Greg
This is baffling, the orange cap stuff is about as fool proof as possible,
I'm not sure if the OP is using the regular orange cap or the orange cap limonene. The regular orange cap, as I mentioned above, is 20ml and comes in a hexagonal jar. The limonene variety comes in a 40ml jar. If it is the limonene version, I can see it being not as strong (though I've never used it so I may be off-base)
On a related note, does anyone know if the 40ml white cap is the same cement as the 20ml orange cap?