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How to send mortar on concrete blocks (jet) technical gestures Masonry-Martinez.fr This video shows, explains how to send traditional mortar jet or first layer or bonding layer and the second layer or body of the coating. On concrete blocks The way to do wrist flick Technical gestures: The gesture of the wrist and the trowel Thank you for sharing this video as much as possible, this way of coating, this technical gesture must not be lost, which is happening because fewer and fewer masons do the coating, they are replaced by facade workers who do single-layer, who in the vast majority have never done a traditional coating. So when you have the technique, make the most of it for others.