Open time, clamp time, and full cure time for every common woodworking adhesive — PVA, polyurethane, hide glue, CA, and epoxy.
Rushing a glue joint is one of the most common woodworking mistakes. This chart separates the three numbers that matter: open time (how long you have to assemble), clamp time (how long it must stay clamped), and full cure time (when the joint reaches full strength). Clamp times below are manufacturer minimums for unstressed joints; always wait the full cure time before machining or stressing the joint.
Standard PVA wood glue (Titebond Original) has about 4–6 minutes of open time, a 30-minute to 1-hour minimum clamp time, and reaches full strength in 24 hours. Polyurethane glue (Gorilla Glue) clamps for 1–2 hours and cures in 24 hours. 5-minute epoxy can be unclamped in ~15 minutes but cures fully in 24–72 hours. Hide glue sets quickly but cures in 24–48 hours. Cold or dry air slows every one of these down — see the full chart below.
Values are for typical shop conditions: about 70°F (21°C) and 50% relative humidity. Times increase in cold or dry environments. Clamp time is the manufacturer minimum for normal, unstressed joints.
| Glue Type | Open / Assembly Time | Minimum Clamp Time | Full Cure Time | Best Uses |
|---|---|---|---|---|
| PVA – Titebond Original | 4–6 min | 30 min–1 hr | 24 hr | General interior woodworking |
| PVA – Titebond II (water-resistant) | 4–6 min | 30 min–1 hr | 24 hr | Outdoor, exterior trim (Type II) |
| PVA – Titebond III (waterproof) | 8–10 min | 30 min–1 hr | 24 hr | Outdoor, cutting boards (Type I) |
| PVA – Titebond Extend (long open) | 15 min | 30 min–1 hr | 24 hr | Complex, multi-part glue-ups |
| Polyurethane (Gorilla Glue) | 10–20 min | 1–2 hr | 24 hr | Dissimilar materials, gap filling |
| Liquid Hide Glue (Titebond) | 10–15 min | ~24 hr | 24–48 hr | Antiques, instruments, repairable joints |
| Hot Hide Glue (192 gram) | 30–60 sec | 30 min–1 hr | 24–48 hr | Veneering, hammer veneer, restoration |
| CA Glue – Thin (instant) | 5–15 sec | 10–30 sec (hold) | 24 hr | Small parts, turning, finish repairs |
| CA Glue – Medium/Thick | 15–60 sec | 30–60 sec (hold) | 24 hr | Gap filling, knots, jigs |
| 5-Minute Epoxy | 3–5 min | ~15 min | 24–72 hr | Quick repairs, metal-to-wood |
| Slow-Set / Laminating Epoxy | 20–60 min | 4–8 hr | 24–72 hr | Structural, marine, bar tops |
| Plastic Resin / Urea (powdered) | 15–20 min | 6–8 hr | 24 hr | Bent laminations, veneer |
| Construction Adhesive (PL / Liquid Nails) | 10–20 min | 24 hr | 7 days | Subfloor, panels, framing |
| Contact Cement | 15–20 min (flash off) | Instant on contact | 24–72 hr | Laminate, veneer, edge banding |
Clamp time only means the joint can be unclamped without slipping. The joint is not at full strength yet. Always wait the full cure time (usually 24 hours for PVA) before planing, sanding, routing, or stressing the joint.
PVA (polyvinyl acetate) yellow and white glues are the workhorses of the shop. The most important practical difference between products is open time — how long you can fuss with the assembly before the glue skins over.
| Product | Open Time | Water Resistance | Min. Use Temp | Notes |
|---|---|---|---|---|
| Titebond Original | 4–6 min | Interior only | 55°F | Fast tack, sands clean |
| Titebond II Premium | 4–6 min | ANSI Type II | 55°F | Water-resistant, exterior |
| Titebond III Ultimate | 8–10 min | ANSI Type I (waterproof) | 47°F | Food-safe when cured, lowest temp |
| Titebond Extend | 15 min | Interior | 55°F | Longest open time for big glue-ups |
| Elmer's Carpenter's Wood Glue | 5 min | Interior | 55°F | Budget interior PVA |
Open time shrinks fast in warm, dry, or breezy shops. For a complex glue-up with many parts, switch to a long-open-time glue (Titebond Extend or Titebond III) or use slow-set epoxy. A dry assembly run with clamps staged first is the single best way to beat the clock.
Every adhesive on this page is temperature sensitive. PVA glues need a minimum application temperature (the surface, glue, and air must all be above it) or the bond can fail by chalking or freezing. As a rule of thumb, cure time roughly doubles for every 18°F (10°C) drop below 70°F.
| Shop Temperature | PVA Clamp Time (approx.) | PVA Full Cure (approx.) | Notes |
|---|---|---|---|
| 50°F (10°C) | 2–4 hr | 48 hr+ | Near minimum — bond at risk below this |
| 60°F (16°C) | 1–2 hr | 36 hr | Slow but reliable |
| 70°F (21°C) | 30 min–1 hr | 24 hr | Ideal shop conditions |
| 80°F (27°C) | 20–30 min | 18–24 hr | Open time shortens noticeably |
| 90°F+ (32°C+) | 15–20 min | 18 hr | Very short open time; work fast |
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For standard PVA wood glue like Titebond Original, clamp for at least 30 minutes to 1 hour for unstressed joints, but the manufacturer recommends waiting 24 hours before applying stress or machining the joint. In cold or humid conditions, extend the clamp time. Polyurethane glue (Gorilla Glue) needs 1 to 2 hours of clamping, while 5-minute epoxy can be unclamped in about 15 minutes but reaches full strength much later.
Most PVA wood glues reach full strength in 24 hours under normal shop conditions (70°F, 50% humidity). Polyurethane glue cures fully in about 24 hours, epoxy in 24 to 72 hours depending on the formula, and hide glue in 24 to 48 hours. Curing is slower in cold or very dry air. Wait the full cure time before stressing the joint, not just the clamp time.
Open time (also called working or assembly time) is how long you have after spreading glue to position the parts before the glue starts to skin over. Clamp time is how long the joint must stay clamped for the glue to hold without movement. Titebond Original has about 4 to 6 minutes of open time and a 30-minute to 1-hour minimum clamp time, while Titebond Extend offers a longer 15-minute open time for complex glue-ups.
Yes. PVA wood glues require a minimum application temperature of about 55°F (47°F for Titebond III) and dry fastest near 70°F. Below 50°F, PVA glue can fail to form a proper bond from chalking or freeze damage. Cold slows curing dramatically, while warmth and good airflow speed it up. Epoxy and polyurethane are also temperature sensitive, with cold conditions roughly doubling cure times.