Full metal construction — engineered for superior durability and chemical resistance in demanding industrial and aerospace environments

Durable metal ratchet withstands daily professional use — delivering consistent dispensing force and reliable operation under demanding conditions

Secure threaded connection to the ratchet handle — ensures uninterrupted material flow during critical applications and enables quick cartridge changes

Minimizes operator fatigue during extended use periods — engineered for comfortable, sustained operation in high-volume field and workshop applications

Constructed from premium-grade metal components throughout — delivering superior durability, chemical resistance, and long-term mechanical integrity that outlasts plastic-body alternatives in the most demanding professional applications and environments.

The metal ratchet mechanism delivers consistent, controlled material flow with every stroke — enabling precise application of sealants, adhesives, and potting compounds with the accuracy required for critical aerospace and industrial joint sealing operations.

The innovative threaded retainer mechanism creates a secure connection to the ratchet handle — eliminating interruptions during critical application processes and ensuring the continuous, consistent bead quality that professional sealant work demands.

The threaded retainer design facilitates quick cartridge replacement when needed — a feature that significantly enhances workflow efficiency and productivity during high-volume or multi-material application operations.

The customizable retainer system accommodates 8 cartridge sizes — 1, 2.5, 6, 8, 12, 20, 32 oz., and 1/10 gallon disposable options — with metal or plastic retainers available to suit specific application requirements and environmental conditions.

The ergonomic design minimizes operator fatigue during extended use periods — enabling sustained, high-quality application work across long maintenance shifts, production runs, and demanding field operations without compromising dispensing accuracy or control.

Metal retainers provide maximum durability and chemical resistance — the natural companion to the all-metal 850 body for high-cycle, high-demand industrial and aerospace applications where long-term mechanical integrity is non-negotiable.

Plastic retainers offer a lightweight, cost-effective alternative for standard sealant and adhesive applications — providing reliable performance across a wide range of materials while reducing overall tool weight for extended field use sessions.

Effective material extrusion — sized to match the selected cartridge for consistent, controlled material output with every ratchet stroke

Material integrity maintenance — prevents premature curing, material waste, and contamination between application sessions

Proper storage & contamination prevention — seals the cartridge end during storage and between applications to extend cartridge usable life

Aircraft sealant application, fuel tank sealing, structural adhesive bonding, and potting compound dispensing in MRO and manufacturing

Precision adhesive and sealant application for vehicle assembly, body sealing, and specialty automotive manufacturing processes

Structural sealant and adhesive application for building envelope, glazing, curtain wall, and specialty joint sealing applications

General industrial adhesive and sealant dispensing for assembly, maintenance, and repair operations requiring precision material application

Premium metal construction — superior durability and chemical resistance

Metal ratchet — consistent, controlled material flow with every stroke

1 oz. to 1/10 gallon — full Semco® cartridge ecosystem compatibility

Minimizes operator fatigue — built for extended professional use