Preventing Pipe Clamp Stains

By Robert Robillard on Workshop tips

Prevent stains on wood from black pipe clamps


Dear Concord Carpenter,

I recently tried your “pipe clamp extension clamp” on a project and it worked great!!  Thank you for taking the time to post that tip and video.

I have another questions for you.  How can I prevent the wood that I am clamping from getting stains on them from the black pipe clamps?

Thanks, Rodrigo


Dear Rodrigo,

Great question.   Some wood glue usually drPreventing Pipe Clamp Stainsips and adheres to the pipe clamp. Once there it contacts the pipe the water in the glue reacts with the iron in the pipe and can cause a black stain on the wood, especially with a tannin rich wood like oak.   The stain or dollop of glue can also dry and interfere with the pipe clamp sliding operation.  

The goal is to keep your metal pipe clamp separate from your wet glue joints.  To solve this problem I’ve seen woodworkers use pvc pipe cut offs as spacers, 2 inch strips of wax paper, or cover the pipe with tape.  I personally use blue painters tape and apply this tape directly to the clamp bar .

Your stain problem solved!



Workshop Tip:  Extending Pipe Clamps

Workshop Tip:  One Handed Clamps

Pipe Clamp Storage

Woodworking Glue Jig

Pipe Clamp Video



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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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