Some systems can have a condition called "Chemical Freezing" even at temperatures above water freezing (32°F or 0°C).  On the "A" sides of some systems you may look into a fresh bucket of material and think that something is wrong because it looks "grainy" and thick (almost like apple sauce).  On some "B" sides of materials, you may see layered separations from top to bottom. With our Water Clear materials, you may notice that it looks cloudy or has marbled striations. 

If your material is shipped by air, the contents can experience cold temperatures in the belly of an airplane.  In winter time, shipping warehouses and delivery trucks are rarely heated.  So while your material is made in the moderate climate of Southern California, once it leaves our dock it may travel through some nasty weather to get to your dock. 

Another possibility is that you may have stored the material in an uncontrolled climate until its final usage.  Even storing a container of material directly on a concrete floor can have ill-effects.  The heat transfer from material to the cold concrete can be quite severe. 

If these conditions occur, we recommend that you put the material in a warm area of the shop or, with the cap slightly cracked, into an oven at a modest temperature:  100-120°F (38-49°C) for 1-4 hours.  You will then want to re-blend by shaking or if possible stirring with a metal or plastic spatula.  Wood sticks can contain moisture and contaminate the material so avoid using those.  Some shops will even build small warming boxes to place newly received or production material in them to prevent any cold weather issues.  Let the material return to room temperature before casting.

Do not make parts if your material is in this cold condition.  Use the above techniques or call our Technical Department for more help.