RB68 is a composed salt of cyclic-amidine and multi-acid, equivalent to B68 of HUELS AG company from Germanic.RB68 is a low-gloss curing agent making the film much lower gloss, with high mechanical strength and fine appearance.

RB31 is one of cyclo-amidine compounds, equivalent to HUELS AG B31, RB31 is a low temperature and fast curing agent applying to high-activated epoxy-resin minutes at 200℃.