Compression Resistant Leak-Proof Customizable HDPE Silicone Sealant Empty Cartridge. Leak-Proof Plunger Design: Precision-engineered bottom-seal system prevents air and moisture penetration, extending shelf life. HDPE Material Construction: Made from 100% virgin High-Density Polyethylene for superior chemical resistance and burst resistance. Smooth Extrusion Experience: Ultra-smooth inner wall minimizes friction, allowing effortless extrusion of high-viscosity adhesives. Versatile Custom Branding: Available as blank tubes or with premium printing options like silk-screen, offset, and In-Mold Labeling. OEM/ODM Services: Full customization from samples, designs, or minor adjustments supported by professional factory. High Production Capacity: Annual capacity over 120,000 metric tons with 16 automated production lines and 100% inspection.