• Heavy Duty Steel Frame: Built with a reinforced metal body designed to withstand regular trade use without flexing or bending
• Fits Up To 400ml Cartridges: Compatible with large capacity silicone and sealant cartridges for longer uninterrupted sealing runs
• Smooth Trigger Action: Precision geared trigger mechanism ensures controlled flow for clean and accurate bead application
• Stable Pressure Rod: Strong push rod delivers consistent pressure to prevent skipping, pulsing or uneven sealant output
• Comfort Grip Handle: Ergonomic handle design provides secure grip and comfort during extended use on site
• Ideal For Professionals: Suitable for plumbers, builders, decorators and installers who need a reliable mastic gun for silicone, adhesive and sealant work

The Heavy Duty Silicone Sealant Mastic Gun Up To 400ml Cartridge is designed for professional use in sealing, bonding and finishing applications. Its reinforced steel frame provides durability for frequent site work, while the precision trigger mechanism ensures smooth and controlled sealant flow for clean and accurate bead lines. The gun is compatible with silicone, adhesive and mastic cartridges up to 400ml, offering extended working time between cartridge changes. A heavy duty pressure rod delivers stable power to prevent skipping or inconsistent output, and the ergonomic handle provides comfort and control during longer jobs. Ideal for plumbers, builders, decorators and installation engineers, this mastic gun is a reliable and robust tool for applying sealants across bathrooms, kitchens, glazing work and general construction environments.