How to Shield a Guitar with Copper Tape

Copper tape is commonly used to line electric-guitar control cavities and pickguards. A connected conductive lining can help reduce unwanted electrical interference. A useful installation starts with the right adhesive, careful coverage and a verified connection to the guitar's circuit ground.

This guide covers tape selection and cavity-shielding checks. Follow the wiring diagram for your particular guitar and pickup system, especially for active electronics.

Compare conductive and non-conductive copper tape adhesives to choose the right electrical path for your project.

Choose copper tape with conductive adhesive

The copper foil conducts electricity, but an adhesive layer can separate one strip from the next. For overlapping cavity strips, look for an explicitly specified conductive adhesive and test the installed seams. A metal-looking surface alone does not establish conductivity through the bond.

APT copper foil tape lists conductive acrylic adhesive, a 1.4 mil copper backing and 2.8 mil total thickness. It is offered in 1/4-, 1/2-, 3/4-, 1-, 2-, 3-, 4- and 6-inch widths on 108-foot rolls. Check current variants and application requirements before ordering. Wider strips can reduce the number of seams on larger areas; narrower strips are easier to position around small details.

Copper Foil Tape with Conductive Adhesive

Copper foil with conductive acrylic adhesive. 2.8 mil total thickness, including adhesive. Choose your width on the product page.

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Plan the cavity and pickguard coverage

Before opening the guitar, unplug it from the amplifier and disconnect any battery as directed by the electronics maker. Photograph the existing wiring and protect the finish. Check the available clearance around switches, pots and the output jack before adding foil.

Plan how the cavity lining, separate cavities and pickguard shielding will contact one another. A strip that appears to touch another surface may still have an electrically poor joint. The shield needs a continuous electrical path through the areas intended to work together.

Apply and connect the shielding

1. Prepare the surface. Remove loose debris and contamination using a method compatible with the guitar finish and tape. Let the surface dry. Test any cleaner in an inconspicuous area first.
2. Cut manageable strips. Shape the pieces to suit the cavity floor and walls. Keep foil edges controlled and avoid obstructing screws, moving controls or the fit of the cover.
3. Press the tape down. Smooth the bond area and overlaps, working into corners without leaving loose folds. Check contact between adjacent pieces rather than assuming the adhesive will bridge every joint.
4. Connect to circuit ground. Follow the instrument's wiring plan. A suitable connection may use grounded hardware or a dedicated connection specified for that design. If the process requires soldering, confirm the exact tape's heat compatibility first.

Where a pickguard or cover forms part of the shield, verify its contact with the cavity lining after reassembly. Keep exposed signal terminals clear of the foil: accidental contact can short the signal to ground.

How to check the copper tape with a multimeter

With the guitar disconnected, check continuity between distant pieces of foil, across overlaps, and from the shield to the intended ground point. Include the cover or pickguard when it is part of the design. A check along one uninterrupted strip does not verify every seam.

Investigate open or unstable joints before closing the cavity. A continuity test checks electrical connections; it does not measure a shielding rating in decibels or guarantee a particular noise reduction.

Can copper tape ground a guitar bridge?

Cavity shielding and bridge grounding have different jobs. In many passive guitars, a dedicated bridge or string-ground connection is part of the wiring. Lining a cavity with copper tape does not automatically establish that connection. Follow the pickup manufacturer's diagram and have a guitar technician repair missing or unreliable bridge-ground wiring.

Will shielding stop all guitar hum?

No. Results depend on the instrument and the noise source. Shielding cannot resolve every pickup, cable, amplifier or power-related problem. Compare the guitar in the same setup before and after the work, and check the wiring if output becomes weak or intermittent.

Compare tape sizes for your project

Measure the cavity surfaces and allow for overlaps before selecting a roll width. Review the copper tape specifications and available sizes. For more on electrical paths and seams, read our conductive copper tape guide. For bulk or custom-size enquiries, contact APT with your dimensions and requirements.

Further reading: StewMac's guitar shielding instructions and grounding and shielding guidance.