The Pro-plus Heavy Duty Silicone Gun 400ml is a manual pistol-style applicator designed to dispense 400 ml cartridges of silicone, sealants and construction adhesives. Its primary use is accurate, steady bead application for sealing, bedding and jointing tasks where control and durability are required—typical jobs include sanitary sealing around baths and showers, window and door perimeter sealing, glazing and general maintenance sealing in building work.

Constructed with a robust open-frame steel body and a corrosion-resistant powder-coated finish, this gun uses a hardened steel thrust rod with zinc plating for long service life in demanding site conditions. The drive mechanism is a ratchet-style push rod that provides approximately a 10:1 mechanical leverage, giving smooth, controlled extrusion and easier dispensing of higher-viscosity neutral- and acetoxy-cure silicones. A quick-release thumb plate allows rapid pressure relief to reduce drooling, and the pistol handle is vinyl dipped to improve grip and operator comfort. The Pro-plus accepts standard 400 ml cartridges with a conventional nozzle fit; no specialised threads or adaptors are required.

This tool is suitable for use with sealants specified to BS EN 15651 (construction sealants) and is manufactured under ISO quality systems, ensuring consistent build quality and compatibility with common industry materials. Typical industries and applications include general construction, joinery and glazing, plumbing and sanitary installation, building maintenance and light industrial sealing tasks. Marine and HVAC engineers also value the corrosion-resistant finish and durable thrust rod for repetitive use.

Key benefits are reliable corrosion resistance from the powder coat and plated rod, heavy-duty strength from the reinforced steel frame and hardened rod, and broad material compatibility with most silicone sealants and adhesives supplied in 400 ml cartridges. The ratchet drive and quick-release give good bead control and reduced wastage compared with basic applicators.

Duchy Fasteners stocks the Pro-plus Heavy Duty Silicone Gun in single units and trade packs; we also supply replacement rods and related accessories, and a full range of cartridge sizes and sealant types to suit site and trade requirements. Contact us for size and pack availability.