT SAW ON RT PROPELLER, ONE PROP DE-ICE PAD MISSING ON ONE BLADE. AFTER INSPECTION OF THE DEFECT, WE SAW THE GLUE WAS NOT HARD. THE DE-ICE PAD WAS INSTALLED AT O/H SHOP WITH NEW KIND OF GLUE. WE REMOVED THE OLD GLUE AND REINSTALLED A NEW DE-ICE PAD WITH CONTACT GLUE (3M 1300L). AIRCRAFT RETURNED TO SERVICE AFTER REPAIR.NOTE: IT'S NOT THE FIRST TIME THIS PROBLEM APPEAR DUE TO THIS NEW KIND OF GLUE.