Ever had a tube of RTV that would not cure? I just had a tube of Permatex Ultra Grey that didn't cure after two days. I usually have good luck with it and the Ultra Black version. Yes it takes overnight to set up properly but I have the time as I usually off to another job while awaiting its curing. If get in a big hurry I could alway apply some the Tuff Torq aluminum RTV I have here, IT start setting up before I even get things together.
You know I think it is called multitasking. Sorta like me this morning listening to the toons, drinking a couple cups of coffee, typing this message, and petting a hen. All while thinking today's projects.