Change Your Hydro Flask Color

Simple, step-by-step directions on how to paint a Hydro Flask or other vacuumed sealed metal container.

Materials

You'll just need a few simple to find items for this project:

Water container / item to be painted.

Sandpaper (120 grit works well, up to 220 should be fine).

Spray paint (color coat).

Spray paint (clear coat).

Masking tape.

Step 1: Sand It

The first thing with any painting job is preparation. In this case we need to prepare the surface of the container to accept new paint. Using some 120 grit sandpaper, lightly sand the surface of the flask that will be painted. It won't take much but wear a mask when you do this so you're not breathing in the dust.

Step 2: Clean It

Using a damp paper towel, wipe the entire surface of the container down. We need to get all of the sanding dust off it and create a clean surface for the paint to stick to.

Step 3: Tape It

Tape off any areas of the flask that shouldn't be painted, which is usually the top where the cap screws on. Once taped off, give it one last wipe down with the damp paper towel. Avoid touching the outside once it is clean as oils from your hands can cause the paint to not stick as well.

Step 4: Paint It

You'll need a place to do the spray painting. A large, old box will work in a pinch but if you plan to paint other items consider making a spray booth. They're easy and cheap to make, see How To Make A Spray Paint Booth for directions. Always paint in a well ventilated area.

Stand the flask upside down and begin painting the sides in short, left / right strokes. Don't spray on too much or the paint will run. Spray on a light coat, turning it carefully at the top as you go. Once the sides are done, spray the bottom of the flask (which is at the top right now). Wait 30 minutes or whatever your spray paint directions say and put on a second coat the same way.

If you want to clear coat it as well, which will give it another layer of protection, you can do that as well once you're waited the proper amount of time per the directions on your paint and clear coat cans.

Step 5: Let It Dry

Don't rush this part. Give the flask plenty of time to fully dry before taking it out of your spray booth. Once it is dry enough to remove and handle, you can remove the tape carefully. Now let the flask dry (upside down still) for another 48 hours before using it.