Wood Glue Types Compared: Which One Actually Belongs in Your Shop

Walk into a woodworking store and the glue aisle is overwhelming, yellow bottles, brown bottles, gel formulas, waterproof formulas, epoxy syringes, and specialty adhesives that promise to solve problems you did not know you had. The truth is simpler than the marketing suggests. There are five types of wood glue that matter, and each one has a specific job where it outperforms the others.

PVA (Polyvinyl Acetate): The Everyday Workhorse

Yellow wood glue, Titebond Original, Titebond II, and their equivalents, is PVA glue. It is the default glue for 90% of woodworking joints. PVA bonds wood to wood stronger than the wood itself (a properly glued joint breaks in the wood, not the glue line). It is inexpensive, non-toxic when dry, cleans up with water, and has a working time of about 5-10 minutes before it starts to set.

Titebond II is water-resistant (Type II rating) and handles outdoor furniture that gets occasional rain. Titebond III is waterproof (Type I rating) and handles cutting boards and items that get washed. For interior furniture and cabinets, regular Titebond Original is fine.

Polyurethane Glue: The Gap Filler

Gorilla Glue is the most recognized polyurethane glue. It foams as it cures, expanding into gaps and providing a waterproof bond. Unlike PVA, polyurethane glue can bond dissimilar materials, wood to metal, wood to stone, wood to certain plastics. It is activated by moisture, so you dampen one surface before applying glue to the other.

The downsides are real. Polyurethane glue is messy, the expanding foam squeezes out of joints and is very difficult to remove once cured. It stains skin brown for days. Its bond on clean, tight wood-to-wood joints is actually weaker than PVA. And it is significantly more expensive per ounce.

Epoxy: The Heavy-Duty Problem Solver

Two-part epoxy (resin plus hardener) creates an incredibly strong, waterproof, gap-filling bond. It works on virtually any material and does not require tight joint surfaces. Epoxy is the adhesive of choice for boatbuilding, structural repairs, and filling large voids (mixed with wood flour or other fillers). It cures through a chemical reaction, not evaporation, so it works in sealed joints where PVA would never dry.

Epoxy comes in different cure times, 5-minute, 30-minute, and multi-hour formulas. The slower cure times produce stronger bonds and give you more working time for complex assemblies. Five-minute epoxy is convenient for quick fixes but has lower ultimate strength.

The cost is the main barrier. Quality two-part epoxy is 5-10 times more expensive per ounce than PVA glue. It also requires precise mixing ratios and generates heat during curing (exothermic reaction) that can cause problems in large volumes.

CA Glue (Cyanoacrylate): The Instant Fix

Super glue and its thicker woodworking formulas are CA glue. It bonds almost instantly, works on small areas, and excels at specific tasks: gluing pen blanks to mandrels, tacking small parts in place for further machining, stabilizing punky wood, and repairing small chips and cracks. CA glue with an accelerator spray gives you a workable bond in seconds.

CA glue is brittle and does not handle shock loads or flexing. It is not a structural adhesive. Use it for the specific tasks where instant bonding is valuable, not as a general-purpose wood glue.

Hide Glue: The Traditional Choice

Made from animal collagen, hide glue was the standard woodworking adhesive for centuries before PVA was invented. It is still used in instrument building, antique restoration, and high-end furniture for one critical property: reversibility. Hide glue joints can be disassembled with heat and moisture, allowing repairs and adjustments that permanent adhesives do not permit.

Liquid hide glue (Titebond Liquid Hide Glue) offers the convenience of a squeeze bottle with the reversibility of traditional hide glue. It has a long open time (about 10 minutes) which helps with complex assemblies where you need time to get everything aligned before the glue grabs.

Glue Joint Strength Depends on the Joint

No glue compensates for a bad joint. A sloppy mortise and tenon with the best epoxy is weaker than a tight mortise and tenon with basic PVA. The adhesive is always secondary to the fit. If you find yourself relying on glue to hold a weak joint together, the real fix is to improve the joint, not switch glues.

For selecting the right joint construction for your project, check out our Wood Joint Selector. It recommends joints based on the strength requirements, your tools, and your experience level. And when you need to calculate lumber requirements for a glue-up, the Board Feet Calculator figures out exactly how many board feet you need.

Keep your shop simple. One good PVA bottle and a tube of epoxy handle almost everything you will encounter in the first several years of woodworking.