Is Simtek (Bufftech) a composite fence?

SimTek (now called Bufftech Molded Composite Fence) is not a composite fence in the same sense as Trex. SimTek is made fully of synthetic materials (plastic) and thus falls more in line with vinyl fence systems. Trex composite combines wood flour and polyethylene plastic, which gives the fence the unique benefits of both materials, primarily the natural look and density of wood with the low-maintenance benefits of non-organic plastic.