Royal Building Products’ Celect Cellular Exterior composite siding replicates the beauty and aesthetics of natural wood while remaining low maintenance and durable on a building for a lifetime. Celect’s profiles—Clapboard, Board & Batten, and Shake—offer unlimited design possibilities and are available in 18 fade-resistant colors. They feature Royal Building Products’ patented interlocking seam design, which enhances a building’s curb appeal.