This Tajima CNV-900SP26 is the "big brother" to the previous model—it is the quart-sized (29 oz) equivalent of the high-thrust rotary caulk gun.

• 1:26 Thrust Ratio: Just like the 10 oz version, this features a massive 26:1 thrust ratio. When you are dealing with 29 oz tubes of high-viscosity construction adhesive or industrial sealants, the material is significantly harder to push. This ratio is specifically engineered to reduce physical fatigue when laying down long beads of heavy-duty product.

• Capacity: Designed specifically for quart (29 oz) tubes, it is the go-to tool for large-scale projects like deck construction, sub-flooring, or extensive masonry work where you don't want the downtime of constantly swapping out smaller 10 oz cartridges.

• Ergonomics & Control: The 360-degree rotating barrel is even more important here than on smaller guns. Because a full 29 oz tube is heavy and awkward, the ability to rotate the nozzle without rotating the entire heavy gun makes it much easier to maintain a clean, consistent bead on vertical or horizontal seams.