'With your products and explanation, my boat cover is super clean and waterproof again.' - (REVIEW) R. Lancer

'With your products and explanation, my boat cover is super clean and waterproof again.' - (REVIEW) R. Lancer

Does this sound familiar?

  • ... boat cover leaking at the seams
  • ... dirty deeply set stains on the fabric
  • … ugly rain streaks on the side
  • ... dirty stains from bird droppings and insects

Boot Cover Cleaning Impregnation

No problem!

Make your boat cover perfectly clean and waterproof again in 3 simple steps!

  • in steps 1 and 2 you can easily remove all the grime from your boat cover
  • in step 3 you can make the fabric perfectly waterproof again and provide it with extra protection against grime, mould and algae.

How does it actually work?

These are the basics.


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

Sprayhood & Tent Shampoo

  • First clean with lukewarm water. Use a soft, sturdy brush.
  • Apply Sprayhood & Tent Shampoo to 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 approximately 20 minutes.
  • Remove the shampoo and grime with the brush and plenty of water by rinsing and brushing. Rinse thoroughly.
  • 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

  • Apply Power Cleaner to dry boat cover. 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 fabric and make it waterproof with SPRAYHOOD & TENT PROTECTOR.

Sprayhood & Tent Protector

  • Apply Sprayhood & Tent Protector generously and evenly. 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 Sprayhood & Tent Protector to dry on windows or varnish etc., but immediately remove with a damp cloth.
  • Allow the roof 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 clean and impregnate more than 2000 boat covers, parasols and tents in this way each year. Since 1998!

  • We use all the products ourselves for treating boat covers 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 sailmakers, fabric manufacturers and water sports enthusiasts like you.

Why always clean and impregnate in 3 steps?

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

How much do you need?

It is difficult to say exactly how much product you need. It always depends on the condition of the fabric, the size of the boat cover and how much grime is on it.


We receive these questions on a daily basis.

  • QUESTION: Do I also have to impregnate the inside of my boat cover?

    ANSWER: Yes, the inside of the tent must also be impregnated. The coating on the inside is actually very delicate. With many boat covers, the coating on the inside of the fabric ensures watertightness. This coating is very susceptible to mould and weather stains.  

  • QUESTION: How often do I have to impregnate my boat cover?

    ANSWER: We recommend impregnating a boat cover immediately after purchase. This way, the coating gets a protective layer. After that, it is sufficient to impregnate the boat cover once or twice a year. In this way, the boat cover remains well protected.

  • QUESTION: How can I make the seams waterproof?

    ANSWER: Sprayhood & Tent Protector is very suitable for waterproofing the seams. Due to the large number of active substances, it is effective with poor stitching. You can fill in the holes by spraying the seams a number of times in succession.

  • 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 boat cover?

    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.


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

boat cover reviews


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!


  • 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.


  • 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


  • 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


  • 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.


  • 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.


  • 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.


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