SienaStone® Smooth


Granite Blend

Granite Blend



Light Grey

Light Grey

Midnight Charcoal

Midnight Charcoal

Custom Options

Custom Colors and Finishes
With so many different options for customization we ask that you contact your local Unilock Representative for more information about customizing this product.
Minimum quantities will apply.

Shapes & Sizes

Standard 375

120 cm x 18 cm x 37.5 cm

47.25" x 7.125" x 14.75"

Corner Unit 375

120 cm x 18 cm x 37.5 cm

47.25" x 7.125" x 14.75"

Coping 383

120 cm x 18 cm x 38.3 cm

47.25" x 7.125" x 15.125"

48" Step

120 cm x 18 cm x 50 cm

47.25" x 7.125" x 19.625"

72" Step

180 cm x 18 cm x 50 cm

70.875" x 7.125" x 19.625"


Garden Wall
Retaining Wall
Seat Wall


Unit Thickness Sq. Ft. Bndl. Sq. Ft. Layer Sq. Ft. Stone Layers Bndl. Ln Ft Sec. Soldier Ln Ft Bndl. Soldier Sq Ft Ln Ft Soldier Ln Ft Sec. Sailor Ln Ft Bndl. Sailor Sq Ft Ln Ft Sailor Units Sq. Ft. Lbs Bndl. Lbs Sec. Units Bndl.
Standard 37537.5--------------
Corner Unit 37537.5--------------
Coping 38338.3--------------
48" Step50--------------
72" Step50--------------


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Important Information

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Use our interactive paver calculator to get quick, easy and accurate specifications for your project!

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ASTM C 1372 Standard Specifications for Dry-Cast Segmental Retaining Wall Units

Conforms to:

  • C140 for Absorption and Compressive Strength > 3000 PSI
  • C1262 for Freeze Thaw Durability <1% mass loss
  • C1372 Overall dimensional variations permissable for width, height and length ± 1/8” (±3.2mm)

Unilock standards exceed 6,000 PSI for SienaStone products with:

  • 4% absorption avg.
  • 5% absorption max.
  • Dimensional Accuracy +/- 5/64” (±2.00mm)

Test results available upon request



Materials & Resources: LEED V4:

Building Product Disclosure and Optimization

Sourcing of Raw Materials – Sourcing of Raw Materials and Extraction • 1 point

Sourcing of Raw Materials – Leadership Extraction Practices • 1 point

Material Ingredient Reporting – Material Ingredient Reporting • 1 point

Material Ingredient Reporting – Material Ingredient Optimization • 1 point

Environmental Product Declaration • 1 point


View Product Datasheet