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CSS-ESLPL Long Pot- Life Epoxy Primer and Saturant


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CSS-ESLPL is a two-component, long pot-life, high-strength, high-modulus epoxy resin system used to prime substrates and saturate the Simpson Strong-Tie® Composite Strengthening Systems (CSS) fabrics. When extended with fumed silica, thickened CSS-ESLPL is used as a high-performance substrate repair material and CSS finish coating. This product has been evaluated per ICC-ES AC125 for concrete and unreinforced masonry strengthening using externally bonded fiber-reinforced polymer (FRP) composite systems.

Key Features

  • Long pot-life
  • Extended working time at high temperatures
  • High elongation
  • Ambient cure
  • Minimal odor
  • High versatility


Seismic Retrofit

  • Shear strengthening
  • Displacement/ductility
  • Life safety

Load Rating Upgrade

  • Increased live loads
  • New equipment
  • Change of use

Damage Repair

  • Deterioration/corrosion
  • Blast/vehicle impact

Defect Remediation

  • Size/layout errors
  • Low concrete strengths

Blast Mitigation

  • Hardening
  • Progressive collapse

Mixing Ratio

  • 2A:0.96B by volume

Storage Conditions

  • Store material in a dry area between 45°F (7°C) and 95°F (35°C) with no exposure to moisture

Shelf Life

  • 2 years in unopened container


  •  6 g/L (mixed)


Kit Size / Model No.

  • 2.96 US gallon (11.2 L) / CSS-ESLPL-3KT
  • 148 US gallon (560 L) / CSS-ESLPL-148KT

Limited Warranty

  • This product is covered by the Simpson Strong-Tie RPS Product One-Year Limited Warranty, which is available at strongtie.com/limited-warranties or by calling Simpson Strong-Tie at (800) 999-5099

Related Literature

Code Reports & Compliance