Hardeners / Curing Agents
Polyisocyanate hardeners for two-component PU systems. Excellent yellowing and heat resistance, accurate mixing ratios for footwear and industrial bonding.
polyisocyanatehardenercuring agentPU crosslinker
Thiophosphate Hardener F306
Model: F306Liquid cross-linking isocyanate hardener with high reaction speed, excellent crosslinkin…
View Details →
Aliphatic Polyisocyanate Hardener F309
Model: F309Aliphatic polyisocyanate hardener with excellent yellowing resistance and high crystalli…
View Details →
Aliphatic Polyisocyanate Hardener R768
Model: R768Aliphatic polyisocyanate hardener specifically formulated for water-based PU adhesives.…
View Details →
Polyisocyanate Hardener R820
Model: R820Polyisocyanate hardener with excellent yellowing resistance and moderate crystallization…
View Details →
Polyisocyanate Hardener R830
Model: R830Polyisocyanate hardener with excellent yellowing resistance and moderate crystallization…
View Details →
Polyisocyanate Hardener R950
Model: R950Premium polyisocyanate hardener with outstanding heat resistance, excellent yellowing st…
View Details →Frequently asked: Hardeners / Curing Agents
What hardener ratio should I use with two-component PU adhesive?
Typical polyisocyanate hardener ratio is 5–6% by weight of the main glue for water-based PU (e.g. Marichemix 610 + R768 at 5–6%), and 3–5% for solvent-based PU. Always follow the specific product TDS — over-dosing causes brittleness and yellowing; under-dosing causes weak crosslinking and heat-resistance failure. Mixed glue should be used within the recommended pot life (commonly 4–8 hours) and not topped up after that window.