... /90mins) 3.5±1Mpanormal temperature(25°C/24hours) 2.5±1Mpahardness initial stage after hardening shore hardness above ... up and down±1HDAfter sulfuric acid dipping weight changeWithin 2.5%note:1,as the temperature falls,bonding strength ... ,curing hardness falls gradually until fragility degums. 2,if there is deposit in A,B groups,stir ... be used. 3,storage life:six months 2012A/B clear glue