Wood glue sets in about 30 minutes to an hour under clamp and fully cures in about 24 hours.
Drying times
- Set (clamp time): 30 minutes to 1 hour for Titebond Original.
- Handling: after 1 to 2 hours.
- Full cure: 24 hours (some say up to 48 to 72 hours for the strongest joint).
Factors
Temperature (best 50 to 90 F), humidity, wood porosity and glue thickness.
Tips
- Clamp joints tightly.
- Apply thin, even coats.
- Wipe off squeeze-out.
- Don’t stress the joint for at least 24 hours.
Types
Titebond III is waterproof. Polyurethane glue (Gorilla Glue) expands.
Strength
Properly glued joints are often stronger than the wood.
Drying times
Standard yellow or white PVA wood glue, such as Titebond Original, sets in about 30 minutes to 1 hour under clamps, reaches handling strength in 1 to 2 hours, and cures fully in 24 hours. Titebond II and III have similar clamp times of 30 minutes to 1 hour. Fast set glues like Titebond Quick and Thick set in 10 to 15 minutes. Polyurethane glue needs 1 to 2 hours of clamping and 24 hours to cure. Epoxy depends on type, from 5 minutes to 24 hours.
Factors that change it
- Temperature: PVA glues need at least 47 to 55 F to cure properly, and cure faster in warm rooms.
- Humidity: high humidity slows drying, since PVA dries by water evaporation.
- Thickness of the glue line: thin, even coats dry faster.
- Wood type and moisture content: dense or oily woods such as teak and rosewood bond poorly, and porous wood absorbs glue faster.
- Clamping pressure and open time, which is how long you can work before the glue skins over, about 5 to 10 minutes for most PVA glues.
Tips
- Apply glue to both surfaces for end grain and spread evenly with a brush or roller.
- Clamp with firm pressure, enough that a small bead of glue squeezes out.
- Wipe squeeze-out with a damp cloth, or let it gel and scrape it off, as glue left on wood blocks stain and finish.
- Do not stress the joint for 24 hours.
- Test fit pieces without glue before applying.
- Use enough clamps and keep joints aligned.
Types
- PVA (yellow, white): most common for indoor work. Titebond III is water resistant and suited to outdoor use.
- Polyurethane glue: waterproof, expands as it cures.
- Epoxy: fills gaps, bonds different materials.
- Hide glue: traditional, reversible, long open time.
- Cyanoacrylate (super glue): very fast, for small repairs.
Strength
A well made PVA glue joint on wood is typically stronger than the wood itself, with shear strength around 3,500 to 4,000 psi. Tests show that the wood often breaks before the glue line. Joints are weakest on end grain without reinforcement, so use dowels, biscuits or other joints.
Glue types and cure times
Yellow aliphatic wood glue such as Titebond Original sets in 30 minutes to 1 hour under clamp, and reaches full strength in 24 hours. Titebond II and III are water resistant and waterproof. Polyurethane glue needs moisture to cure and expands as it foams. Hide glue allows longer open time. Optimal conditions are above 50 F (10 C) and clamp pressure of 100 to 250 psi for softwoods and up to 300 psi for hardwoods. Tight joints are stronger than thick glue lines. Wipe squeeze-out with a damp cloth before it dries. A properly glued joint is often stronger than the wood itself.
Based on data from Franklin International (Titebond) technical sheets
