Wood Glue Types and Their Uses

Choosing between wood glue types comes down to four questions: does the joint need to survive moisture, how much working time do you need before it grabs, does it have to fill a gap, and does it ever need to come apart again. Answer those and the choice is usually obvious. This guide covers the six glues worth knowing, with the timing numbers that decide which one fits your assembly.

Wood glue types fall into six families: PVA and aliphatic resin for general indoor joinery, epoxy for gap filling and bonding dissimilar materials, polyurethane for damp conditions and uneven surfaces, cyanoacrylate for fast small repairs, and hide glue where the joint may need to be reversed. Most woodworking uses aliphatic resin.

• Indoor furniture and general joinery: yellow aliphatic resin. It is the default for a reason.
• Occasional damp, like a cutting board: Titebond II class glue.
• Fully outdoors or wet: Titebond III class, polyurethane, or epoxy.
• Gaps to fill or wood bonded to metal or stone: epoxy. It is the only real gap filler.
• Fast small repairs: CA glue. Brittle, so never in a load-bearing joint.
• Antiques and instruments: hide glue, because the joint can be taken apart later.
• A well-made glue joint in solid wood is typically stronger than the wood beside it.

Which Wood Glue Should You Use

In short: yellow aliphatic resin covers most indoor woodworking. The other five solve specific problems.

The honest summary: if you are building indoor furniture, buy one bottle of yellow glue and stop thinking about it. The other five are answers to problems you have not had yet.

How Wood Glue Actually Bonds

First and foremost, we must understand what happens when glue bonds with wood. The bonding process involves two core actions: adhesion and cohesion. Adhesion is the attraction between the glue and the wood. This action is maximised when the glue penetrates the wood's pores, leading to a stronger bond. Conversely, cohesion refers to the attraction within the adhesive material itself.

These properties are amplified by applying pressure during the curing process, such as through clamping. This disperses the glue into the wood's nooks and crannies, making for a more sturdy connection. Time, temperature, and humidity are all factors that influence the curing process and thus, the strength of the adhesive bond. The standard test behind every 'stronger than the wood' claim is ASTM D905, which loads a glued block in shear and reports how much of the failure ran through wood rather than glue.

It's crucial to select the right glue for your project, based on inherent material qualities and the specific needs of your project. For example, some adhesives are better at resisting water, while others excel at bonding porous and non-porous surfaces. The key here is to research each option before making a decision. The next section walks through each one.

The Six Wood Glues, Compared

While there are countless adhesives available on the market, certain types have gained popularity due to their performance and versatility in woodworking. The following are some of the most common types of wood glues you might encounter:

• PVA (Polyvinyl Acetate): Commonly known as white glue or carpenter's glue, PVA is inexpensive, non-toxic, and easy to use. Great for general woodworking projects but not water-resistant.
• Yellow Wood Glue: A popular type of PVA glue, yellow wood glue is ideal for interior woodwork and is a staple in many woodshops. It provides a stronger bond than white glue.
• Hide Glue: Traditionally made from animal hides, this type of glue is famous for its strength and long open working time. It's often used in high-end woodworking projects.
• Epoxy: A two-part adhesive that's waterproof and can bond either porous or non-porous materials together. It's more complicated to mix and use, but it provides an exceptionally strong bond.

This summary serves as a quick-reference guide, but each adhesive type has its strengths and weaknesses. In our guide on common woodworking mistakes, you'll find more details about these profiles, including best practices for use and how to avoid common pitfalls.

Hide Glue

The oldest adhesive in the trade and the only one on this list that is deliberately reversible. A hide glue joint can be released with heat and moisture, which is why furniture conservators and instrument makers still use it. A repaired violin has to be openable again in fifty years; a polyurethane joint never will be.

Comes two ways. Hot hide glue is granules melted in a heated glue pot, applied warm, with a short open time and a fast initial tack that makes rub joints possible without clamps. Liquid hide glue comes premixed in a bottle with a much longer open time, which makes it the practical choice for a complicated glue-up you cannot rush.

Weak against moisture, so nothing outdoors. It also has one property no synthetic matches: fresh hide glue sticks to old hide glue, so a repair does not require stripping the original joint back to bare wood.

Note on creep. PVA and aliphatic resins can slowly deform under sustained load, called creep. Rarely a problem in furniture. It matters in bent laminations and thin veneer work, where epoxy, urea formaldehyde or hide glue hold their shape better.

For the joints these glues go into, see woodworking joint techniques, the benefits of using dowels in wood joinery, and the pocket hole screw length chart when the joint is drawn together with screws rather than clamps.

Wood Glue vs Epoxy: Which One for This Joint?

In short: if the joint is tight, clean, wood-to-wood and staying indoors, yellow glue wins on cost, cleanup and speed. Epoxy earns its price when the fit is bad, when only one of the two materials is wood, or when the surface is oily.

This is the choice most people are making at the bench, and the table above answers it a column at a time. Here it is head to head.

Gap filling is the real dividing line

PVA is a film adhesive. It bonds two surfaces that are already touching, and a gap it is asked to bridge stays weak no matter how much you pump in. The cured film has almost no strength standing on its own, so a sloppy joint filled with yellow glue is a joint held together by the few square inches that happened to make contact.

Epoxy cures to a solid mass with structural strength of its own, which is why it is the one family on this page listed as a genuine gap filler. Thickened with a filler it will bridge a real void and still take load. That single property is the reason boatbuilders and repair work reach for it, and it is worth more than every other difference in the table combined.

The honest caveat: gap filling is a rescue, not a method. A joint that fits does not need it, and no adhesive turns a bad fit into a good joint. It stops the bad fit from being the failure point, which is not the same claim.

Dissimilar and non-porous materials

PVA works by soaking into wood fiber and locking there once the water leaves, so it needs porosity on both sides. Metal, glass, stone and most plastics give it nothing to grip and the joint peels off in one piece. Epoxy bonds to the surface itself rather than into it, which is what puts wood-to-metal hardware, stone inlay and repairs to a wooden part with a metal fitting firmly in the epoxy column. If either half of your joint is not wood, the decision is already made.

End grain and oily species

End grain drinks adhesive like a straw, which starves the glue line. The fix with PVA is to size the surface with thinned glue, let it tack, then apply the real coat. That is an extra step and an extra wait. Epoxy does not get pulled away the same way, so end grain takes it without sizing. Neither one makes an end grain butt joint strong, though. That geometry is weak because of the wood, not because of the glue, which is the whole reason joinery exists.

Oily tropical species are the same story. Teak and rosewood carry natural oils that block adhesion, and an acetone wipe immediately before glue-up is mandatory for PVA. Epoxy is more forgiving of what is left behind, which is why it shows up in boat work where teak is everywhere. Wipe the surface anyway.

Open time and temperature

PVA's open time is a property of the bottle you bought: roughly 4 to 10 minutes for standard yellow glue, 10 to 15 for an extended open formula, and no way to change it once you are holding the bottle. Epoxy's open time is something you buy. WEST SYSTEM's 205 Fast hardener gives a 9 to 12 minute pot life at 72°F and its 206 Slow gives 20 to 25 minutes, from the same resin. For a complicated assembly that is the difference between finishing the glue-up and abandoning it.

Pot life is not open time. Epoxy generates its own heat as it cures, so a deep cup of mixed epoxy kicks far faster than the number on the label, while the same mix spread thin on a joint lasts much longer. Pour it into a shallow tray or spread it immediately and you get the working time you were promised.

Temperature runs the other way from what most people assume. PVA has a hard floor: below its minimum application temperature it does not coalesce and the bond is permanently compromised even after it looks dry, which is what ruins glue-ups in unheated winter garages. Epoxy has no cliff like that. The 205 hardener is rated to work down to 40°F. It cures slower as the shop gets colder, and you either wait or switch to a faster hardener. In a cold shop, epoxy is the more reliable of the two.

Cost per joint, and when the extra cost is not worth it

At US retail in September 2026, a 16-ounce bottle of Titebond III runs about $8, which is roughly 50 cents a fluid ounce. A 0.85-ounce two-part epoxy syringe runs about $6, or a little over $7 a fluid ounce, around fourteen times the price. Buying epoxy in bulk closes most of that gap: a quart of WEST SYSTEM 105 resin with its share of hardener works out near $2 a mixed fluid ounce, about four times the cost of yellow glue.

Per joint, that arithmetic is more lopsided than it sounds. One bottle of yellow glue will see a whole dresser through with most of the bottle left, while a syringe of epoxy does one repair and goes in the trash. Bulk epoxy fixes the price and introduces a different cost: mixed epoxy has a pot life, so whatever you mix and do not use is wasted, and mixing small enough batches accurately is its own skill.

When it is not worth it: edge-gluing a panel, assembling a face frame, a mortise and tenon that fits, a chair rail, almost any indoor furniture joint cut properly. A well-made PVA joint in solid wood already fails in the wood rather than the glue line, so epoxy buys no strength there at all. It costs more, mixes slower, and leaves squeeze-out that will not sand flush or take stain like the wood around it. The clean rule is that epoxy is for the problems yellow glue cannot solve: gaps, dissimilar materials, oily surfaces and sustained water. If your joint has none of those, the cheaper glue is also the better one.

Open Time, Clamp Time and Cure Time

In short: open time is how long you have to assemble, clamp time is when clamps come off, cure time is when the joint is at full strength.

Three different numbers that beginners collapse into “drying time”, which is how joints get stressed before they are ready.

• Open time (or assembly time): from spreading glue to the point where it has skinned over and will no longer bond properly. Your working window.
• Clamp time: how long clamps stay on. The joint holds itself after this, but it is not at full strength.
• Cure time: when the bond reaches full strength. Usually 24 hours, and the number to respect before stressing a joint or running the piece through a planer.

These are typical ranges, not specifications. Every one varies with temperature, humidity, wood species and how much glue you spread. Cold shops lengthen everything, and most PVA glues have a minimum application temperature below which the bond is compromised. Check the technical data sheet for the specific product; manufacturers publish these free.

The practical consequence: count your open time before you spread glue, not after. A dry run with clamps and no glue tells you whether a complex assembly fits inside four minutes. If it does not, switch to an extended open time glue or liquid hide glue rather than working faster.

Glue for Outdoor and Wet Projects

In short: check the ANSI water resistance type. Type I is waterproof, Type II is water resistant.

PVA-family glues are graded for water resistance under ANSI/HPVA standards, and the grade is on the bottle:

In the Titebond range this maps to Original (interior), II (Type II) and III (Type I), which is what the numbering on the shelf actually means.

Waterproof glue does not make a waterproof project. The glue line survives; the wood still absorbs water, still moves seasonally, and still rots if it is a species with no natural durability. Species choice and finish matter as much as adhesive choice for anything living outdoors. See types of wood and choosing the right finish.

For genuinely submerged or structural marine work, epoxy is the standard, because it seals the wood as well as bonding it. Our guide to wooden boat building shows where marine epoxy sits among the copper rivets and silicon-bronze screws used through the rest of a hull.

How to Apply Wood Glue Properly

Applying glue effectively matters as much as selecting the right one. This involves ensuring the wood surface is clean, applying the right amount of adhesive, and following proper clamping techniques. In our hand tools vs power tools guide, we delve into some of the essential tools you'll need for this process.

One practical tip, especially relevant for beginners spooked by short open times, is to do a dry run first, fitting your pieces together without glue, to ensure everything lines up perfectly. If it does, you can proceed with confidence when the time comes to apply the adhesive.

No matter the complexity of your project, using wood glue correctly can drastically influence the longevity and aesthetic of your creation. Therefore, it’s worth investing your time to learn about and understand this vital component of woodworking.

Why Glue Joints Fail

In short: almost always starved joints, dirty or oily surfaces, poor mating, or clamps off too early.

Starved joint. Too much clamping pressure squeezes nearly all the glue out. A glue line should be thin, not absent. Snug the clamps until you get an even bead of squeeze-out and stop.

Not enough glue. Both mating surfaces need coverage on end grain and in mortises. Glue applied to one face only, then closed after the open time has passed, gives you a joint held by habit.

End grain sucks glue away. End grain absorbs adhesive like a straw and starves the joint. Size it first with a thin coat of diluted glue, let it tack, then apply the real coat. This is why end grain butt joints are weak and why joinery exists.

Oily or dusty surfaces. Some tropical species, teak and rosewood particularly, carry natural oils that block adhesion. Wipe with acetone immediately before gluing. Sanding dust left on the surface is the more common version of the same problem.

Surfaces that do not mate. Glue is not a gap filler, except epoxy. Two surfaces that do not touch cleanly will not bond no matter what is between them. Fix the fit, do not add more glue.

Clamps off too early. Clamp time is not cure time. The joint will hold itself after the clamps come off and still fail under load hours later.

Cold. Below the minimum application temperature, PVA does not coalesce properly and the bond is permanently compromised even after it looks dry. Unheated winter garages cause this.

Glue that has been frozen or is old. PVA that has frozen and thawed may be stringy or lumpy. Discard it.

And one that is not a failure but looks like one: blotchy finish around a joint. Dried squeeze-out seals the wood and blocks stain. Remove squeeze-out while it is rubbery, roughly 20 to 30 minutes in, with a chisel or a card scraper. Wiping it wet spreads a thin invisible film that shows up the moment you apply finish, which is worse than leaving it.

More on getting joints right in how to achieve perfect joints.

Using Wood Glues Safely

While there isn't anything inherently dangerous about wood glues, inhaling their fumes can be harmful over long periods, and skin or eye contact is best avoided. Therefore, proper PPE, such as safety glasses, gloves, and a facemask, is advised when using certain types of adhesives. Check out our comprehensive guide on shop safety for more details.

Bear in mind that certain types of adhesives, such as epoxies or cyanoacrylates, can cause a stronger reaction than others, so please always read the manufacturer's safety information before use. Polyurethane glues deserve the most care of the six: they cure through MDI, an isocyanate, which OSHA covers in its guidance on isocyanates.

Choosing a Glue: Features to Consider

Here's a quick checklist of features to consider when choosing a wood glue:

1. Bond strength: Will this glue hold your project together under normal use?
2. Open time: Do you have enough time to assemble your project after applying the glue?
3. Drying time: How long will you need to clamp your project?
4. Water resistance: Will this glue stand up to your project's moisture exposure?

Wood glue selection may seem inconsequential, but any seasoned woodworker will tell you it can make or break your project. By understanding how adhesives work and how to choose and apply them properly, you’re well on your way to exploring the joy and fulfillment of crafting with wood.

Key Wood Glue Terms

Adhesion

The bond between glue and wood surface.

Cohesion

The internal strength of the glue itself once cured.

Open time

The working window from spreading glue to when it stops bonding well.

Clamp time

How long clamps stay on before the joint holds itself.

Cure time

When the joint reaches full strength, typically 24 hours.

Squeeze-out

Glue pushed from the joint under clamping pressure.

Starved joint

A joint with too little glue left after excess clamping pressure.

Sizing

Pre-coating absorbent end grain with thin glue so the real coat is not absorbed.

Glue line

The visible layer of cured adhesive in a joint.

Creep

Slow deformation of a glue line under sustained load.

Gap filling

An adhesive's ability to bond surfaces that do not touch cleanly.

Type I / Type II

ANSI water resistance grades. Type I waterproof, Type II water resistant.

Reversible

Able to be released later, as with hide glue.

Tack

Initial grab before full cure.

New to the vocabulary generally? The woodworking glossary covers the rest.

Wood Glue FAQ

What is the strongest wood glue?

For bonding wood to wood, a properly made PVA or aliphatic resin joint typically fails in the wood rather than the glue line, so the glue is not the limiting factor. Epoxy is stronger where gaps, dissimilar materials or sustained moisture are involved.

Is wood glue stronger than the wood itself?

In a well-fitted long-grain joint, generally yes. Break a good glue-up and the fracture usually runs through the wood fibers beside the joint rather than along the glue line. This is a long-standing finding in wood adhesion research; see the USDA Forest Products Laboratory's chapter on wood adhesives.

How long does wood glue take to dry?

Clamps typically come off after 30 minutes to an hour for PVA. Full cure is normally 24 hours. Do not machine or stress the joint before then.

Can I use wood glue outdoors?

Only if it is rated for it. Look for ANSI Type I waterproof or Type II water resistant, or use polyurethane or epoxy. Interior PVA outdoors will fail.

Does wood glue expire?

Yes. Most PVA glues carry a shelf life of a year or two and degrade faster in heat or after freezing. Stringy, lumpy or separated glue should be thrown out. Write the purchase date on the bottle.

Why is my glue joint showing through the finish?

Dried squeeze-out sealed the wood and blocked the stain. Remove squeeze-out when it is rubbery, about 20 to 30 minutes after clamping, rather than wiping it wet.

Can I glue end grain?

You can, but it is weak because end grain absorbs adhesive. Size it with thinned glue first, and for anything structural use joinery that presents long grain to long grain instead.

Do I need to sand before gluing?

A clean, flat, freshly machined surface is what you want. Heavy sanding is not required and the finest grits can burnish the surface. Remove dust before applying glue.

How much clamping pressure do I need?

Enough for an even, continuous bead of squeeze-out along the joint, no more. More pressure past that point starves the joint rather than strengthening it.

Can I glue oily woods like teak?

Yes, with preparation. Wipe the mating surfaces with acetone immediately before gluing to remove surface oils, or use epoxy, which tolerates them better.