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Boral’s TruExterior Trim now comes in a 1 1/2-inch thickness. Made from PolyAsh, it has a claimed expansion rate of just one-third that of PVC and is compatible with silicone or acrylic caulking (unlike PVC trim, which requires a solvent-based caulk). The material can be painted with any acrylic latex paint and is approved for ground contact, and screws can be driven flush into the surface without mushrooming. Boral Composites, 800.926.7259, boraltruexterior.com