Learn how to patch a cracked metal pipe under your kitchen sink with pipe bonding putty and plumbing tape. After you have finished making the repair, use the sink without needing to worry about water dripping until you are able to have the pipe replaced by a plumber. 

Use The Following Materials

• lint-free cloths
• metal file (with coarse surface)
• pipe bonding putty
• rubber gloves
• bucket of warm water
• plumbing tape (with epoxy resin)

Dry And File The Pipe's Surface

Turn off the water supply at the main valve. Turn on the kitchen faucet to release any water that is stuck inside of the pipe that you are getting ready to repair. Dry the leaking pipe with a lint-free cloth. Use a metal file to roughen up the surface of the pipe. Press down firmly on the pipe while rubbing the file back and forth several times. The metal's coarse surface will make it easier for the pipe bonding putty and tape to bond in the following steps.

Apply The Putty And Tape

Put on a pair of rubber gloves. Mold a small amount of pipe bonding putty between your fingers until it is in the shape of a flat disk. Press the putty against the cracked portion of the pipe until it is secure. The putty will harden after several minutes. Fill a bucket with warm water. Place a roll of plumbing tape that contains epoxy resin in the water for several seconds. The water will activate the epoxy resin.

Pull the roll of tape out of the bucket and squeeze the excess water from it. Locate the end of the tape and press it against the pipe bonding putty. Wrap the entire roll of tape securely around the putty covered pipe, making sure that it is evenly applied. Press the end of the tape down firmly against the pipe until it is secure.

Add Water To The Tape And Wait For It To Dry

Dip your fingers in the bucket of water and press them along the tape's surface while still wearing the pair of rubber gloves. The water will help push the epoxy resin that is on the tape's surface down through the material. Wait for the tape to dry completely. Turn on the water supply and the kitchen faucet. Water will no longer be leaking from the pipe. It is important, however, to have the cracked pipe replaced as soon as you can because the materials used to make this repair are designed to temporarily stop leaks. Contact a company like Clean Plumbers BY Phillip Maurici Plumbing Inc for more information.