StrataGrid® is a PET grid designed for walls slopes and embankments, DuraGrid is a PP grid designed for pavements and foundations. They are therefore designed for very distinct and different purposed and in most applications they cannot be switched or substituted.
StrataGrid® is made from Polyester which has a good resistance to UV light. In addition it is coated to further protect from environmental effects. However all polymeric products which are required to provide 100 year design life should be protected from prolonged exposure to sunlight.