Fibrelyte is a proven polyester pre-mix with calcium carbonate and polyester resins interlaced with fiberglass and ultra-violet inhibitors. All Fibrelyte utility boxes are designed to receive either Fibrelyte, standard Christy concrete or cast iron lids.

Fibrelyte is a durable, state and utility approved, non-combustible material. All dimensions shown are approximate. Box and lid also comes with bolt down feature.