Storage
Marpax, in common with all other PVC sheet materials, is best stored indoors, away from direct sunlight, in a cool dry store. The temperature of uncovered stacked sheets in direct sunlight can rise to levels which will be detrimental to the material: the presence of moisture between sheets can add to damage.
Sheets, whether stored indoors or outdoors, should be laid horizontally on a flat clean surface, for example, a solid topped pallet or wooden sheet raised from the floor or ground. Under the total weight of sheet loaded on to it, this support must not distort, or distortion of the sheet could occur during longer storage periods.

Standing sheets on ends or sides, even for short periods, should be avoided. Coloured sheets should be stored in their protective cardboard sleeves.
Do not store indoors close to heat sources, for example, radiant heaters or boilers.
Where storage outdoors cannot be avoided, at all times the stack of sheets should be completely enclosed within a reflective waterproof cover, placed over wooden battens on top of the stack to avoid contact with the sheet surface.

The cover should be secured to protect the stack against sun, wind and rain and the stack should be ventilated to avoid heat build-up.