Primer 251

Primer 251 is a two-component, 100% solids (no VOCs, no solvents), flexible, elastomeric polyurethane primer and sealant. It is used to prepare surfaces for the application of Rhino Linings. It is easily applied with a brush, roller or spray equipment, providing high resistance to acids and hydrolysis and has excellent results in salt spray, water immersion and hot air tests.

Rhino Primer 251 is highly resistance to acids, hydrolysis and salt spray. Withstands mechanical stresses where the liner is subject to impact.

Download Primer 251 Technical Data Sheet


Primer 251 Formulation Properties

  • Cure Time: 120 minutes @ 60° F (16° C) / 45-60 minutes @ 90°F (32° C)
  • Organic Content: None. 100% solids
  • Film Thickness Range: 2-3 mils average
  • Base Material Colors: Isocyanate: – brown / Resin: gray

Typical Primer 251 Applications

Recommended Substrates:

  • Fiberglass
  • Metals
  • Concrete
  • Polyurethane
  • Most plastics and dry wood (under 16% moisture)

Not Recommended For:

  • Highly porous substrates
  • Substrates/surfaces containing moisture

Primer 251: industry applications

Water - WasteWater
Water - WasteWater
Chemical ContainmentSecondary ContainmentPrimary Containment


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