# Make Fabric Resist Water

Part of the Textile Merit Badge Digital Resource Guide: [Introduction & Overview](https://merit-badge.university/merit-badges/textile/guide/index.md)

*3. Choose Two Textile Projects*

> **3f.** Waterproof a fabric.

Outdoor gear works only if the fabric helps keep water where it belongs. This project helps you think about finishing, not just fiber content. A fabric may start out absorbent, but a finish or coating can change how water behaves on the surface.

## Waterproof vs. Water-Resistant

These terms are close, but not identical.

- **Water-resistant** fabric slows water down or sheds light moisture.
- **Waterproof** fabric blocks water from passing through much more completely, often by closing pores or using coatings, membranes, or sealed seams.

For this requirement, be ready to explain what method you used and how well it worked.

Video: [A Simple DIY Way to Waterproof Anything (video)](https://youtu.be/y83uXupu5tY)

Video: [DIY Seam Seal (video)](https://youtu.be/UlHfbltn6hI)

These resources are useful because they show that seams and stitch holes can matter just as much as the fabric itself.

## Ways You Might Approach the Project

You might use a commercial waterproofing spray or treatment, wax a fabric such as canvas, or seal seams on a textile item. Whatever you choose, test the result instead of assuming it worked.

## How to Test Your Result

**Simple Waterproofing Test** — Show that your project changed the fabric's performance

- [ ] Start with a dry sample and observe how untreated fabric behaves with a few drops of water.
- [ ] Apply your waterproofing method according to directions.
- [ ] Let the sample cure or dry fully.
- [ ] Add water again and compare beading, absorption, and leakage.
- [ ] Record what improved and what did not.

> **Safety First!**
>
> Some sprays, sealers, or wax products give off fumes or require heat. Use them only with adult supervision, follow the label exactly, and work in a well-ventilated area away from flames.

## What to Explain to Your Counselor

A strong explanation includes:

- what fabric you treated
- what waterproofing method you used
- whether you treated only the fabric or also the seams
- how you tested the result
- whether the fabric became stiffer, darker, less breathable, or more effective

> **Tip**
>
> Choose a fabric small enough to test safely and repeatedly. A scrap of canvas or nylon is easier to evaluate than trying to treat a whole large item on your first attempt.

![Comparison of treated fabric beading water and untreated fabric absorbing water droplets](https://ik.imagekit.io/doulacoop/tr:w-800/mbu-assets/merit-badges/textile/guide/waterproofing-water-bead-test?v=c134d9b8)

Waterproofing is about how a textile performs after finishing. The next option focuses on identifying what a fiber actually is.

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- Previous: [Dye Fabric with Natural Color](https://merit-badge.university/merit-badges/textile/guide/req3e/index.md)
- Next: [Identify Fibers](https://merit-badge.university/merit-badges/textile/guide/req3g/index.md)