His production team spent months whipping up different batches of the corn syrup/glycerine mixture to get the right formulas.

It needed to ooze in some instances, glide in others.

I had no idea how complicated it would be, says production designer Jefferson Sage (Spy).

Image

Credit: Hopper Stone

The special effects guy would mix up batches and play with it.

Then he would make videos dumping slime on the ground, squirting it out of a hose.

We needed to know what it does when it hits something.

What happens to it when it drips down a wall?

It makes a mess.

Here, they venture to explain how it felt.

But as you give a shot to wash it off, it regenerates.

So the more you make a run at wash it off, the slippier it becomes.

LESLIE JONES:Its terrible.

Its like that slime stuff they used to sell in a little jar.

MCCARTHY:But it has a viscosity as you touch it, like the hair goop from the 80s.

KRISTEN WIIG:With a little bit of mucus.

MCCARTHY:And a whisper of vomit.

KATE MCKINNON:Its like if you have dry mouth and you buy that fake saliva.

MCKINNON:Oh, yeah.

you could buy spit.

you’re free to get anything nowadays.

Ghostbustersopens in theaters on July 15.