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Maintain your boat cover: cleaning, stain removal and protection

Ultramar helps you maintain your boat cover and other outdoor fabrics yourself. With our PFAS-free maintenance products, you can clean the fabric, tackle stubborn contamination and restore its water-repellent properties.

A boat cover is exposed to weather, water and dirt throughout the season. Regular maintenance helps keep the material looking good and working as it should.

On this page, you’ll see step by step how to maintain your boat cover using the proven Ultramar maintenance process.


 

 

Done in 3 steps

Step 1

Clean your boat cover

Ultramar Sprayhood & Tent Shampoo removes everyday dirt from your boat cover.

Preparation
Rinse the fabric with lukewarm water and use a soft brush. This removes loose dirt and prepares the surface.

Cleaning
Apply the shampoo to the wet fabric and gently brush the surface. A spray bottle or plant sprayer works well for even application.

Allow to work
Let the shampoo sit for approximately 20 minutes. Make sure the fabric does not dry during this time.

Rinse thoroughly
Brush again and rinse with plenty of clean water to remove dirt and product residue.

Drying
Allow the boat cover to dry completely before moving to the next step.

See product

Step 2

Use for stubborn stains

Ultramar Power Cleaner is designed for ingrained or persistent stains that remain after cleaning.

Apply to dry fabric
Use the product on dry material and work it in with a firm but soft brush.

Allow to penetrate
Leave it to soak for about one hour. If necessary, apply additional product and repeat the process.

Repeat if needed
For heavier staining, the treatment can be repeated until the stain is visibly reduced.

Rinse and dry
Rinse thoroughly and allow the fabric to dry before continuing.

See product

Step 3

Reproof your boat cover

Ultramar Sprayhood & Tent Protector restores the fabric’s water-repellent properties and helps reduce future dirt adhesion.

Clean and dry surface
Make sure the boat cover is clean and completely dry before application.

Apply evenly
Spray generously and evenly until the fabric is well saturated.

Distribute carefully
Ensure even coverage across the entire surface.

Avoid windows
Remove any product from clear windows immediately with a damp cloth.

Dry completely
Allow the boat cover to dry fully before use.

See product

Prefer everything in one go?

Ultramar works with a clear three-step maintenance process: clean, treat stains if necessary and protect.

Our maintenance bundles combine the right products and are often more cost-effective than buying separately.

With a bundle, you have enough product for a complete treatment and often some left for future maintenance.

View bundles

Let customers speak for us

from 3998 reviews

Uitstekend, ik had een defecte spuitbus ontvangen, maar is professioneel opgelost.

Henk Guliker
UltramarXL

Goed product, gemakkelijk gevonden wat ik zocht. Vlot geleverd.

Lucas De Raedt
UltramarXL
Prima! Product doet wat t beloofd heeft.

Prima! Product doet wat t beloofd heeft.

Dennis Gunther
UltramarXL

Producten worden snel geleverd, en regelmatig een mail met tips voor het onderhoud.

Dick
UltramarXL

Professioneel bedrijf met een uitstekende service!
Beschadigde bestelling binnengekregen.
1 bericht met uitleg en foto gestuurd.
Dezelfde dag nog een nieuw pakket verstuurd en de volgende dag in goede staat ontvangen.

John van Kampen
UltramarXL

Produit prêt à l'emploi, pas besoin de le diluer, il suffit de fixer un vaporisateur sur le goulot. Avec 1 litre j'ai pu passer 2 couches sur une toile de tente 2 places. Très facile d'utilisation; j'attend qu'il pleuve pour pouvoir juger de l'efficacité. J'ai arrosé ma tente et ça a l'air nickel .

Thierry MAGAND
UltramarXL
Good service and good communication.

Good service and good communication. Waterproofing product did leave a white residue on my tent but I was assured this would go in time. Tested waterproof by using hose and seems to have done the job.

David McKinlay
UltramarXL
Great service

Great service. One item was lost in delivery. Ultramar sent a replacement immediately.

Vagn Borlund
UltramarXL
Super zufrieden

Bis jetzt super zufrieden mit dem Produkt. Viele andere ausprobiert,das erste was hält was es verspricht.

Marcus Wallmann
UltramarXL
Imperméabilisation d’une protection de grande voile très réussie.

Imperméabilisation d’une protection de grande voile très réussie.

Philippe Bonnaire
UltramarXL
Top

Top, netjes geleverd. Voldoet aan verwachting

Erwin Van Der Meij
UltramarXL

Bis jetzt super zufrieden mit dem Produkt. Viele andere ausprobiert,das erste was hält was es verspricht.

Jenn Hendriks
UltramarXL
Keine Vorkommnisse Seitens des Verkäufers

Keine Vorkommnisse Seitens des Verkäufers
Stärken
Recht schnelle Antwort auf Anfrage

Verbesserungsvorschläge oder Tipps
Im Bestellvorgang könnte auf lange Lieferzeit seitens PostNL hingewiesen werden, es dauerte eine komplette Woche bis das Paket von den Niederlanden nach Deutschland kam. Preis Leistung vom Imprägniermittel unverhältnismäßig, 500 ML Ultramar reichen meiner Meinung für 2 große Jacken was dann 27€ kostet

Anonym
UltramarXL

Frequently Asked Questions

Do I need to reproof my boat cover after cleaning?

Yes. Cleaning removes dirt but also reduces the protective layer. Reproofing restores water repellency and helps prevent future contamination.

When should I use Power Cleaner?

Only if stains remain visible after regular cleaning. It is not required for routine maintenance.

How often should I maintain my boat cover?

In most cases, one thorough treatment per season is sufficient. Frequency depends on use and exposure.

Are Ultramar products suitable for all boat covers?

They are suitable for most synthetic fabrics such as polyester and acrylic. For natural fabrics like cotton or canvas, use the appropriate protector.

What if water no longer beads on the surface?

If water stops beading, the protective layer has diminished. Clean the fabric and reapply protection.

View all questions