Improper Mix Ratio
Slow, non-curing or soft material can result if two part materials are not weighed or measured accurately. We recommend weighing, in all cases, on accurate scales (See the *****Accessory Section). Do calculations carefully and double check the mix ratio as recommended on labels and product literature.
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Release Agent or Sealer
Incorrectly applied or missing, or use of the wrong sealer or release can result is sticking or damage to the mold/casting, see Methods. We urge that you make test cures on all surfaces with all materials you are not sure of. Too much release agent can cause pinhole surface defects or bubbles.
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Low Temperatures or Demolding Too Soon
Deformed parts can result. Changing temperatures during curing can cause bubbles and dimensional changes.
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Leaking Mold, Boxes or Shells
Your pour can spill, wasting material and time. Mechanical fasteners and hold downs are advisable and seams must be tight and well-sealed.
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Material Hardens Before It Is In Place
Avoid delays once material is mixed. Watch a clock!
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Unmixed Material
Streaks of unmixed, soft material or gas bubbles that develop several weeks after curing can result from unmixed Part A and B in a mold or casting. Such material is often from the sides and bottom of the mixing container.
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Incorrect Material Selected
Choosing the wrong material can result in sticking or damage such as staining or softening a model, mold or casting.
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Material Not Stirred Before Weighing
Some individual components must be mixed before use. Unmixed material can result in soft cures or bubbles.
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Contaminated Material
Moisture or other foreign contaminants can spoil the cure of materials. Freshly opened containers and clean tools and containers are important.
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