Putting the boat away for winter? Start with a fresher cabin.

A little preparation before you close the hatch can make your next visit more welcoming. Here’s how to make mould and musty-odour control part of your winter boat storage routine.

There’s a familiar moment when you open a boat that hasn’t been used for a while. Before you’ve put your bag down, you notice that stale, closed-up smell.

Whether you’re leaving a yacht at the marina, storing a launch or parking a cabin boat between trips, the interior deserves attention before winter. Damp gear, trapped moisture and limited air movement can create conditions where mould develops.

Download your free winterising guide

Keep a practical plan aboard your boat. Our six-page guide includes a printable preparation checklist, cabin-care advice, SAN-AIR product guidance and a winter check log.

Download the free winter boat guide (PDF, 8.7 MB)

Start with a clean, dry interior

Before closing up, remove food, rubbish, damp towels and wet clothing. Take bedding ashore to wash and dry, and check cushions and storage areas for moisture. Clean away dirt and allow surfaces to dry thoroughly.

Check for leaks around windows and hatches, and deal with the source of any recurring dampness. Keep the boat’s appropriate ventilation and moisture-control measures in place. A mould-control product belongs alongside these steps; it doesn’t remove the need to manage water and condensation.

Deal with visible mould before storage

If you find mould on a suitable surface, SAN-AIR Surface Mould Remover RTU offers a ready-to-use cleaning option. Follow the product label and test an inconspicuous area first, particularly on fabrics and finished surfaces.

The published directions specify a ten-minute dwell time before wiping clean, followed by a light reapplication left to air dry. Check both the product instructions and the care guidance for your boat’s materials before treating them.

View Surface Mould Remover RTU 500ml

Add ongoing cabin care

SAN-AIR Caravan, Boat & Storage Reactive Gel is designed for enclosed spaces that sit unused between trips. It helps neutralise musty odours and supports ongoing mould control.

The gel needs air moving across it to evaporate and disperse through the space. That makes placement important. Where cabin air is still, the SAN-AIR Air Diffuser helps circulate the gel’s vapour. Its two-AA-battery operation offers an option where shore power isn’t available.

Think about the boat’s layout

Remove the gel’s seal, replace the lid and open the vents as directed for the space. Place it securely on a stable surface with airflow, following the diffuser instructions if using one.

A main saloon, separate sleeping cabin and closed locker don’t necessarily share the same air. Don’t assume a single placement will reach every compartment. If you’re unsure how to cover your boat’s layout, ask the SAN-AIR team for placement advice.

Make checks part of the winter routine

SAN-AIR’s guidance gives the gel pottles a typical life of six to eight weeks. Check the gel and diffuser batteries during visits, and replace the gel when it has dried into a hard, brown piece. Plan for replacements if the boat will be stored for several months.

Use those visits to check for leaks, damp gear and new mould, too. The aim is a manageable routine: prepare the cabin, support ongoing mould and odour control, then keep an eye on conditions.

Getting the interior ready now gives you one less job when the next good boating day arrives.

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