Hold the gun at a 45 degree angle to the surface and squeeze the trigger with a steady pressure. Keep the gun slightly slanted in the direction your are moving and draw it along slowly so that the sealant not only fills the crack but also overlaps the edges.
To get a smooth bead, fill a single seam in one stroke if you can. Pressure inside the cartridge will keep pushing out the sealant after you release the trigger; to avoid getting a lumpy bead, where several strokes and continue to move the gun as you slowly squeeze the trigger for the next stroke. When you want to stop the flow of sealant altogether, disengage the trigger by turning the plunger so that the teeth point upward and then pull the rod back an inch or so.
To get a smooth bead, fill a single seam in one stroke if you can. Pressure inside the cartridge will keep pushing out the sealant after you release the trigger; to avoid getting a lumpy bead, where several strokes and continue to move the gun as you slowly squeeze the trigger for the next stroke. When you want to stop the flow of sealant altogether, disengage the trigger by turning the plunger so that the teeth point upward and then pull the rod back an inch or so.
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