All of the silicone I have used says to let it cure for 24 hours if I recall correctly. It will feel try to the touch after a couple hours, but will still be spongey if you push on it. It takes almost a whole day to dry to where it is solid inside and out. Of course how thick it is and the outside temp and things will also affect this, but IME 24 hours is usually more than enough. I'm not familiar with GE silicone 1, I figure you already checked this out, but it doesnt have any additives does it? I figure it probably is non-toxic but like I said I'm not familiar with it