'All the mould and green build-up are gone from our tent. Your products are the best!' - (REVIEW) Jos and Renate Kouwenberg

'All the mould and green build-up are gone from our tent. Your products are the best!' - (REVIEW) Jos and Renate Kouwenberg

Does this sound familiar?

  • ... your tent leaking at the seams
  • ... many deeply set stains on the fabric
  • ... ugly rain streaks on the tent awning
  • ... dirty stains from resin and bird droppings

Tent cleaning impregnation

No problem!

Make your tent nice and clean again in 3 simple steps!

  • in steps 1 and 2 you can remove all the grime from the tent canvas
  • in step 3, you make the fabric perfectly waterproof again. You give it extra protection against grime, mould and algae

How does it actually work?

These are the basics.


First clean the tent canvas with SPRAYHOOD & TENT SHAMPOO to remove all the grime 

Sprayhood & Tent Shampoo

  • First clean the tent canvas with lukewarm water. Use a soft, sturdy brush.
  • Spray Sprayhood & Tent Shampoo on the wet fabric. Use a plant sprayer to distribute it well. Use the brush to loosen the grime.
  • Allow the shampoo to soak in for around 20 minutes.
  • Remove the shampoo and grime with a brush and plenty of water by rinsing and brushing. Rinse thoroughly.
  • Now allow the fabric to dry a little.
  • Is grime still visible? Then continue cleaning with Power Cleaner. See step 2.



Remove all stains and heavy grime with POWER CLEANER.

 Power Cleaner

  • Spray Power Cleaner on your dry tent. Use the spray or plant sprayer again. Then rub in with a soft brush.
  • Allow to soak in for approximately 1 hour. Can't see any change? Spray extra Power Cleaner, brush and again allow to soak in. Repeat these steps until the stains are gone. This can sometimes take a few hours.
  • Rinse well afterwards.
  • Now allow the boat cover to dry well.



Protect the tent canvas and make it waterproof with SPRAYHOOD & TENT PROTECTOR or CANVAS & COTTON PROTECTOR.

Sprayhood & Tent ProtectorCanvas & Cotton Protector


  • Is the tent canvas made of cotton or cotton/polyester? Use Canvas & Cotton Protector (This fabric is often used for trailer tents, safari tents, group tents, tipitent)
  • Is the tent canvas made of woven synthetic? Use Sprayhood & Tent Protector. (This fabric is often used for awnings, caravan awnings, bungalow tents.)
  • Spray the impregnating agent generously and evenly on the dry tent canvas. Use a plant sprayer. Also use on the inside of the roof! This gives you better protection against mould and weather stains on the inside.
  • Do not allow impregnating agent to dry on windows or varnish etc., but remove immediately with a damp cloth.
  • Allow the canvas to dry well. Repeat the treatment as needed.
  • Are there still some drops of impregnating agent left on the windows? Simply remove with a little white spirits.
  • Then shine the windows with Ultramar Sprayhood & Tent Shampoo.


Guaranteed results

At Ultramar, we specialise in cleaning and waterproofing tents. Every year we treat more than 2000 boat caps, parasols and tents in this way. Since 1998!

  • We use all the products ourselves to treat tents professionally.
  • products are ready to use, so they can be used immediately.
  • Step-by-step plan and products have been developed with more than 20 years of practical experience.
  • Recommended for years by well-known tent makers, fabric manufacturers and campers like you!


Why precisely should you always clean and impregnate in 3 steps?

The grime on your tent never consists of just 1 type of grime. It is sand, soot from exhaust gases, tree resin, insect and bird droppings, salt, limescale etc. You can never properly remove that with just 1 product. Therefore, always clean in 2 steps. You can thus be sure that the tent canvas is perfectly clean. The impregnating agent then attaches much better to the canvas. And that in turn ensures that your tent stays clean and watertight for much longer.


How much do you need?

It is of course difficult to say exactly how much cleaning agent and impregnating agent you need. It always depends on the condition of the tent canvas, the size of the tent and how much grime is on it. Read more examples for tent awning


We receive these questions on a daily basis.

  • QUESTION: Do I also have to impregnate the tent on the inside?

    ANSWER: Yes, the inside of the tent must also be impregnated. The tent canvas on the inside is in fact very vulnerable and susceptible to fungi and the familiar weather stains.
  • QUESTION: How often do I have to impregnate my tent?

    ANSWER: We recommend impregnating a tent immediately after purchase. This way, the original coating gets a protective layer. After that, it is sufficient to impregnate the tent once or twice a year. In this way the tent canvas remains well protected.
  • QUESTION: How can I make the seams of my tent waterproof?

    ANSWER: You can easily fill the holes in the stitching by spraying the seams a number of times in succession with the impregnating agent.  
  • QUESTION: Do I have to dilute the shampoo and impregnating agent?

    ANSWER: No, our products are ready to use. In this way, you can be sure that they will work perfectly.  
  • QUESTION: Can it get on the transparent windows of my tent?

    ANSWER: It is not harmful if the shampoo, the Power Cleaner or the impregnating agent gets on the window film. Can you see dried drops of impregnating agent on the windows after impregnation? You can simply remove these with a cloth and a little white spirits.  
  • QUESTION: How can I impregnate a large tent awning?

    ANSWER: You can apply our impregnating agents with a plant sprayer. A pressure sprayer is easy for large surfaces. This allows you to spray evenly.

    If the awning is very large or high, you can do the following:
    • Attach the awning to the caravan by sliding the string into the rails
    • Now allow the tent to hang
    • Spray all parts of the tent with the impregnating agent
    • Now place part of the frame (or the entire frame) under the tent
    • Make sure that all parts are off the ground and can dry well


This is what others say about us! and we are proud of that!

Reviews tent

Want to order and receive Ultramar products easily at home?

  • Delivery time 1 to 2 business days
  • Free shipping for orders above 50.00
  • Take delivery at home or pick up at a parcel shop nearby.
  • Pay later? That is also possible with Ultramar!


  • Outdoor Gear Protector

    The Outdoor Gear Protector makes your gear perfectly water and dirt repellent. It's ideal for motorcycle gear, backpacks, shoes, outdoor jackets, sailing suits, ski pants, etc. Your gear will be waterproof, but still breathable. Dries colourless and doesn

    -20% Sale

    98,99 78,99

  • Sprayhood & Tent Protector

    Sprayhood & Tent Protector is a very strong impregnating agent for your awning, boat cover or convertible top. It makes the fabric waterproof and provides added protection against any type of dirt. Does not need to be diluted. Dries colourless. Provides l

    -20% Sale

    68,99 54,99

  • Canvas & Cotton Protector

    Canvas & Cotton Protector 5L is a very strong impregnating agent for cotton and canvas. Makes cotton tent cloth waterproof and dirt-repellent. Do not dilute. Easy to apply with plant sprayer. Perfect for a safari tent, teepee or folding tent trailer.


  • Sprayhood & Tent Shampoo

    Sprayhood & Tent Shampoo is a strong fabric cleaner. It cleans your tent, boat cover or convertible top safely and thoroughly. Does not need to be diluted. Suitable for any outdoor fabric. For regular maintenance. For very soiled fabric use in combination

    -21% Sale

    56,99 44,99

  • Plastic Window Cleaner & Protector

    Plastic Window Cleaner & Protector cleans and protects transparent plastic. (transparant screen, display, visor, Plexiglas) In 1 quick simple treatment. Removes dirt, cleans perfectly and repels. Prevents fingerprints.


  • Power Cleaner

    Ultramar Power Cleaner is a super-strong fabric cleaner. For when nothing else helps. Removes heavy contamination and deeply absorbed stains from your boat cover, tent or convertible top. For best results, always clean first with Sprayhood & Tent Shampoo.


  • Premium Ultramar 1L Spray

    Premium Ultramar 1L Spray: with this sprayer, it is very easy to properly distribute cleaning or impregnating agent over large pieces of cloth.


  • Tent Canvas Brush - Extra Soft - Long Handle

    Special brush for your hood, tent, or convertible top. Features soft split fibres. Rubber edge prevents scratching. The ergonomic handle is perfect for heavy-duty scrubbing or those places that are difficult to reach. Extremely durable.


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Ultramar Products 8,8 / 10 - 2355 Reviews @ Feedback Company
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