Hardener (Similar to RC)/ TPUA-C43F

Key feature

● Similar to RC

● NCO: 8.4 ± 0.2% by weight

● Hardener appearance: almost colorless liquid

● Enhance the bonding strength of adhesive

● Increase the heat resistance of adhesive


The almost colorless hardener TPUA-C43F is designed as curing agent for adhesives based on hydroxyl polyurethane, natural and synthetic rubber. Because the solvent is ethyl acetate, hardener TPUA-C43F can be used in those countries where the use of methylene chloride is restricted.

Typical Properties

Chemical composition

Approx. 35% solution of an aromatic polyisocyanate in ethyl acetate

Intrinsic color

Almost colorless liquid

NCO content, % by weight



Soluble in various esters, ketones and aromatic solvents.

Storage stability

Reacts readily with moisture; for the best life it should be kept dry and stored at temperatures between 5oC and 32oC

Hardener Compatibility With Solvents

TPUA-C43F can be diluted with anhydrous and alcohol-free ethyl acetate, dichloropropane, trichloroethylene, acetone, methyl ethyl ketone and toluene, among other solvents. When hardener is added in relatively large proportions, aliphatic hydrocarbons can cause turbidity; but can be re-dissolved by using larger proportions of the solvents mentioned above.


A. each 0.8kg in a standard aluminum bottle 
    each 20 bottles in a standard carton

B. each 200kg in an iron drum


Notice: These values are based on the test of our present laboratory test specimens.