Robust DIY single piston caulking gun for use with styrene-free polyester resins packed in 1:1 ratio in standard 300ml single chamber cartridges. Generates high pressure for extrusion of 2-part resin components. Can also be used to dispense other cartridge products, such as Ultracure 380 DPC cream and Wykabor 40 wood preservative. Colour and design may vary
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