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SYSTEM 20 National Rule 4:1 High Build Primer - 1 Gallon Tin - G - U-POL

Part #: 2253

The U-POL SYSTEM 20 National Rule 4:1 High Build Primer (Model 2253) is a professional-grade solution engineered for superior performance in automotive and industrial refinishing applications. This 1-gallon primer is designed to deliver exceptional film build and outstanding surface leveling properties, providing a robust and uniform foundation for subsequent topcoats on both minor spot repairs and extensive panel work.

Key Features:

  • Exceptional Build & Leveling: Formulated to offer excellent film thickness and superior surface leveling, effectively filling imperfections and ensuring a smooth, uniform finish.
  • Versatile Substrate Adhesion: Capable of direct application to bare metal, most plastics, and unsanded E-coat, enhancing efficiency in the repair process.
  • Effortless Sanding: Engineered for easy wet or dry sanding, streamlining preparation and ensuring optimal adhesion for the topcoat.
  • Tintable Formula: Allows for tinting with up to 10% urethane mixing base, providing flexibility for improved color holdout and matching.
  • Broad Compatibility: Adheres effectively to a wide range of professional substrates, including GRP, SMC, fiberglass, polyester filler, and existing OEM finishes.

Applications:

This high build primer is an essential component for professional technicians and mechanics undertaking various repair and refinishing projects. It is specifically designed to prepare surfaces, offering outstanding adhesion and a consistent base for any topcoat system.

  • Spot Repair and Large Panels: Ideal for addressing localized damage as well as providing comprehensive coverage for larger bodywork sections.
  • Direct-to-Metal Capabilities: Can be applied directly to bare metal, though an acid etch primer, such as U-POL ACID #8, is recommended for properly prepared aluminum and galvanized surfaces to ensure optimal adhesion and corrosion protection.
  • Multi-Substrate Preparation: Suitable for use over GRP, SMC, fiberglass, polyester filler, and existing OEM surfaces, making it a versatile choice for diverse repair environments.
We have 3275 in stock
List: $120.95 Save: $59.52

$61.43

Free shipping on orders over $250
Lower 48 states and DC. Excludes freight and oversize items.
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  • Model: 423478
  • Shipping Weight: 14.78lbs
  • UPC: 5010796107024
  • Manufacturers Part #: 2253
  • Manufactured by: U-POL
  • Also Known As: UPO2253

This product was added to our catalog on Wednesday 06 May, 2026.

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