Blog

JR 3000 vs JR 3001 vs JR 3010 vs JR 3003 vs JR 3125 — Which unmodified epoxy resin should you use?

When specifying an unmodified epoxy resin you’re balancing process needs (wetting, degassing, pumpability), optical or adhesive performance, and formulation flexibility. The JR series covers that spectrum — from lower-viscosity casting bases to very-high-body adhesive backbones. Below is a pragmatic comparison that maps product specs to the problems your shop actually faces.

Technical snapshot (quick)

• JR 3010 — EEW 180–188, viscosity 8,000–11,000 mPa·s (lower-viscosity, YD127 comparable).
• JR 3000 — EEW 185–195 (typ 188), viscosity 10,000–15,000 mPa·s (typ 11,800). General multipurpose baseline.
• JR 3001 — EEW 188–199, viscosity similar to JR-3000, extra-clear (APHA < 20) for optical work.
• JR 3003 — EEW 200–230, viscosity 20,000–40,000 mPa·s. High body for adhesives & brushable coatings.
• JR 3125 — EEW 200–250, very high viscosity — formulator backbone for high-body adhesive systems that will be tuned with diluents/hardeners.
  All are supplied in 10/20/30 kg packs (barrels available) and show robust shelf stability in company packaging.

The core tradeoffs (what matters on the floor) Reliable Waterproofing, Minus the Guesswork

• Wetting & bubble release: lower viscosity (JR 3010, JR 3000, JR 3001) wets substrates better and degasses more easily — ideal for laminates, clear casting and potting.
• Body & anti-sag: higher viscosity (JR 3003, JR 3125) gives bead retention, gap-fill and vertical hold without heavy thickeners — ideal for adhesives and thick decorative coatings.
• Optical clarity: JR 3001 is the go-to when base resin tint matters (APHA < 20); note UV yellowing remains a function of hardener and exposure.
• Formulation flexibility: EEW ranges affect equivalent calculations and how a hardener behaves; ultimately cure kinetics & yellowing are governed primarily by hardener chemistry and batch conditions rather than resin identity alone.