Boudreaux's Butt Paste vs. Aquaphor Baby Healing Ointment

Boudreaux's Butt Paste and Aquaphor Baby Healing Ointment are both found in nearly every nursery — but they are not interchangeable. They take fundamentally different approaches to your baby's skin.

Boudreaux's Butt Paste is a zinc oxide diaper rash cream. Its job is to treat rashes that have already appeared. The zinc oxide creates a thick barrier over irritated skin, dries out excess moisture, and helps the rash heal. You reach for it when your baby's bottom is already red and angry.

Aquaphor Baby Healing Ointment is a petrolatum-based barrier ointment. Its job is to lock moisture in and keep irritants out. You apply it to healthy skin to prevent rashes from forming in the first place — and it doubles as a go-to for dry patches, chapped skin, and minor irritation anywhere on the body.

Think of it this way: Aquaphor is the shield. Butt Paste is the medicine. Most families eventually keep both in the diaper caddy.

This is the most important thing to understand about these two products.

Boudreaux's Butt Paste uses zinc oxide as its active ingredient — 16% in the original formula, 40% in the maximum strength version. Zinc oxide is an astringent and skin protectant. It sits on top of the skin as a thick white layer, physically blocking moisture while drying out the wet, irritated tissue underneath. It is the same ingredient used in many sunscreens and calamine lotion.

Aquaphor Baby Healing Ointment uses petrolatum (41%) as its primary ingredient, along with mineral oil, ceresin, and lanolin alcohol. Petrolatum does not treat anything — it creates a waterproof seal over the skin's surface that prevents moisture loss from inside and blocks irritants (urine, stool) from outside.

In practical terms: if your baby's skin is red and raw, Butt Paste actively helps it heal. If your baby's skin is fine and you want to keep it that way, Aquaphor keeps the protective barrier intact. Using the wrong one at the wrong time is not dangerous, but it is less effective than picking the right tool for the situation.

The simplest way to think about it:

Use Aquaphor at every diaper change as a preventive step. A thin smear after cleaning creates a barrier that keeps wetness away from your baby's skin. This is especially helpful overnight when diapers stay on longer, and during the newborn phase when skin is extra delicate.

Use Boudreaux's Butt Paste when you see redness, irritation, or a rash forming. Apply a generous layer directly over the affected area at each change. The zinc oxide will go to work drying and soothing the skin. For stubborn rashes, the 40% maximum strength formula provides a thicker, more concentrated layer.

Use both together by applying Butt Paste directly to the rash, then sealing it with a thin layer of Aquaphor on top. This gives you the treatment benefit of zinc oxide plus the moisture-blocking power of petrolatum. Some pediatricians recommend this layering approach for persistent rashes.

One thing to keep in mind: if a rash is not improving after 2–3 days of consistent treatment with zinc oxide cream, call your pediatrician. It may be a yeast infection or something else that needs a different approach.

How a product feels in your hands during a 3 AM diaper change matters more than you might think.

Aquaphor is a clear, smooth ointment that glides onto skin with very little effort. You can apply it one-handed. It absorbs into the skin partially and leaves a shiny, translucent layer. It does not stain most fabrics heavily, though it can leave oily spots.

Boudreaux's Butt Paste is a thick, opaque white paste. Spreading it requires a bit more pressure, and it sits visibly on the skin rather than absorbing. It is stickier and harder to remove at the next diaper change — some parents find they need an oil-based wipe or a dab of coconut oil to clean off the residue.

For daily, every-change use, Aquaphor is simply easier to work with. For targeted rash treatment where you want a thick medicated layer to stay in place, Butt Paste's heavier texture is actually an advantage — it clings to the skin and stays put.

Ounce for ounce, Aquaphor is less expensive — especially in the larger 7 oz and 14 oz sizes. At bulk pricing, Aquaphor runs about $1.00–$1.35 per ounce compared to Butt Paste at roughly $1.75–$2.75 per ounce.

But cost comparisons here are a little misleading because you use them differently. Aquaphor goes on thin and covers more area per application. Butt Paste goes on thick, which means you burn through it faster when treating an active rash.

For most families, the monthly spend on either product is modest — somewhere between $5 and $16 per month depending on how often you apply and which sizes you buy. If you are using Aquaphor daily as a preventive and only pulling out Butt Paste for occasional rashes, your total spending stays low.

Ways to save:

• Buy the largest size available — per-ounce cost drops significantly with bigger tubes and tubs
• Subscribe and save on Amazon or Target for 5–15% off recurring orders
• Watch for Aquaphor multi-packs — the on-the-go packets plus a tub bundle is often a good deal
• Store-brand zinc oxide creams work too if Butt Paste's price is a concern

If your baby has an active diaper rash, Boudreaux's Butt Paste (~$8 for 4 oz) is a trusted zinc oxide cream that dries out irritation and helps skin heal fast. The original 16% formula handles most rashes; the maximum strength 40% version is there for stubborn flare-ups. Keep a tube in the diaper caddy for when redness appears.

If you want daily skin protection and a product that does double duty across your baby's whole body, Aquaphor Baby Healing Ointment (~$12 for 7 oz) is hard to beat. A thin layer at every change keeps moisture out and healthy skin intact. It also works on dry patches, chapped lips, minor scrapes, and cradle cap — one product, many uses.

Our honest take: most families benefit from having both. Aquaphor for everyday prevention, Butt Paste for when a rash breaks through. They complement each other well.

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Boudreaux's Butt Paste and Aquaphor Baby Healing Ointment are both excellent products — they just serve different purposes.

Boudreaux's Butt Paste is the better choice when your baby already has a rash. Zinc oxide dries out irritated skin, soothes redness, and creates a thick protective layer while the skin heals. It is a treatment product, and it does that job well.

Aquaphor Baby Healing Ointment is the better choice for daily prevention and general skin care. Petrolatum seals out moisture and irritants before they can cause problems. Its versatility — usable on dry skin, eczema patches, lips, and minor cuts — makes it one of the most useful products in the nursery.

You do not have to pick just one. The smartest approach is keeping both on hand: Aquaphor as your everyday barrier at each diaper change, and Butt Paste as your go-to when redness or a rash shows up.

If you are tracking diaper changes and noting when rashes appear — which is genuinely helpful for spotting triggers like new foods or wipe brands — tinylog makes it simple to log everything and share the patterns with your pediatrician.

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• Boudreauxs.com. "Boudreaux's Butt Paste — Product Information and Ingredients." 2026.
• Aquaphor.com. "Aquaphor Baby Healing Ointment — Product Information." 2026.
• American Academy of Pediatrics. "Diaper Rash." healthychildren.org.
• American Academy of Dermatology. "How to Treat Diaper Rash." aad.org, 2026.
• Cleveland Clinic. "Diaper Rash: Treatment, Causes & Prevention." clevelandclinic.org, 2025.
• Healthline Parenthood. "Best Diaper Rash Creams." healthline.com, 2026.
• BabyCenter. "Diaper Rash Treatments: What Works." babycenter.com, 2026.

This guide is for informational purposes only. Diaper rash cream choice depends on your baby's individual skin needs. If your baby develops a rash that does not improve within a few days, spreads, or appears infected, consult your pediatrician.