Epoxies

What is the shelf life of your Rotfix and SculpWood?

Our epoxies have essentially unlimited shelf lives so long as they are unmixed and stored in sealed containers. The resin may crystallize or the hardener may darken but this will not affect its performance. If the material is more than a year old do a test to satisfy yourself that it cures properly.

Can I color SculpWood?

Yes. The preferred method is with System Three paste pigments. You can add these up to 10% by weight of the Part A resin. You can also use universal paint colorants from the paint or hardware store, but only up to 2% by weight of the resin. Mix the colorant into the “A” side, and then mix that into the “B” side. It can also be painted after it has cured although you want to use a 100% acrylic primer like our SuperPrime.

My epoxy resin is taking too long to cure. How can I speed it up?

The only way to speed the cure of our epoxy resin products, once they've been applied, is to heat the room or the area that your project is in. Every 18°F increase in temperature cuts the time it takes for the resin to cure in half.

What can I use as a material that epoxy won't stick to?

Epoxies will not stick to mold-release compounds recommended for use with epoxy, and polyethylene sheeting, like disposable paint tarps and sandwich bags. Epoxy does not stick to the shiny side of packaging tape or paraffin wax. Also newsprint can be used but would need to be sanded off afterwards.

I made a small batch and after a week it has not cured. What happened?

It is difficult to measure a batch of resin and hardener less than three fluid ounces by volume. If you need to make a small batch, measure it by weight. If the small batch has not cured, it was not mixed proportionately.

I made a large batch and found a few areas that are still sticky after most of the surface is cured hard. What happened?

The material was probably not thoroughly mixed and unmixed material was scraped from the container onto the surface. When mixing always be sure to mix from the bottom to the top and scrape the sides of the container and the stick. Experienced users dump and scrape the mixed material from the first container into a second and then mix again. This totally avoids the problem described above.

I made a large batch and found a few areas that are still sticky after most of the surface is cured hard. Can I fix it?

Yes. First, scrape off what you can. Then pour or wipe a suitable solvent on the surface. Wear a respirator or provide proper ventilation when working with solvents. Wipe or scrub the resin surface. This will remove residual uncured resin but won't harm any cured resin. Sand the underlying cured resin and apply a fresh coat properly measured and thoroughly mixed. Note: Over bare wood the fresh coat of resin will need to be worked into the wood with a stiff-bristle brush to mix any residual uncured material into the fresh material. This will ensure that the fresh coat will adhere properly to the wood.

I have material that hasn’t cured after four days in a warm room. Can I apply fresh resin over the top and have the whole thing cure hard?

No. If the older material has stopped curing, applying more epoxy won't start it up again. The uncured resin must be removed and new material applied to that surface. It was mixed improperly to begin with.

Can I use the hardener from one of your epoxy systems with the resin from another?

No. Epoxy resin systems are two-part products where each part is designed to go with the other. However, if you want to make the SculpWood thinner and easier to trowel, you can add a few drops of mixed RotFix until you get the consistancey you want. Sometimes, I will use the SculpWood as is to do 99% of the fill, then thin it down a bit for the final layer.

Can I apply mixed epoxy to a piece of wood and then bend it without cracking the epoxy?

Yes, while the cured epoxy may be stiffer than an equal thickness of wood, the epoxy coating is much thinner and can be bent further than the wood it coats without cracking.

My question isn't listed here. What are my options?

If we haven't answered your question earlier, send us an e-mail at technical@Ewoodcare.com or give us a call at 425/827-6000.