When your blasting operation demands reliable stemming for small-diameter holes, Clay Dummies provide a proven, effective solution. Built with high-quality fire-clay and inert materials that protect initiation cords, these plugs enable precise compaction and energy containment in the borehole.
Why choose Clay Dummies?
Designed specifically for smaller-diameter blast holes (e.g., 1-1/4″ × 12″, 1-3/8″ × 12″) where standard large-diameter plugs may not be appropriate.
Constructed from West Virginia Bolivar fire clay combined with selected inert ingredients—so they maximize containment of explosive energy while being safe on wires and cords.
Time-tested in coal-mining and specialty-blasting environments yet applicable in a broader range of blasting operations.
Key features:
High compaction: The material compacts well to fill the stemming zone and minimize gas and energy escape.
Protects initiation systems: Designed to minimise damage to detonator wires and down-lines in the hole.
Multiple sizing options: Example sizes include 1-1/4″ × 12″ (30 per box), 1-3/8″ × 12″ (25 per box) and more.
Non-returnable, made for direct ship from manufacturer—be sure to plan order lead times accordingly.
What this means for your operation:
Using Clay Dummies helps you retain more explosive energy within the borehole, which leads to better fragmentation, fewer misfires or blow-outs and improved overall blast efficiency. Because the plugs are tailored for small diameters and built to protect initiation hardware, they reduce the risk of stemming failures, which can cause fly-rock or excessive air blast.
Selection & usage tips:
Choose the proper plug diameter to match your blasthole size—incorrect fit can compromise stemming effectiveness.
Verify the stemming length (the plug plus additional stemming zone) meets your blast design requirements.
Ensure that the area above the explosive column is properly blocked—Clay Dummies act as a plug but must be seated and followed with quality stemming material if required.
Store in a dry area to preserve integrity, and plan for lead times since these items are non-returnable.
