---
title: "Can you mix water-based paint and oil-based paint underneath?"
description: "Water-based paint and oil-based paint underneath: no — it damages something or fails. What actually happens, and what to do instead."
url: https://atoneplace.net/can-you-mix/latex-over-oil-paint/
site: "At One Place"
---

# Can you mix water-based paint and oil-based paint underneath?

**Water-based paint and Oil-based paint underneath: No — it damages something or fails**

Not directly. It will look fine and peel off in sheets later.

## What actually happens

Emulsion has almost no adhesion to a cured oil-based gloss, because the old surface is hard, slick and non-porous. The new coat dries, looks perfect, and then lifts in sheets months later, usually taking a fingernail to start it. Oil over water-based is far less troublesome and is generally acceptable on a sound, keyed surface.

## What to do instead

Abrade the gloss to a dull finish and use a bonding primer. Skipping the primer is what causes the failure, not the paint choice.

## Paint, glue and materials

| Combination | Verdict | Why |
| --- | --- | --- |
| Superglue and baking soda | Fine | Yes, and it is a genuinely useful trick — but it gets hot. |
| Expanding foam and water | Fine | Yes — polyurethane foam needs moisture to cure, and misting the gap helps. |
| PLA filament and abs filament | Do not | They will not bond to each other, and they want different temperatures. |

## Common questions

### Can you mix water-based paint and oil-based paint underneath?

No — it damages something or fails. Not directly. It will look fine and peel off in sheets later.

### What happens if you do?

Emulsion has almost no adhesion to a cured oil-based gloss, because the old surface is hard, slick and non-porous. The new coat dries, looks perfect, and then lifts in sheets months later, usually taking a fingernail to start it. Oil over water-based is far less troublesome and is generally acceptable on a sound, keyed surface.

### What should I do instead?

Abrade the gloss to a dull finish and use a bonding primer. Skipping the primer is what causes the failure, not the paint choice.

## Related pages

- [Superglue and baking soda](https://atoneplace.net/can-you-mix/superglue-and-baking-soda/)
- [Expanding foam and water](https://atoneplace.net/can-you-mix/expanding-foam-and-water/)
- [PLA filament and abs filament](https://atoneplace.net/can-you-mix/pla-and-abs-printing/)
- [Bleach and ammonia](https://atoneplace.net/can-you-mix/bleach-and-ammonia/)
- [Bleach and vinegar](https://atoneplace.net/can-you-mix/bleach-and-vinegar/)
- [Bleach and toilet cleaner](https://atoneplace.net/can-you-mix/bleach-and-toilet-cleaner/)
- [Bleach and rubbing alcohol](https://atoneplace.net/can-you-mix/bleach-and-rubbing-alcohol/)
- [Hazard symbols](https://atoneplace.net/symbol/)

## Sources

- Official vendor product documentation — At One Place (/about/)