Q: What cartridge size does the 139-3 accept?
A: Standard 1/10-gallon (10 oz / 300 mL) cartridges.
Q: What makes the “Special Deluxe” drive different?
A: A heavy 5/16″ square rod and double gripping plates provide durable, consistent feed and are rotatable for longer life.
Q: Is there a drip-reduction feature?
A: The recoil hook enables a manual drip-reduction technique at bead end; backing off the rod also helps minimize ooze.
Q: Which materials are suitable?
A: Most construction sealants/adhesives packaged in 10 oz cartridges, including silicone, polyurethane, acrylic, butyl, terpolymer, and MS polymer.
Q: Can I service the tool?
A: Yes. Wear parts like the rod, gripping plates, recoil plate, ejector, and springs are replaceable.