Sealant gun Topex closed 300 ml — manual cartridge applicator for 300 ml cartridges

Manual closed sealant gun Topex for 300 ml cartridges is a tool designed to dispense sealants, adhesives and silicone from standard 300 ml cartridges. The closed-frame design provides steady cartridge support and helps maintain alignment during application. The applicator is intended for controlled, manual dispensing where consistent bead shape and reduced cartridge wobble are required.

Advantages

The Topex closed sealant gun features a robust closed-frame construction that increases stability and reduces flex during use. It offers smooth manual operation for accurate control over flow rate, resulting in more consistent bead formation. The design supports standard 300 ml cartridges securely and simplifies cartridge replacement. The tool is constructed for durability under typical construction and repair use.

Suitable for

• Applying silicone and sanitary sealants around bathtubs, sinks and sanitary fixtures
• Bonding and sealing joints in window and door installations
• General construction and repair sealing tasks
• Applying adhesives for light assembly and mounting work

Key specifications

• Compatibility: standard 300 ml cartridges
• Frame type: closed-frame design for improved cartridge support
• Operation: manual trigger mechanism for controlled dispensing
• Material: metal and polymer components for durability and reduced weight
• Application: suitable for sealants, adhesives and silicone materials

How to use

Load a standard 300 ml cartridge into the closed frame, ensuring the cartridge nozzle faces forward. Cut the cartridge tip to the desired bead diameter and attach the nozzle. Depress the trigger slowly to start dispensing, adjusting pressure and trigger speed to control bead thickness and flow. Release the trigger to stop material flow and, if needed, use the rod retraction to relieve pressure after use. Replace cartridges as required following manufacturer instructions for the sealant or adhesive used.

Usage recommendations

For best results, use cartridges compatible with a manual applicator and select an appropriate nozzle size for the required bead width. Keep the gun clean after each use to prevent material buildup. Store the tool in a dry place and inspect the trigger mechanism and rod for wear before prolonged use.