On durable cement (vajralepa-lakṣaṇa) - Verse 7

Form a mixture of the horns of the cow, the buffalo, and the goat reduced to powder, the hair of the ass. the skin of the buffalo, the mild of the cow and the juice of the Nimba and the Kapittha trees; throw the mixture in a jar of water and heat it, the resulting kalka is also an excellent animal cement.