Written by Nicole

How do I waterproof my hiking backpack?

Many backpacks and backpacks have DWR, or a durable water-repellent coating. Handy, because such a coating ensures that your backpack or backpack and especially its contents is protected. This protective layer is affected by UV radiation. It not only ensures that your bag is less water-repellent, but it also affects the elasticity of the fabric. This allows the bag to tear over time. Here you can read tips to prevent that.

When, what and how?

Make the bag water-resistant

When do you make your bag water repellent?

To make your backpack water-repellent, also known as impregnation, it must have a pu coating on the inside. This coating in combination with DWR provides the water-repellent function.

Does your backpack or backpack not have a pu coating? Then it makes no sense to impregnate it. Check the specifications of your backpack if it has a pu coating.

Great, your bag does have a pu coating! Then it is wise to impregnate it, but only if:

  • You just washed the backpack or backpack.
  • The product is older than 1 year.
  • Your backpack is exposed to the sun for a continuous period of 14 days.
What do you need

What do you need?

There are various impregnating agents to make your bag water-repellent. Note: you should never expect a bag like this to be 100% waterproof. But if properly applied, certain impregnating agents certainly provide good protection. It is important that you ensure that your backpack is clean before you impregnate it.

There are many different types of impregnating agents. These are my recommendations:

  • The impregnation agents from the Nikwax brand. Nikwax focuses specifically on outdoor related items and is also environmentally friendly.
  • Sime sealer impregnant from Stimex. Seam Sealer ensures that the seams of your backpack are extra protected. This is because most of the water enters through the seams, so extra protection at that location is important.
How do you proceed

How do you do this?

  • Make sure the backpack or backpack is completely clean and dry.
  • Ideally, you work outside. Is this not possible? Then choose a space close to a window. After all, you work with a chemical agent.
  • Put your backpack on a garbage bag to protect the surface from the spray.
  • Spray the backpack or backpack with the impregnating agent. Hold the spray can about 20 centimeters from the surface and spray in even layers.
  • Let the spray dry. The label states how long this takes.
  • After you have impregnated the bag and let it dry, you can rub the seams with the seam sealer for some extra protection. Don't forget to grease the seams on the zippers.
  • Let your backpack dry for at least 24 hours.


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