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Troubleshooting

Why is the surface of my silicone mold tacky?

Off ratio measuring and mixing, not mixing thoroughly, or extremely low humidity level can cause tackiness. If the entire mold or the surface that cured open to the air feels tacky, waiting another day before using may allow it to fully cure and...

Why is my Alumilite Casting resin foaming?

Moisture contamination in urethanes causes foaming. If it foams quite a bit, most likely the moisture is in the resin of the Alumilite. There is not a full proof method of removing moisture from your system. Typically the B side will crystallize...

What do I do if I am still having problems with moldmaking or casting projects and can't find answers in FAQ'S?

The best option is to please call us at 269-488-4000 and speak with one of our technical representatives that will be glad to assist you. Your second option is to browse the site as well as our YouTube channel to review the How To videos as we are...

My paint is not adhering, is it from my mold release?

The use of mold releases in your mold can transfer to your cast piece and can interfere with the paint adhesion. The best thing you can do is to clean the part once demolded using very warm soapy (Dawn or Cascade Gel) and then clean with Rubbing...

What factors contribute to shrinkage in molding & casting parts?

Shrinkage is different by chemistry. Tin curing silicones systems will have some minimal shrinkage ... approximately .25%-.48%. Platinum based silicones will have zero shrinkage. The majority of Alumilite casting resins have some shrinkage but is...

I'm pouring resin parts in an open 1 piece mold and I've run into 2 problems: The resin climbs the sides of the box (capillary action) and the surface of the resin is not flat. Any tips on how to get a completely flat surface on the back?

One trick to get a completely smooth, flat back to an open mold is get a piece of glass or thick clear plastic and mold release it with Pol Ease 2300. You then over pour the cavity until the resin has completely come out of the mold and is laying...

Why am I finding color change in my new Alumilite resin I purchased?

Raw materials we receive can vary in color from batch to batch, Normally this is very slight if any and are normally not noticeable. However all raw materials are quality checked before they are used as well as after the product has been...

Why is my Clear resin white or cloudy?

This white swirl or cloudiness happens when the mix ratio becomes heavy with A side. Keep the mix ratio as close to 1:1 by weight as possible. It needs to be measured out by weight, not volume.

How do I avoid air bubbles in my part?

Cast Alumilite into a warm mold coated with baby powder. This will help the material flow better and cure more evenly. If you are using silicone rubber, stick the mold in an oven set at Warm for approximately 30 minutes or put your mold in a...

My High Strength Silicone does not appear to be curing very quickly and is tacky, what can I do?

Occasionally, too little catalyst or older catalyst will cause silicone to cure more slowly that normal. This type of silicone likes warm moist environments to cure in.To help the silicone cure, take a wet a washcloth or hand towel and place it in...

Why is the surface of my silicone mold tacky?

Off ratio measuring and mixing, not mixing thoroughly, or extremely low humidity level can cause tackiness. If the entire mold or the surface that cured open to the air feels tacky, waiting another day before using may allow it to fully cure and...

It has been 4 hours and my clear resin is still flexible, will it harden?

A post heat cure is strongly recommended for all clear pieces, but less than 1/8" must be post cured. Post curing the clear on the lowest setting on the conventional oven typically 140-160 F. for an hour or two (parts may require some support...