Keystone Compac® Smooth Stone (New)
A Specifier’s Favourite

Introducing Keystone Compac Smooth Stone, a seamless blend of style, performance, and cost-saving versatility in a wall system. Embraced by architects, engineers, and contractors worldwide, the Keystone Compac System excels in projects of all scales. Utilizing the trusted Keystone pin connection system, Keystone Compac Smooth Stone is ideal for gravity walls up to 4 feet tall and expansive projects exceeding 60 feet. Complement your design with corner and coping units, completing the look. The two-sided face allows for creative freestanding applications.


Unmatched Versatility and Performance Offered by:

  • Refined design that lowers weight and cuts shipping expenses without compromising strength.
  • Flexible, positive connections with reinforcement, facilitating the construction of engineered walls towering over 60 feet (18.2m).
  • Enhanced vertical drainage through face units for optimal performance.

Simplified Installation Thanks to:

  • Block shape that accommodates tight radius curves and vertical core alignment with ease.
  • Streamlined tail design for effortless handling on-site.
  • The triangular pin receiving hole enables installer-friendly adjustments during construction.
  • Vertical or battered setback construction options catering to diverse project needs.

*Available only in BC & Alberta

Sizes (H X W X D)

8 x 18 x 12 in
203 x 457 x 305 mm

4 x 18 x 14 in
457.2 x 355.5 x 101.6 mm

8 x 18 x 9 in
203 x 457.2 x 228.6 mm

Fiberglass Alignment Pins
0.5 x 5.25 in
13 x 133 mm



Sierra Grey



Every effort has been made to ensure accuracy in the colour representations found on this website. However, due to the natural characteristics of concrete, the manufacturing process and on-screen display, actual colours in the final product may vary from that shown.


DescriptionDimensionsUnit Size MMUnit Size INUnit Weight LBNo. Of Horizontal LayersPallet UnitsPallet Face Area M2Pallet Face Area Sq FtPallet Weight LB
Keystone Compac Smooth Stone Standard H X W X D 203 x 457 x 305 8 x 18 x 12 90.39 40 3.71 40 3616 
Keystone Compac Smooth Corner H X W X D 203 x 457x 228.6 8 x 18 x 9 105.10 30 2.78 30 3152 
Coping H X W X D 457.2 x 355.5 x 101.6 4 x 18 x 14 81.77 36 16.46 lin. m 54 lin. ft 2944 
Fiberglass Alignment Pins H X W X D 13 x 133 0.5 x 5.25 0.08  100/box   7.9/box 
ColoursItem No. StandardItem No. CornerItem No. CopingItem No. fiberglass pins
Charcoal 144035 144039 144046 123168 
Sierra Grey 144036 144040 144049  
Natural 144037 144041 144048  
Graphite 144038 144042 144047  


Garden Walls Application Icon

Garden Walls

Retaining / Support / Freestanding Walls Application Icon

Retaining / Support / Freestanding Walls

Product Notes

Pallet Information

Sold in full pallets only. Any bundle of Keystone Compac Smooth Stone will be charged a $35.00 returnable pallet fee 

Unit of Measure

The Unit of Measure for Keystone Compac is Each.  

Order Considerations

Contact your local Barkman sales representative for information on minimum production cycles required for special or custom-order products. 


Use 2 fibreglass pins per block to connect. For near vertical batter, place pins in the front hole location. For an 8.5-degree batter, place pins in the back hole location. For a 4-degree batter, alternate pin locations, starting with the back pin location on the first course, the front location on the second course, and alternating on consecutive layers. Alignment pins are sold separately. For information on wall heights, consult the product installation guide and technical specifications. Check your local building codes and consult a professional engineer when required.