'Really great! The sail is 20 years old, and I can't remember it having been so clean.' - (REVIEW) Michel

'Really great! The sail is 20 years old, and I can't remember it having been so clean.' - (REVIEW) Michel

Does this sound familiar?

  • ... stains from mosquitoes in the headsail
  • ... many deeply set stains
  • ... rust spots in the sailcloth
  • ... sailcloth stays wet longer than before

Coating and cleaning sails

No problem!

Make your sails beautifully clean again and give them strong protection in 3 simple steps!

  1. in steps 1 and 2 you can remove all the grime from the sailcloth
  2. In step 3, you give the sailcloth perfect extra protection against grime, mould and algae.

How does it actually work?

These are the basics.


First, clean the sailcloth with SAIL CLEANER to remove all the grime

Sail Cleaner

  • Fill a container, wheelie bin, bath or rain barrel with lukewarm water (30 degrees Celsius).
  • Add 30 grams (1 scoop) per 1 litre of lukewarm water and mix.
  • Fold or roll the sail.
  • Allow the sail to be submerged for at least 24 hours.
  • Remove detached grime and the sail cleaner with a soft brush and plenty of water.
  • If necessary, soak for several days and repeat the treatment. You can use the bath multiple times. Just throw a bucket of warm water in the bath. Roll the sail up again and let it soak again overnight.

Note: Ultramar Sail Cleaner is not suitable for spinnaker cloth. It is possible that coloured sails, UV strips or telltales will not be colour-fast. First try this on a small piece of cloth.



Remove all stains and heavy grime with POWER CLEANER.

Power Cleaner

  • Spray Power Cleaner on sailcloth. Use a spray or plant sprayer. 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.
  • Let the sail dry well.

Remove rust stains with RUST REMOVER.

Rust Remover

  • Apply the rust remover generously and evenly with a spray or brush.
  • Brush in well and allow to soak in for approximately 1 hour.
  • Can't see any change? Re-apply and brush in. Again allow to soak in. Repeat this until the rust spots have disappeared from the sail. This can sometimes take a few hours.
  • Rinse well with plenty of water and a brush.

Remove adhesive residue with SAIL NUMBER REMOVER

Sail Number Remover

  • Remove adhesive letters from the sailcloth. If necessary, first spray with Sail Number Remover and allow to soak in for ten minutes.
  • Spray glue residue and brush in.
  • Allow Sail Number Remover to soak in for 15 minutes.
  • Remove adhesive residues with water and a brush, sponge or cloth.
  • If necessary, repeat several times until all adhesive residue has disappeared.
  • Thoroughly clean the sailcloth with water.
  • Allow the sailcloth to dry before you apply new numbers.



Protect the sailcloth and make it super water and grime resistant with SAIL & SPINNAKER COATING

Sail & Spinnaker Coating

  • Make sure the sailcloth is clean and dry before treatment.
  • Apply Ultramar Sail & Spinnaker Coating evenly on the cloth. From left to right and from top to bottom. A thin layer is sufficient.
  • Use a spray or paint roller for this.
  • Wait until the sail is dry (approximately 10 minutes). Then treat the other side of the sailcloth.
  • Allow the sailcloth to dry thoroughly.

TIP: You can even coat the mainsail on board. Use a paint roller. Apply the coating on both sides of the sailcloth. Raise the sail a little. Repeat these steps until the sail is completely raised.


Guaranteed results

At Ultramar, we specialise in cleaning and coating sails. Every year we treat over 2000 Dacron and laminate yacht sails and spinnakers in this way. Since 1998!

  1. We use all the products ourselves to treat sails professionally.
  2. products are ready to use, so they can be used immediately.
  3. Step-by-step plan and products have been developed with more than 20 years of practical experience.
  4. Recommended for years by sailmakers, fabric manufacturers and water sports enthusiasts like you!


Why always clean and coat in 3 steps?

The grime on your sails never consists of just 1 type of grime. It is sand, soot from exhaust gases, spider droppings, mosquito blood, 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 sailcloth is perfectly clean. The coating then attaches much better to the fabric. And that in turn ensures that your sails are clean and protected for much longer.


How much do you need?

It is of course difficult to say exactly how much cleaning agent and coating you need. This always depends on the condition of the sailcloth, the size of the sails and how much grime is on it. Let's look at an example.

Required Dacron sail with rust spots 10m2


We receive these questions on a daily basis.

  • QUESTION: Why does mould get into my laminate sail?

    New sailcloth is treated with a protective coating. The sailmaker puts little holes in the sailcloth when sewing the sail. Moisture enters the laminate through those holes. The result: mould between the laminate. So give a new sail an extra coating immediately. This way you seal the entire sail, and the risk of mould in your expensive laminate sail is considerably smaller.

  • QUESTION: How long does the Sail & Spinnaker Coating protect?

    Experience has shown that many sails treated with our coating still have good protection after 3 years. If necessary, you can always apply an extra coating locally. For example on a clew.
  • QUESTION: Do I have to clean my sail before coating?

    Yes, that is best. Otherwise, the grime gets sealed in. Salt, grime etc. can also cause the coating to attach less well. So at least clean your sail with clean water.
  • QUESTION: Why should I coat a spinnaker?

    : The coating makes an old spinnaker super repellent. But also more airtight and more stable. The spinnaker is much quicker and stays perfectly dry.


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

Reviews sails


Want to order and receive Ultramar products easily at home?

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


  • 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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