IDEAL STORAGE CONDITIONS

• A dry atmosphere. Some materials (particularly cellulose based) are hygroscopic and consequently are dimensionally unstable in damp conditions.
  
  
• 20°C or below. The rate of oxidation is directly related to the ambient temperature and above 20°C some materials will harden over a period of time. Lower temperatures (e.g. frosts) will not normally harm gaskets. Avoid localised heat such as steam pipes or radiators.
  
  
• In the dark. Ultra-violet light in the sun’s rays can attack some gasket materials and cause cracking and embrittlement.
  
  
• Away from any electrical discharge. Some electrical equipment (e.g. arc-welding) can create ozone gas which has a serious effect on many polymers.
  
  
• Flat. The gasket will give its best performance if stored flat instead of rolled, folded or hung on hooks.
  
  
• Avoid oil contamination (particularly important for graphite gaskets)

SHELF LIFE
Storage life can be as short as a few weeks or as long as five years-depending on the gasket material and the storage conditions. We recommend that if the environment as detailed above is employed then gaskets should be examined every year to check their condition.