✓ In stock — ships within 1 business day Precision 16mm cavity-style universal glass molding — a wider U-channel profile for glass openings that require a broader trim appearance. Made from a custom compound with an OEM-type finish that stays flexible in cold and resists shrinking. Butyl pre-applied in the channel for secure adhesion to the glass edge. Sold per 75-foot roll. Specifications Width: 16mm Length: 75ft per roll Style: Cavity (C-channel) Material: Custom compound with OEM-type finish Channel Fill: Butyl adhesive pre-applied in channel Part Number: PRP1675CAV Application Universal fit — select cavity molding width to match the glass edge thickness and desired visible profile width. The 16mm profile provides a wider trim appearance than the 13mm version (PRP1375CAV). Verify glass edge and opening dimensions before ordering. What is cavity-style glass molding? Cavity or C-channel molding has a U-shaped cross-section that slides over the glass edge and provides a clean, finished appearance around the glass perimeter. Unlike underside molding, cavity molding is visible from the exterior — it's both a functional seal and a decorative trim element. Butyl in the channel bonds it securely to the glass edge. When should I use 16mm vs. 13mm cavity molding? Use 16mm (this product) when a wider visible profile is needed around the glass opening, or when the glass edge or channel geometry requires more coverage. Use 13mm (PRP1375CAV) for a narrower profile or when the glass opening has less clearance. In both cases, verify the internal channel fits the glass edge thickness. What does the butyl in the channel do? Pre-applied butyl adhesive grips the glass edge and holds the molding in place without additional adhesive. Butyl stays flexible in extreme temperatures, provides a weatherproof bond, and won't crack or harden over time the way rigid adhesives can. It also helps the molding conform evenly around corners. How much molding do I need per installation? Measure the glass perimeter and add 10–15% for waste and corner fitting. Most passenger vehicle windshields have a perimeter of 12–16 feet. A 75-foot roll covers approximately 4–5 complete glass perimeters depending on vehicle size. Is this compatible with OEM and aftermarket glass? Yes — this universal cavity molding is cut to length on-site and works with both OEM and aftermarket glass. Aftermarket glass edge profiles can vary slightly from OEM, so always verify the edge thickness on the specific glass being installed before cutting and applying.
