Solutions that thicken over time

I have been experimenting with using Agar to make a jelly that stays solid at body tempreture and it got me thinking is there a enema solution that thickens over time. The idea is a thin solution goes in and a thick solution comes out.

Agar wont work as it sets fully at 40 degrees celius, and is too viscuous to work at anything around 40.

Gelatine wont work as it need to be kept cool to begin to set.

Does anyone have any ideas on a thickening solution that would work? I have seen ideas for thick solutions but nothing that would thicken whilst inside.

Metamucil. Its a fiber drink thickens in time and when at body temperature.

Xanthan gums are used industrially and in cooking to make watery mixtures firmer, even jelly like, depending on concentration. I've seen them used at room temperature and are available on Amazon etc.

Is the idea that it sets almost like jelly inside you, so has to be squeezed out like poo? If so, I'm glad to see that even in the mucky world of klismaphilia, there are people seeking to make it muckier!

I'd avoid going this far in seeking solidity however:

http://www.weirduniverse.net/blog/comments/concrete_enema

The idea of artificial poo has been around for a long time.

There are Barium pastes that are injected with something like a caulking gun fitted with a ca F 32 ca 10" colon tube used to diagnose pooing problems. The patient is prepped, the artificial poo is injected filling their lower colon, then the patient sits on a special toilet chair in font of an x-ray machine and ties to poo while x-ray movies are taken.

There also used to be an ‘artificial stool’ sold, but I can no longer find it. It was like a sausage that was inserted into the patient for similar tests.

Self raising Flour

Gravox - As used in making gravy