Lube is absolutely essential for anal sex, but many anal-specific lubricants use oils and other ingredients that can degrade latex condoms. The safest of all lubricants is the cheapest as well, water-based lube.
Pjur Back Door Comfort is a water and glycerin-based lubricant, so it's safe to use with all types of condoms and sex toys, and it's designed for safe, fun anal play. It uses hyaluronic acid, a natural ingredient that purportedly allows for improved lubrication. The thick consistency stays in place during longer sessions, so you won't need to keep stopping to re-apply.
Back Door Comfort is mostly tasteless and odorless, so it's ideal for discreet fun. It lasts a long time for a water-based lubricant and will not become greasy or sticky. The simple formula doesn't use any parabens and contains a limited number of artificial preservatives. Cleanup is easy with a little bit of soap and warm water.
If you're looking for a great anal lubricant that doesn't use an oil or silicone base, Pjur's Back Door Comfort is an excellent option.
Aqua (Water) Glycerin, Xanthan Gum, Sodium, Sodium Hyaluronate, Benzyl Alcohol, Sodium Benzoate, Potassium Sorbate, Citric Acid