Instructables

Low-temp resin/RTV curing oven

This will show you how to make a simple low-temp resin/RTV curing oven from a spare ice chest and lamp with a flexing arm so that you can cure your resins under ideal conditions no matter how bad the weather is.

You will need:
1 Large Ice Chest.
1 Lamp with a flexing arm.
Small amount of strong adhesive (I used some spare epoxy)
Magic Sculpt self-hardening epoxy clay or other filler material.

*A Dremel is HIGHLY recommended!*
 
Remove these adsRemove these ads by Signing Up

Step 1: Remove the drain plug

The first step is to remove the drain plug. You won't need this when you're not storing liquids in here, and it makes a convenient place to run your power wire.

I've checked on a few different coolers and they all seem to just unscrew, doing this can be as easy as jamming an oversize flat head screw driver in and twisting.

Step 2: Route the wires

Picture of Route the wires
The easiest way to do this is to simply use a Dremel with a sanding attachment to widen the drain just enough for the plug to fit through.

If you don't have a dremel, you'll either need to do this the slow way... or if you have a soldering iron you can try desoldering the wires from the lamp, running them through the drain, and reattaching.

Step 3: Prepare the base

the Polyethylene used inside coolers doesn't exactly make for a good surface to adhere to, in fact few adhesives probably even can.

Determine where you want the base located inside the oven and make a mark around the base.

Take your Dremel or sand paper and scar the PE liner, and do the same on the bottom of the lamp base. Don't be afraid to get aggressive, the uglier it is the better the surface is for your epoxy.

Step 4: Mount lamp heater

Turn ice chest on its side/back/top/etc. so that the lamp freely sits on the spot you have chosen without falling.

Prepare your epoxy or other adhesive.

Apply adhesive to both surfaces.

Place lamp and let the adhesive set.
Narlo112 years ago
could post cure it in one of these as well. good idea. Although a thermostat heater inside a insulated box works as well. I use it in a 4X4 ft box though.
JolieK4 years ago
Great idea. Thanks!
I work in a fiberglass repair shop (Aviation) and when I need to accelerate a resin cure for a small part I use a blow dryer set on low and a cardboard box. Cut a small hole to put the nozzle of the blow dryer into in one of the sides, usually at the bottom, place the part inside on a stand of some sort ( I use a paper cup we mix resin in, but a small block of wood will work too) and cut a flap on the side near the top to avoid excessive heat build up. This works very well for room temperature curing resins and resins that take 12 hours or so to cure. Speeds it up to 2 to 3 hours on low setting.
Thanks for this tip! I will make one and put it to good use. Do you work with silicones?
idmain (author)  stringstretcher4 years ago
I've used it with silicone and polyurethane more times than I can count. Worked wonders in a cool climate.
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!