Frost Fighter Defroster Repair and Replacement Kits
Frost Fighter Uni-Clip Kit

Defroster Grid Repair Kit - NEW!

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2100 Grid Repair Kit fixes rear window defrostersFrost Fighter Defroster Grid Repair 

High Performance rear window defroster grid repair 

NEW! - Improved 2120 Frost Fighter Grid Repair material features improved electrical properties, better bonding and uses the heat from the defroster to flash cure for fast defroster grid repairs. This is a breakthrough product improvement.  

Grid Repair Kit
Use when rear window defroster grid lines stop working.
The fine horizontal heating elements on defrosters can be easily damaged. The damaged grid area is masked off and repaired by painting the Frost Fighter grid repair conductor over the damaged area. The conductor bonds aggressively, dries quickly and is color matched for invisible repairs.

This is an easy repair you can do yourself and save the high cost of glass replacement.

Each kit comes with full instructions, grid masking tape, cap brush applicator and enough conductive repair material for several repairs. Each bottle contains 6 grams of conductive grid repair material, enough for several repairs.

Doctor Defroster Grid Repair Video  Order Here
2120 Frost Fighter Defroster Grid Repair - $19.95

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Doctor Defroster Video How-To Video Series

Need defroster tabs or connectors? See the Uni-Clip Defroster Tabs for replacement tabs and connectors. Reattach the defroster tab? The Tab Bonding Kit is a good choice.

Repair Defroster Grid Breaks
If the defroster clears only part of the rear window, it’s usually a sign of a broken horizontal grid line. The first step in repairing this type of damage is to locate the break by visual inspection. The smallest break or crack can cause the defroster to fail.

rear window dersoter grid not working If the break in the defroster grid is not obvious after close visual inspection, use a volt meter or 12 volt lamp to help locate the damage. Turn on the defroster and touch one meter lead to each of the wide vertical bars along the sides of the defroster. The reading should be between 12 and 14 volts. If the volt meter shows a negative reading, reverse the leads.

Now take readings at various places along the horizontal lines of the grid to isolate the break. When you pass over the break, the reading will change sharply.

Simple voltmeter alternative
If you do not have a volt meter you can use the Frost Fighter Test Lamp. This simple trouble lamp makes it easy to find the breaks in defroster grid and features a 12 volt lamp, alligator clip, soft probe and long wire leads.

Once a break or breaks in the defroster grid has been located, it’s time to consider how to repair the problem.

Repairing Defroster Grids
The NEW highly conductive 2120 Frost Fighter material is designed to repair grid damage. Use the tape to precisely mask off the damaged area of the defroster. There may be more than one break in the grid so locate all the damage before proceeding. The grid kit can repair breaks up to five inches.

After the damaged areas have been located and masked, apply the repair material using the cap brush. Frost Fighter grid repair kits use a highly conductive silver polymer repair compound. This polymer bonds aggressively to glass and provides maximum electrical conductivity.

Removing the masking tape while the conductive repair coating is still wet for uniform highly conductive defroster repair.

Heat defroster grid repair Flash Cure to finish repair
Allow the conductive repair coating to dry for ten minutes at temperatures above 70F (21C) degrees. If the temperature is below this use a heat source to warm the repair area for the ten minutes needed.

Now turn on the defroster. The heat from the defroster to cures the repair  in about 10 minutes. The defroster can be used at this point.

 The conductor is color matched to the reddish brown colors used in automotive defrosters for nearly invisible repairs.

Preview Grid Kit instruction sheet
Adobe PDF (300 Kb)

Damaged defoster grid repair
Masking off defroster grid damage
Repairing defroster grid by brushing on coating
Cure and remove tape
Defroster grid repaired with Frost Fighter kit

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