Water Repellent for Nylon: Choosing and Applying the Right Finish

A water repellent for nylon is one of the easier finishes to get right: nylon takes a durable water repellent well and holds a high spray rating, which is why it is the go-to face fabric for outerwear, packs and technical gear. The main decisions are the chemistry — fluorine-free C0 versus C6 — and getting the cure right so the finish lasts. This guide covers choosing and applying a water repellent for nylon.

For the fundamentals, see our durable water repellent overview and C6 vs C0 water repellents.

Why nylon takes a water repellent well

Nylon is a smooth, synthetic filament fibre with a low, uniform surface, so a DWR finish sits evenly on it and water beads cleanly. That makes nylon one of the best substrates for reaching a high, consistent spray rating — one reason it dominates lightweight outerwear, umbrellas and pack fabrics.

C0 or C6 for nylon?

For most nylon apparel and gear, a fluorine-free C0 finish repels water beautifully and keeps the fabric PFAS-free. Choose a C6 only if the product genuinely needs to shed oil and stains as well — see C6 vs C0. For outdoor and apparel nylon, C0 is usually the right call.

Application and cure

Nylon is normally finished by pad-dry-cure: pad the repellent with a crosslinker, dry, then cure. One caution — nylon 6 has a lower melting point than nylon 6,6, so keep the cure temperature within the fabric’s tolerance to avoid heat damage or yellowing. The grade’s TDS will state a safe cure window.

Getting a durable, high spray rating

A high initial spray rating is easy on nylon; durability is what takes care. Use the recommended crosslinker, cure fully, and start from clean, scoured fabric with no residual surfactant. Done right, a nylon DWR holds a strong rating through many washes — see wash-durable water repellency and water repellency ratings.

Where nylon water repellents are used

• Outerwear: shells, windbreakers and linings.
• Outdoor gear: tents, packs and umbrellas — see water repellent for outdoor gear.
• Technical fabrics: where a clean, high spray rating matters.

Get a nylon grade

DWR Factory supplies water repellents for nylon in C0 and C6, water- and solvent-based, with OEKO-TEX-compliant options and a TDS per grade. Tell us your fabric and target spray rating and we will recommend one: request a free sample or browse the range.

Frequently asked questions

What is the best water repellent for nylon?

For most nylon, a fluorine-free C0 finish gives a high spray rating and keeps it PFAS-free. Use C6 only if you also need oil repellency.

How do you make nylon water repellent?

Apply a DWR by pad-dry-cure — pad with a crosslinker, dry, then cure — keeping the temperature within nylon’s heat tolerance.

What spray rating can nylon reach?

Nylon reaches a high spray rating easily, often 90 to 100 initial, because its smooth surface beads water cleanly.

Does a water repellent for nylon last through washing?

Yes. With a crosslinker and a proper cure a nylon finish holds up for many wash cycles.

Can a nylon water repellent be PFAS-free?

Yes. A fluorine-free C0 grade gives full water repellency on nylon with no PFAS.