The probable reason for your problem is the ultraviolet (UV) transparency of the plastic and the fact that epoxy bonds are not very UV resistant. Even epoxy coatings are not recommended for outdoor applications because they discolor under UV.
This company recently announced it will launch new copolyester heat seal coating formulations for food packaging applications at this year’s PACK EXPO.
Increasing application areas in the emerging economies such as China, India, and Brazil are expected to be the major cause for the advance in demand of the construction sealants.
May 17, 2018
The global construction industry is reportedly driving the market for construction sealants, according to a new report from BIS Research.