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Mastic Keystone Trim for 120 in. Mantel System, White 7 in. x 7-1/2 in.
Regular price $32.91Orders start at $399 — combine any items to reach the minimum. Learn more
Mastic Keystone Trim for 120 in. Mantel System, White 7 in. x 7-1/2 in.
The Mastic Keystone is the finishing trim piece for the Mastic 120 in. mantel system, made in White and measuring 7 in. x 7-1/2 in. Each sell unit is one piece (PC), sized to complete the mantel assembly on a siding facade. Pair it with the matching 120 in. mantel system components for a coordinated exterior accent.
Key Features:
- Mantel System Finishing: Designed as the keystone accent for the Mastic 120 in. mantel system.
- Crisp White Finish: Comes in White to coordinate with other Mastic trim and siding accessories.
- Compact Dimensions: Measures 7 in. x 7-1/2 in. for the mantel crown center.
- Low Maintenance: Exterior-grade trim that installs like standard siding accessories.
- Single Piece Unit: Sold per piece so you can order exactly what the mantel layout requires.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Mastic |
| Sell unit | 1 piece |
| Product line | Mastic exterior siding accents |
| Available colors | White |
| Available sizes | 7 in. x 7-1/2 in. |
| Dimensions | 7 in. x 7-1/2 in. |
| Finish / texture | White |
| Intended use | Keystone accent for 120 in. mantel system |
| Assembly | Installs as part of the mantel system on siding |
Coverage & How Much You Need:
One piece covers the keystone position of one 120 in. mantel system; no area coverage applies.
Fit and Compatibility:
Made for the Mastic 120 in. mantel system; order the matching mantel components separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One White keystone trim piece, 7 in. x 7-1/2 in. The mantel system is sold separately.
Q: Will it fit other mantel sizes?
A: It is specified for the 120 in. mantel system; confirm the mantel model before ordering.
Q: What color is it?
A: White.
Q: How is it installed?
A: It installs as the center accent of the mantel assembly, like other Mastic siding accessories.
Q: Is the material specified?
A: The sources do not state the material; it is part of Mastic's exterior siding accessory line.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Match this keystone to the same color family as your mantel and door surround trim for a seamless look. Install it after the mantel side pieces are fastened so the reveal lines up. Verify your mantel is the 120 in. system before ordering, since keystone sizing is specific.
Use approved fasteners and follow Mastic's installation instructions when working on ladders or scaffolding.
Complete your 120 in. mantel system with the Mastic Keystone in White today.
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