On mobile, tame a saber tooth and run the cave in the south, killing and harvesting everything. Do this a few times until you have about 20k chitin. Then take a doedic and get about 40k stone. (Note: if you carry a doedic with a flyer and either hold it above a rock or drop it onto a rock, it will swing by itself and collect the stone, only one person needed for this) put this into a mortar and pestle, and you’ll get a full stack of 5,000 cementing paste. However, if you put the same amount of chitin and stone in a chem bench, you’ll get 7,500 cementing paste, as chem benches give you 50% more materials than a mortar and pestle.
Look for beaver dams, you will get much cementing paste, run instantly bcz than beavers will agro on you, or keep a bed their and after looting got killed by them and than respawn at the place at collect you material