DSU-4110, DSU-450M--- used for common rigid foams, refrigerator, cold-cabinet, and sandwich panels, synthetic wood.

DSU-4110 colour< 9, OH value 435-465, water content< 0.1, Viscosity 4500-6000, PH 10-13.

DSU-450M colour< 8, OH value 435-465, water content< 0.1, Viscosity 2500-6500, PH 4.