This phenolic resin is thermally sensitive and the extruded intermediate is frangible. Particle size of the dryer feed ranges from 1/4" to 3/8". Moisture content is about 15%, dried product is specified at about 3% moisture. Drying must be carried out at a low temperature to avoid premature curing. Gentle handling is also necessary to prevent dusting. During product development, drying was done in rotary dryers. Particle attrition created a significant amount of dust. The engineers’arranged a test at Wyssmont's test facility. The trial showed that the product could be dried at a low temperature with good final moisture control.

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