... .The main part of ST03 Sealant-spreading machine is base stock pump,curing agent pump,proportioning pump,up and down system ... of the base stock,sealant compound system,pneumatic system,hydraulic system and electric system ... .Main technique parameter Mixing ratio 6:1—14:1 Base stock barrel: 55gallon(200L)Curing agent barrel; 55gallon(20L) Maximum gas ...