Prime Bubble-X is a sheet / air-bubble co-extruded PP board featuring a newly patented technology. Thermoformed core and unique matte finish for exceptional durability. High strength-to-weight ratio. Weather, moisture and chemical resistant. Nontoxic and hypoallergenic. 100% recyclable polypropylene. Used to protect surfaces more efficiently than plywood or masonite. Density - 1520 GSM.