How To Remove Dried Araldite

How do you remove Araldite from a surface?

The short answer: heat it, then scrape it. Araldite is difficult to remove once it has fully cured, because it becomes very solvent resistant and cannot readily be dissolved. Heating it above 70 °C softens it enough to make scraping practical, but it still comes down to mechanical removal in the end.

If the Araldite has not cured — if it is still liquid — you have a much easier job: wipe it off with acetone. Methylated spirits sometimes works too.

So the single most useful thing to know about removing Araldite is that the window to remove it easily is measured in minutes. Araldite Super Strong sets in 5 minutes and reaches initial bond in 30. Deal with spills while you are still working, not afterwards.

Why cured epoxy resists solvents

A two-part epoxy cures by chemical reaction between the resin and the hardener, forming a cross-linked solid. It is not a dried-out film that a solvent can re-dissolve — the chemistry has changed permanently. That is exactly the property you want in a structural adhesive, and exactly the property that makes it a nuisance to remove.

The heat route works because the cured bond softens with temperature. The Araldite Super Strong technical data sheet notes that the bond will soften above 60 °C, but strength is restored when the temperature returns to normal. That tells you two things: heating gives you a working window, and it closes as soon as the part cools, so you have to scrape while it is hot.

Removing uncured Araldite

Work quickly — the mixed glue remains usable for only 2–3 minutes at 20 °C and sets in 5.
Wipe the excess away with acetone on a cloth. Methylated spirits will sometimes do the job.
Test the solvent on an inconspicuous spot first if the surface is painted, plastic or finished. Acetone strips many finishes.
Change to a clean part of the cloth often, or you just move the adhesive around.

Removing cured Araldite

Assess the surface first. If it is something that heat will damage — plastic, veneer, a painted finish, anything with a lacquer on it — heating is not an option and you are left with careful mechanical removal alone.
Apply heat to bring the adhesive above 70 °C. Work on the adhesive, not the surrounding surface, and keep the heat moving.
While it is hot and softened, scrape it away. A blade or scraper suited to the substrate, used at a low angle, takes off more and gouges less than a chisel held upright.
Repeat in stages. Several passes of heat-and-scrape remove more than one long attempt, and reduce the risk of damaging what is underneath.
Finish with abrasion where the surface will tolerate it.

Do not expect a solvent to do this work for you. Cured Araldite is very solvent resistant and cannot readily be dissolved — soaking it simply wastes time and puts solvent on a surface that may not like it.

Safety and surface cautions

Acetone is flammable and its vapour is not something to breathe. Ventilate the area and keep it away from ignition sources.
Do not use solvents near the eyes or on broken skin.
Heat guns damage more surfaces than people expect. Test on an inconspicuous area and keep the heat moving.
Scraping cured epoxy generates dust and sharp fragments — wear eye protection.

How to avoid the problem next time

The Araldite technical data sheet's own directions are the best prevention. Dispense equal parts of both liquids onto a clean disposable surface and mix them there — not on the workpiece, and not in the plastic blister. Mask around the joint before you apply the adhesive. Apply the mixed glue to both surfaces and bring them together, so squeeze-out is controlled rather than random. And clean up while it is wet, with acetone.

Replacing the cap from the plunger onto the nozzle for storage, and keeping the pack in a cool dry place, also stops the syringe becoming its own removal job.

Common questions about removing dried Araldite

Will acetone dissolve cured Araldite?

No. Once fully cured it becomes very solvent resistant and cannot readily be dissolved. Acetone is for uncured product only.

What temperature do I need?

Above 70 °C to soften it enough to scrape. The technical data sheet notes the bond starts to soften above 60 °C, with strength restored once it cools again.

Will heating it permanently weaken the rest of the bond?

No — the TDS states strength is restored when the temperature returns to normal. That is why you must scrape while the adhesive is still hot.

Can I get it off glass or ceramic?

Those surfaces tolerate both heat and a blade better than most, so mechanical removal is usually practical. Work at a shallow angle to avoid chipping glaze.

What about Araldite on skin or clothing?

Refer to the safety data sheet for the product, available through the Selleys website. Do not use solvents near the eyes or on open wounds.

Is Liquid Nails any easier to remove?

No — for much the same reasons. See how to remove dried Liquid Nails and how to remove Liquid Nails.

What about super glue?

Also very difficult once cured — see removing Quick Fix Supa Glue.

Which Araldite gives me more time to work cleanly?

Araldite Extra Time 60 Minutes Epoxy gives a much longer working window than the 5 minute version, which makes it far easier to place accurately and clean up as you go.