So I replaced a PVC closet flange yesterday. Today I wanted to make sure the joints were hardened before putting the toilet back on. So I was gently pushing on the excess primer/cement near the joints with a small screwdriver to make sure they were hardened. Its tough to tell in most spots, but where ever I got a bit of excess I could tell that I can easily push on this excess with the screwdriver. I was expecting it to be rock hard. I used a standard purple primer with a general purpose schedule 40/80 cement. Note that my PVC is schedule 30 (which I understand is just thin wall schedule 40). Am I doing something wrong? Its been 24 hours now.