The rear window defroster  is an essential feature for clearing frost in winter and removing fog during the rainy season. However, if the metal tab that connects the wiring to the glass comes off, power is lost and the defroster stops working.
In the United States, repairing this issue at a shop often means replacing the entire rear glass, which can cost over USD 500 for heated windows - and sometimes much more for premium vehicles. With ONE-HAND MIXING® conductive glue, you can easily reattach the tab yourself without costly parts or specialized tools.
This guide explains the simple, step-by-step repair process.

✅Repair Steps and Key Points

1. Surface Preparation

Clean both the metal tab and the glass bonding area thoroughly with alcohol. Residual dirt or oil can cause poor conductivity or weak adhesion.

2. Applying the Glue

Dispense ONE-HAND MIXING® with a single push. The two components mix automatically inside the nozzle - no manual blending needed. Apply an appropriate amount to the contact surface of the tab.

3. Temporary Fixing

Reattach the tab to its original position and secure it firmly with masking tape. Because the glue has low viscosity before curing, stable fixation is important.

4. Curing

Keep the tab fixed for at least 24 hours at around 25 °C(77℉). In colder environments, curing may slow down. Warm the area with a hair dryer for 15 minutes or more to help stabilize conductivity.

5. Connection and Testing

After curing, remove the tape, reconnect the harness, and switch on the defogger to check operation.

✅Important Notes When Using Conductive Glue

• During curing (the reaction phase), the tab may come off easily. Secure it firmly with tape for at least one day at 25 °C(77℉).

• Low ambient temperatures can delay curing and conductivity. Warm the area with a hair dryer for 15 minutes or longer to accelerate the reaction.

• You can also temporarily fix the tab with a standard glue first, then apply ONE-HAND MIXING® to connect the conductive path afterward.

✅Optional Accessory

For larger repair areas or multiple breaks, we recommend using the Brush-Type Mixer (sold separately). It allows surface coating and dispensing simultaneously, making the repair process smoother and more efficient.

✅Summary

Repairing a rear window defroster tab doesn’t necessarily require a repair shop. With ONE-HAND MIXING® conductive glue, you can easily achieve strong bonding, stable conductivity, and long-lasting reliability with a simple DIY process. This method is trusted by professionals in auto repair and by DIY users alike.