How do I re-glue a wobbly chair?

Evidence grade: B1 — Trade practice Effort: Intermediate · half day–weekend · rubber mallet, clamps, wood glue or epoxy, syringe

Short answer: the right repair is taking the chair apart, removing all old glue, and regluing with clamps. Epoxy injection through drilled holes is only the fallback for joints you can't reasonably disassemble — it works, but it's permanent and can't be redone. Pick the method by how the chair comes apart, not by which looks easier [1][2].

The proper method: disassemble, clean, reglue

1. Work the chair apart. Mark every joint with tape so parts go back in the same places. A rubber mallet on the tenons — never on the slats — loosens joints; heat from a hair dryer can help stubborn ones [1].
2. Remove ALL old glue. This is the step people skip and the reason reglued chairs fail again. Modern white/yellow glue and most other adhesives can't be softened with water — pick and scrape the old glue out of every mortise and off every tenon (a chisel or awl; don't enlarge the holes). Hot water softens hide glue if the chair is that old [1].
3. Dry-fit and clamp squarely. Check every joint is snug; a shim or veneer sliver can tighten a loose tenon. Yellow wood glue works for tight joints — slow-set epoxy suits worn, gappy ones [1][2].
4. Glue, clamp, cure. Apply glue to both surfaces, press the joint together, clamp squarely, and wipe squeeze-out with a rag. Let it cure fully — overnight for wood glue, per the label for epoxy [1][2].

The fallback: epoxy injection (when disassembly isn't practical)

1. Drill 1/8-in. holes in inconspicuous spots, angled so the bit ends in the cavity behind each dowel — probe with the bit to feel the hollow space [2].
2. Inject thin, slow-setting epoxy (boat-repair epoxy has the right consistency; never 5-minute epoxy) until it runs out of the joint. A syringe made for gluing is ideal [2].
3. Push the joint together, hold it square while the epoxy sets, and wipe the excess with a rag [2].
4. Alternative: thin standard wood glue slightly (no more than 5% by weight of water) so it flows into the drilled holes — same technique, more reversible [2].

Why epoxy injection is the fallback

• Epoxy won't bond well to old glue — in the full method you remove it; in injection you can't, so the bond is weaker by design [2].
• It's irreversible. Once cured, that joint will never come apart again. On a chair with widespread looseness, you may lock in a crooked repair that should have been rebuilt [1][2].
• On valuable or antique furniture, use hide glue (reversible) and hand the job to a restorer — epoxy is exactly what restorers don't want to find [1].

⚠️ Stop rules

• Cracked or split legs, broken tenons, missing spindles, or a failing seat rail — that's repair/replacement of parts, not regluing; a restorer earns this one.
• Widespread looseness across the whole frame — injection won't save it; full disassembly or a professional rebuild is needed.
• Antique, heirloom, or historically significant pieces — don't drill or epoxy them; use reversible methods under a restorer's guidance.
• If you can't clamp the joint squarely, the chair will be wobbly in a new direction. Don't glue it crooked.
• Do not sit on the chair until the adhesive has fully cured per the product's instructions — load before cure is how the joint fails again.
• PPE/ventilation: nitrile gloves and eye protection when mixing and injecting epoxy (it's a skin sensitizer); ventilate the room per the epoxy label. Drilling needs eye protection and dust control.

Honest limits

• Injection is a holding repair, not a restoration — it can't fix wood that's crushed, split, or rotten.
• Thin injected glue adds almost no structural material; a joint that is mechanically worn (oversized dowel holes) is held by adhesive grip, not by wood bearing on wood.
• If old finish must be preserved around the joint, hide the drill holes in shadow lines — or accept that the injection method isn't for showpieces.

Sources

1. Family Handyman — "New life for wobbly chairs." https://www.thefreelibrary.com/New+life+for+wobbly+chairs-a054757017 — mark and disassemble joints (rubber mallet on tenons); remove ALL old glue — modern white/yellow glue and most other adhesives can't be softened with water, scrape/pick rather than enlarge holes; hot water softens hide glue; use slow-set epoxy (at least an hour of working time) for worn/loose joints; use hide glue on valuable antiques for reversibility; injection can't be undone.
2. Family Handyman — "Fast Furniture Fixes" (Inject Epoxy into Loose Joints). https://www.familyhandyman.com/list/fast-furniture-fixes/ — drill 1/8-in. holes angled to end in the cavity behind each dowel; inject thin epoxy (boat-repair consistency, not 5-minute) until it runs out of the joint; push together, wipe excess with a rag; epoxy won't stick well to old glue; thinned standard wood glue (≤5% water by weight) is the reversible alternative.

No product link — injection calls for thin, slow-setting epoxy delivered by syringe; a 50 ml metal-repair cartridge is the wrong form factor for this job.

Repair Lab · Release 1 · Evidence last checked September 30, 2026 · A project of AOJEL