Flex cement
 

Does anyone know of a solvent that will make flex cement more fluid? I have two bottles that have never been opened and both are very thick.

If you mean Dave's Flexament, there is a thinner made for that product - Flexament thinner.

Thanks Bigfeet,
I was able to find a thinner at the fishin hole after calling around. not too many outlets carry thinner from what I gather.

If I'm not mistaken, I think Flexament is an Acetone based product. Fingernail polish remover is often Acetone, and you might be able to use that to thin it as well. Not 100% sure of that but if you are in a bind and have access to a little Acetone, you might want to try a little bit of glue and see if it works.

Home depot, Rona, or any hardware store carry actone, last time I bought any it was under $10 for a litre. Pick some up and you are set for years. Not only thins Flexament, but Sally Hansens, removing epoxy from tools and anywhere you don't want it, removing lacquer, cleaning glue residue of all kinds of stuff, etc.