This is easily solved with the tab repair resin and hardener. To attach a new tab, or reattach the old tab, sand the area lightly to remove oxidation from the old defroster grid. Apply the resin and hardener as per the instructions, at... 

• Tab Repair (Combined 0.24 Oz.) for DRK672 for Master Defroster Repair Kit

WARNING: This product contains a chemical known to the State of Cali... 

 Silver makes the difference bonding rear window defroster tabs. This best seller bonds defroster tabs to rear defrosters. The conductive silver adhesive bonds aggressively forming the electrical and structural connection in one sim...