Lightweight yet durable body specifically engineered with standard 6 oz. Semco® Cartridges — optimized for both workshop bench use and portable field applications

Metal ratchet handle engineered for outstanding durability and reliable operation under demanding industrial conditions — delivering consistent dispensing force with every stroke

Threaded retainer creates a secure connection to the ratchet mechanism — ensuring continuous, uninterrupted material flow during critical applications while allowing quick cartridge changes when needed

The metal ratchet mechanism delivers precise, controlled material flow with every stroke — enabling technicians to apply sealants, adhesives, and specialized materials with the accuracy required for critical aerospace and industrial applications.

The threaded retainer's secure connection to the ratchet mechanism ensures continuous, uninterrupted material flow during critical application processes — eliminating the stops and starts that can compromise sealant bead quality and joint integrity.

The threaded retainer design enables fast, tool-free cartridge changes — minimizing downtime between cartridge swaps during high-volume or multi-material applications, keeping maintenance and production workflows moving efficiently.

While standard with 6 oz. cartridges, the 850 adapts to 8 different cartridge sizes — 1, 2.5, 6, 8, 12, 20, 32 oz., and 1/10 gallon — with compatible retainers available in both metal and plastic variants, making it the most versatile tool in the Semco® manual dispensing lineup.

The combination of durable stainless steel body and ratchet handle delivers the ideal balance of lightweight portability for field use and robust durability for demanding workshop environments — performing reliably across both settings without compromise.

Complete system functionality requires compatible plungers, cap seals, and end caps — essential accessories that ensure proper material containment and precise dispensing control, preventing waste and maintaining material integrity throughout the application process.

Adaptable to various retainer sizes provide maximum compatibility for high-cycle, high-demand industrial and aerospace applications — ideal for environments where chemical resistance and long-term mechanical integrity are critical requirements.

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

Sized to match the selected cartridge — drives material through the cartridge during dispensing for consistent, controlled output

Ensures proper material containment within the cartridge — prevents premature curing, material waste, and contamination between uses

Seals the cartridge end during storage and between applications — maintains material integrity and extends cartridge usable life

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

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

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

Metal ratchet handle — consistent, controlled material flow with every stroke

1 oz. to 1/10 gallon — the most versatile manual dispensing tool in the Semco® lineup

Stainess steel body + ratchet — engineered for demanding industrial and aerospace environments