Tie-Coat Primer Pint

The POR-15 Tie-Coat Primer Pint is a urethane-based gray primer designed for serious automotive restoration and modification work. This product serves as a critical foundation layer between bare metal and topcoat finishes, preventing rust formation while ensuring superior paint adhesion on undercarriage components, frame rails, and engine bay surfaces. Ideal for both professional mechanics and DIY enthusiasts, it is perfect for restoring classic vehicles or protecting newly welded seams.

This primer features a urethane chemistry that provides exceptional corrosion resistance and moisture barrier properties, outperforming conventional primers. The gray formulation offers excellent coverage and visibility during application, allowing users to identify missed spots and ensure even coating thickness. The urethane resin system cures to a hard, durable finish that resists exposure to fuel, oil, and road salt while maintaining flexibility to accommodate thermal cycling and vibration.

With a container size of 16 oz, this pint is ideal for touch-ups, small fabrication projects, and detailed restoration work where larger quantities would be wasteful. It is compatible with various substrates, including steel, cast iron, and aluminum, making it versatile for different automotive applications. Whether you are performing frame rail protection or working on undercarriage components, this primer is an essential tool for achieving professional-grade results.