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

Defroster Grid Repair Kit

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Frost Fighter Repairs Defroster Grids

Conductive defroster grid repair up to five inches

2100 Grid Repair Kit fixes rear window defrostersGrid Repair Kit
Repair scratched or broken defroster lines. The damaged grid area is masked off and repaired by painting the conductor over the damaged area. The conductor bonds aggressively, dries quickly and is color matched for invisible repairs.

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 15-20 five inch repairs.

Preview Grid Kit instruction sheet
Adobe PDF (300 Kb)

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. Be sure to have the work area well lighted.

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.

2100 Frost Fighter Defroster Grid Repair - $19.95
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If the break 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.

Voltmeter alternative
If you do not have a volt meter you can use the Frost Fighter Test Lamp. A really good way to identify broken or "worn out" lines is to switch on the defroster in cold/damp or humid weather to identify which lines are working and which are broken or damaged.  

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 2100 Frost Fighter grid repair material is designed to repair grid damage. Use the tape in the grid kit 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 small cap brush supplied. Frost Fighter grid repair kits use a highly conductive silver polymer repair compound. This polymer bonds aggressively to glass and provides maximum electrical conductivity.

Drying to finish repair
The material dries to the touch in 10 minutes and is usable in thirty minutes. The conductor is color matched to the reddish brown colors used in automotive defrosters for nearly invisible repairs.

Removing the masking tape after the polymer dries for a few minutes but before full cure leaves a uniform highly conductive defroster repair. It is important that repairs be done at normal room temperatures and that the conductor be allowed to fully cure before activating the defroster.

Heating to cure is a good idea
Repairs can be completed even more quickly by applying heat to the repair. A lamp or hair dryer can be used to speed curing.

2100 Frost Fighter Defroster Grid Repair - $19.95
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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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