Max-Blast Stemming Plugs'friction fit in the borehole provides a positive seal for positive results! The picture illustrates the Max-Blast method of action: Upon detonation the expanding gasses impact the plug and it begins to fold into itself. This process of folding expands the plugs diameter - creating a positive seal in the borehole. You can clearly see in the plug recovered after use that the Max-Blastaccordion design folded on the annular rings and prevented the intense explosive energy from passing up through the stemming material.
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