Dripless HR300 High Ratio Caulk Gun, For 185ml Cartridges

The HR300 is built for 185ml cartridges, and fits standard caulk cartridges including Infinity's 185ml "Zillas." Pair it with our adhesives and sealants.

It has a 26:1 thrust ratio, which multiplies your trigger force so even thick sealants flow smoothly and with fine dosage control.

Yes. The HR300 includes a built-in seal punch, so you can puncture the inner seal of a cartridge without reaching for a separate tool.

Yes. The HR300 has a fully rotating barrel, which lets you angle the nozzle as needed while you work without twisting your wrist.

It is a heavy-duty, high-ratio specialty gun with a 26:1 thrust ratio, twin gripper plates for long wear, a rotating barrel, a built-in seal punch, and an adjustable screw to cut thrust gaps — far more refined than a typical caulk gun.

The gun's adjustable screw lets you cut thrust gaps, which helps control flow and reduce after-drip. Combined with the smooth 26:1 mechanism, it gives you precise control over the bead.

The twin gripper plates engage the plunger rod to push material through the cartridge. Using two plates spreads the load and is designed for long wear and durability.

It is made by Dripless, a manufacturer known for heavy-duty, well-engineered caulking and dispensing guns.

The HR300 includes an adjustable screw to cut thrust gaps, letting you tune the gun's behavior. Combined with the 26:1 ratio, it allows fine control over dosage for any 185ml tube.

Stock it alongside our wood glue and adhesives, reliable clamps for glue-ups, and other finishing supplies.