Sandtex Trade Rust Inhibiting Primer Undercoat Prepare your exterior wood and metal surfaces with the superior protection of Sandtex Trade Rust Inhibiting Primer Undercoat. This high-performance, flexible, solvent-based primer undercoat creates the perfect base for long-lasting Eggshell and Gloss finishes, ensuring enhanced adhesion and durability. Key Features: Adhesion Promoting Formulation: Ensures strong adhesion for topcoat finishes, enhancing durability. Combined Primer and Undercoat: Simplifies preparation by providing both primer and undercoat in one product. Ideal for Exterior Wood and Metal: Versatile formulation suitable for a variety of exterior surfaces. Coverage & Application: Number of Coats: Apply 1 coat for effective priming and undercoating. Drying Time: Touch dry in 4-6 hours; ready for recoat in 16-24 hours. Application Methods: Suitable for application by brush or roller.