HomeBlogBlogIs Nylon Waterproof? Coatings, DWR & What to Check

Is Nylon Waterproof? Coatings, DWR & What to Check

Can nylon be waterproof?

Nylon can be waterproof, but not all nylon starts out that way. In its basic form, nylon fibers don’t absorb much water, and the fabric can shed light moisture for a short time. However, most standard nylon is better described as “water-resistant” until it’s engineered or treated to block water under pressure.

What “waterproof nylon” really means

When a product is labeled waterproof, it typically relies on more than the nylon yarn itself. Manufacturers use tight weaves, coatings, laminations, and sealed construction to keep water from passing through. If rain beads up and rolls off but eventually seeps through during a downpour, that’s usually water-resistant nylon. If it stays dry even when water sits on it or hits it hard, it’s closer to truly waterproof.

How nylon is made waterproof

Several common methods can turn nylon into a more reliable barrier:

Coatings: Polyurethane (PU) coatings or similar finishes are applied to the inside of the fabric to block water. The heavier the coating, the more waterproof it tends to be, though breathability can decrease.

Laminates/membranes: A waterproof membrane can be bonded to nylon, improving water protection while sometimes preserving breathability.

DWR finishes: Durable Water Repellent treatments help the face fabric resist wetting out (so it doesn’t get saturated), but DWR alone rarely makes a fabric fully waterproof.

What to look for when shopping

If staying dry is the priority, check for details beyond the word “nylon.” Look for terms like “PU-coated,” “waterproof membrane,” or a waterproof rating, and pay attention to construction features such as taped seams and water-resistant zippers. Also consider how the item will be used: a nylon bag may only need spill resistance, while outdoor gear may require a waterproof build.

For a deeper breakdown of how nylon performs in wet conditions and what treatments matter most, visit this guide on whether nylon can be waterproof.

FAQ

How do you waterproof nylon fabric?

Nylon is commonly waterproofed with a PU coating, a bonded waterproof membrane, or a spray-on DWR finish. For best results, also address seam leakage with seam sealer or taped seams, since needle holes can let water in.