The Influence of Moisture in Plastics No external factor is as critical to a plastic before processing as moisture. Depending on the material, it is not necessary to leave it in the rain, on the floor or near a wall that is mocking so that the absorbed moisture content interferes with the process or the quality of the finished product. HDPE sheet for signage solutions. Benefits. GEM Board™ is a durable, consistent sheet which shows an unbelievable resistance to UV and harsh weather conditions.It’s great for applications where weathering and moisture are factors. sheet or as an extruded profile. It may be even be a diecasting or forging. In almost every case, the aluminium alloy will be finished for a variety of reasons. These include a wish to enhance or maintain the original metallic appearance or even to modify it to make it indistinguishable from other metals, alloys or metallized plastics.

HDPE sheet for signage solutions. Benefits. GEM Board™ is a durable, consistent sheet which shows an unbelievable resistance to UV and harsh weather conditions.It’s great for applications where weathering and moisture are factors. GEM Plastics is proud to introduce GEM BoardTM for signage applications. Our high-grade HDPE sheet ranging from .200” to 1.5” thick is a durable, consistent sheet which shows an unbelievable resistance to UV and harsh weather conditions. It’s great for applications where weathering and moisture are factors.