View All Keystones and Trim Blocks

Universal fake stone keystones and trim blocks are need-to-have architectural accents that mimic the look of their real stone counterparts, allowing you to add charming detail to your archways and window frames without undertaking hours of expensive masonry work.

Available in three pieces that can be used alone or together, keystones are available in neutral gray and tan and will add a beautiful decorative accent to a doorway, arch or window indoors or out.

Surround a curved window or door with fake stone trim blocks, easily creating a nice turning post between the entranceway and surrounding wall without need for cutting or mitering to fit.

All the keystones and trim blocks are made of heavy-duty yet lightweight polyurethane material, making them impervious to moisture, extreme climate, even pests. A complete installation can be finished easily by the average homeowner, with step by step instructions to help you all the way.