Any ideas on how to make slime more stretchy and thick? Had a blast with this lube slime but still too thin

Try to buy something from https://www.messysupplies.com

u can mix it with warm water and i feels every nice.

Well depending on what you used to make this lube slime to make it thicker just add less water that might also make it more stretchy but I am not sure

MessySupplies VIVI Lite and VIVI Extreme are both the stretchy type. To make a thicker batch use a smaller amount of water.
The Extreme (10L pack) made with about 6-7L of water is a crazy fun mess to play in

You could try mixing a bit of gunge powder into the slime lube to thicken it?

I can remember a much older product called 'Bodyslime'- which was a thick stretchy/stringy gunge, not sure if the supplier/brand is still available??
--Edit-- Apparently this was a mix of Xanthan gum and Borax slime??

Bodyslime could be another option. It's from a German supplier, ships worldwide though.

Bodyslime.com

Slime bath, mixed with shaving foam, makes fantastic thick stretchy mess that is lightweight so doesn't just all hit the deck!

PVA glue works.