5.) I opened a bottle of Oratex adhesive glue, but noticed that as I applied it, it was “lumpy”, and would not spread evenly?
Shelf life: Oratex (ready mix) adhesive glue has a limited shelf life (as is the case with most modern chemicals). The safe guaranteed usable life span of the glue is 6 months, so pay close attention to your expiration date. Depending on storage and conditions encountered, the Oratex adhesive glue may last up to a year.
When the glue exceeds its shelf life, it turns from a uniform white liquid into a white liquid with concretions that appear like curdles in milk. The appearance of a thin watery top layer in a glue bottle that has been stationary for a while can be normal and non-problematic. Simply agitate the glue through vigorous shaking before using, as it is essentially solids, made up of nano-&-micro-particles suspended in water. If the glue appears semi-solid like a stiff yogurt or has a yellow-brown oily substance separating out from it, it has been frozen en route, or by accident while in storage and cannot be used. The glue is a non-hazmat material and can be disposed of without any special precautions, handling, or by any special restrictions.
Special note: You can, also, purchase Oratex adhesive glue in separate components, which, when stored under proper conditions, will last almost indefinitely. Then, you simply mix the individual components in measured amounts, when you are ready for applications.