• Complete repair kit for tradesmen and repairmen.
• Solders aluminum to aluminum and aluminum to copper.
• Repairs aluminum evaporators, tubing, ducts and gutters.

DIRECTIONS:
1. Clean the area to be soldered of all dirt, oxidation, oil and water. Use a stainless steel wire brush or other abrasive material. Do not use steel wool.

2. Apply LA-CO Aluminum Flux sparingly to the entire surface area to be soldered. If soldering tubing to a fitting or a coupling, apply flux to the tubing. Insert tubing into the fitting and rotate 1/4 turn to spread the flux evenly in the connection.

3. Apply heat to the solder connection. If soldering aluminum to copper, first heat the aluminum piece and then the copper piece. Use a light feathering action with the torch flame, always keeping the flame in motion. As the flux gets hot, it will begin to bubble. The bubbling action will increase rapidly as the flux continues to heat up.

4. While the flux is rapidly bubbling, apply the solder to the joint. Use the solder as a temperature indicator to determine the correct temperature for the solder as it is being applied. The solder should feed smoothly without resistance. Remove the flame as the solder begins to flow into the joint area.

5. Allow the connection to cool slowly, and then remove all flux residue with a damp cloth. Flush all flux residue from the inside of the tubing and recharge the system.