Super Glue Tricks: 4 Ways to Use CA Glue in Woodworking
Every woodworking shop needs a good selection of adhesives. Yellow wood glue handles most everyday joinery, while epoxy is useful for filling gaps and bonding different materials. But there's another adhesive I like to keep close at hand: cyanoacrylate glue, better known as CA glue or super glue.
CA glue is especially useful because it bonds quickly and works with a variety of materials. That makes it ideal for small repairs, decorative details, and situations where conventional clamps would be awkward or impractical.
And its usefulness goes well beyond simply gluing two pieces of wood together.
Here are four practical ways to put CA glue to work in your woodworking shop.
1. Use CA Glue for Decorative Inlays
One of the most useful properties of cyanoacrylate glue is its ability to bond materials other than wood.
This makes it a great choice for decorative inlay work, where you may want to combine wood with materials such as metal, shell, or stone.
For example, CA glue can be used to secure a pewter insert in a wooden box. The adhesive bonds the two materials without requiring a complicated clamping setup.
It's also useful for attaching small decorative accents that would be difficult to hold in place while conventional wood glue dries.
Getting a Reliable Bond
For the best results, make sure both surfaces are clean, dry, and free of dust or oil.
Apply a small amount of CA glue to the mating surfaces and position the inlay carefully. Follow the adhesive manufacturer's instructions for application and curing.
Some CA glues benefit from controlled moisture during curing, while others work best with a compatible activator. If you need to speed up the bond, use an activator recommended for the adhesive rather than adding uncontrolled moisture.
Keep in mind that CA glue works best when the mating surfaces fit closely together. For larger gaps or applications that require more flexibility, another adhesive may be a better choice.
2. Bond Wood and Plastic for Shop-Made Jigs
CA glue is also handy when building jigs and fixtures.
Many woodworking jigs combine hardwood or plywood components with plastic materials such as acrylic or polycarbonate.
These materials don't always bond well with conventional woodworking glue.
A suitable CA adhesive can provide a quick way to attach small plastic parts to wooden components without waiting for a lengthy glue-up.
This is particularly useful for positioning small guides, stops, or other accessories.
Before committing to a finished jig, test the adhesive on scrap material. Some plastics are difficult to bond, and certain CA formulations can cause crazing or cracking in acrylic.
For structural connections or parts that will experience significant force, use mechanical fasteners or another fastening method designed for the load.
3. Apply a CA Glue Finish to Small Turned Projects
Most of the time, we think of glue as something that holds parts together rather than something that protects the surface of a project.
But CA glue can also be used as a finish on small woodturning projects.
When applied in thin coats and allowed to cure, CA glue forms a hard, glossy surface that can be polished to a smooth sheen.
It's especially useful on small items such as knobs, pens, and other turned accessories.
Some oily woods, including bocote, can present challenges for conventional finishes. A compatible CA finish may provide another option, although surface preparation and testing are important.
Tips for a Smooth CA Glue Finish
Start with a clean, smoothly sanded workpiece.
Apply the CA glue in thin, even coats using an applicator and method recommended for woodturning finishes. Allow each coat to cure before applying the next.
After building up the finish, it can be leveled and polished to produce a smooth, glossy surface.
Use a CA glue formulated for finishing whenever possible.
Safety note: CA glue can bond skin instantly and generates heat as it cures, particularly when it contacts cotton or other absorbent materials. Never use ordinary cotton rags or gloves to apply CA glue, and follow the product's safety directions. Use adequate ventilation and suitable eye protection, especially when working at the lathe.
4. Repair Small Wood Defects with CA Glue and Sanding Dust
One of my favorite uses for CA glue is repairing small defects in a workpiece.
A slip with a saw blade, a small chip, or an unwanted groove doesn't always mean the part needs to be replaced.
In many cases, a mixture of CA glue and fine sanding dust can fill the damaged area and make the repair much less noticeable.
For example, while cutting a channel for an inlay, it's possible for a saw blade to wander and leave a scar outside the intended cut.
Rather than starting over, you can fill the damaged area with sanding dust and CA glue.
How to Make a CA Glue and Sawdust Repair
For the best color match, collect fine sanding dust from a scrap piece of the same wood.
Using dust from the actual species is important because the color and texture of the filler can vary considerably between woods.
Mask off any nearby details or surfaces that you want to protect.
Pack a small amount of fine sanding dust into the damaged area, then apply a controlled amount of thin CA glue to bind the particles together. You can also use a compatible CA glue and filler technique recommended by the adhesive manufacturer.
Allow the repair to cure completely.
Then scrape or sand the filled area flush with the surrounding wood.
The repair creates a solid fill that can make small defects much less noticeable.
Keep in mind that CA glue and sanding dust may absorb stain or reflect light differently from the surrounding wood. Test the repair technique on scrap before using it on a highly visible surface.
Choosing the Right CA Glue for Woodworking
CA glue is available in several viscosities, and each has its advantages.
| Type | Best Uses |
|---|---|
| Thin CA glue | Wicking into tight-fitting joints, stabilizing small cracks, and saturating fine filler |
| Medium CA glue | General-purpose bonding, small inlays, and shop-made accessories |
| Thick CA glue | Applications requiring a little more positioning time or minor gap filling |
| CA glue formulated for finishing | Building a smooth, hard surface on small turned projects |
The exact curing time and bonding characteristics depend on the formulation, temperature, humidity, and materials being joined.
Always check the manufacturer's recommendations before using CA glue on an unfamiliar material.
Keep CA Glue Handy in Your Workshop
CA glue may not replace traditional woodworking adhesives, but it can handle plenty of jobs that ordinary wood glue can't.
From attaching metal and shell inlays to building shop-made jigs, finishing small turnings, and repairing minor defects, its quick bonding and versatility make it a valuable addition to your finishing and assembly supplies.
The next time you run into a small repair or an awkward glue-up, CA glue might be just the solution you need.
Choosing and Using Super Glues
Not all super glues are the same. Thin, medium, and thick CA adhesives each have different strengths, and choosing the right one can make a big difference in your woodworking projects.
Learn more about selecting, applying, and working with cyanoacrylate adhesives in our guide to Choosing and Using Super Glues.
LEARN MORE ABOUT CA GLUE → Get Better Results with the Right CA Glue
