About Harboro Rubber Engineering in Rubber      Contents      Introduction      Uses of Rubber      Processing Rubber      Designing With Rubber      Selecting / Specifying Rubber      Quality In Rubber      Rubber Directory      Health & Safety          Material Data          Fire and Explosion Hazard          Health Hazard Data          Company Statement          General Guidelines              Storage              Crystallisation              Low Temperatures              High Temperatures              Burning              Rubber Dust              Servicability              Resistance              Bonded Rubber Parts              Friction              Electrical Properties              Radiation      Measuring Properties      Glossary of Terms      Request A Copy Contact Information

Crystallisation   Some rubbers partially crystallise at room or lower temperatures. This will change their hardness and flexibility. Neoprene in particular crystallises significantly unless special resistant grades are used. Crystallisation can generally be removed by heating to 100°C for 30 minutes.