I sent an e-mail this morning to one of the owners of Saphir and Tarrago brands. We are friends.
Here is what he wrote back:
Saphir Renovateur 75 ml. is a water based product, which is non oily and contains mink oil and lanolin.
Saphir Nappa Renovateur 75 ml., which is another formula, contains jojoba oil and wheat proteins, water based also. For very very delicate leathers, like nappa.
So NO turpentine! You can post that , for sure.