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Gelcoat Mould Sanding and Polishing

Man polishing and sanding a mould for yacht production.

Preparing and Finishing Moulds in Boat and Yacht Production

Facing harsh conditions with salt, water and wind, marine surfaces need to be built to last. It all starts with the hull and for that, you need a plug and mould to construct a frame that gives the boat or watercraft its shape and strength.

One of the keys to success in mould construction is proper surface preparation of the plug. Any imperfections on the surface will be transferred to the mould, and then to future parts made from that mould, meaning corrective work and a high standard of finish is more important than ever. In addition, a smoother outer surface on the mould will require less work on the finish.

With Mirka’s net and multihole abrasives, ergonomic sanders and efficient dust extraction, you can work faster and more efficiently while improving work safety.

For a better finish

Mould Gelcoat Sanding and Polishing

Prepare for Success – Why Surfaces Matter When Creating Moulds

Why do you need to have a consistently smooth surface on a mould?

There are two types of moulds, male and female. Male moulds are faster and cheaper to make. Each part produced will have a rough outer texture that will need more work on the finish. Female moulds are often more expensive, but they require less work on the finish because every part gets a smoother outer surface.

Nautor's Swan, Finland

High-Quality Finish

For Finnish yacht builder Nautor, a high-quality finish is about respecting the company’s roots and heritage, and it takes the best kind of power tools and abrasives to accomplish that. Benny Brännbacka from Nautor shares with us what it means to collaborate with Mirka, and how important client satisfaction is when building spectacular yachts with Mirka's solutions.

"Working with Mirka is very good, we are continuously collaborating."


Get in touch to learn more about our marine solutions

Do you want to know more?

Contact Us

Please get in touch and our expert support team will answer your questions.

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Why Choose Mirka?

Save time and money – You can cut costs and reduce working hours

Why Choose Mirka?

Sand and polish safely without strain – Our tools and abrasives are ergonomic, efficient, and easy to use

Why Choose Mirka?

Improve the quality of work – The finish is excellent, with less effort

We offer on-site demonstrations

Request a Demonstration

Boat sanding

Supporting you through technical development

To support this Mirka has a national team of trained staff who have a wealth of industry experience and are able to provide a hands-on approach to support.

Request a demonstration

Save your health, time, and money

Sanding Without Dust

Do you get covered in dust when sanding? Try the benefits of Mirka's pioneering sanding solutions and see how a dust-free working environment can boost your business.

Benefits from dust-free sanding

Healthier working environment - Stop dust from getting into your lungs
Time-saving – No cleaning after sanding and clean abrasives cut better
Money-saving – No clogging lets you sand longer with the same abrasive
High-quality finish - Thanks to a finer scratch pattern 


A better choice for you and the environment

Water-Based Polishes

All polishes that Mirka produces are water-based and produced in Finland. There are many benefits of choosing a water-based polishing compound.

  • Effective permanent removal of scratches - Water-based compounds remove scratches permanently. Solvent-based compounds can lose gloss after cleaning the surface with a degreaser and in some cases, they may only temporarily hide the scratches.
  • Safer for the operator - No hazardous chemicals  
  • Sustainable  - Water-based polishes are better for the environment and do not contain benzene or similar hazardous chemicals.



Learn more about our polishing products

Solvent-based polishes may be effective in the short run, but they are more damaging and harmful.

More Products for Improving your Marine Surface Finishing Application