Marine 16 Diesel Bug Treatment (DBT) is a Biocide formulated specifically for preventing or eradicating the microbial contamination known collectively as Diesel Bug.

DBT – Diesel Bug Treatment is a broad spectrum biocide formulated to prevent or eradicate the microbial contamination of fuel from Yeast, Mould and Bacteria commonly known as Diesel Bug.

A 100ml bottle is sufficient to prevent diesel bug growth in 2000 litres of fuel (50ppm). For serious contamination this should be increased to 100ml to 100 litres (1000ppm).

Our diesel bug treatment disperses into both the water and fuel phases in your tank and will remain sufficiently active for over a year at both high and low temperatures.

Marine 16’s Diesel Bug Treatment is the fuel treatment of choice for the RNLI, The Royal Marines, Sea Start and River Canal Rescue as well as being number 1 in the Practical Boat Owner magazine review.

Overdosing will not harm your engine.

Note: Diesel Bug exists because there is water, it is essential to drain the water out of the tank regularly, at least once per month.

Please see below for a list of supplier sizing guides. If you have any issues, please don't hesitate to get in touch. We're here to help.

If we are missing a supplier, please send us an email and we'd be happy to source the correct sizing guide for you.

We offer free shipping to all addresses in the Republic of Ireland for orders over €60 (large, bulky and heavy items like kayaks and boats are excluded from free shipping). Orders under €60 will be charged a flat €7.50 rate.

Orders are shipped with both Fastway and DPD Couriers. If you have a preference for who we ship your order with please specify this in the order notes.

We endeavour to ship all orders received before 12pm the same day.

Orders received after 12:00 noon will be shipped next day (approx delivery time Ireland 1-2 working days).

Delays may be experienced during certain times of the year and if this is the case we will contact you as soon as possible via email.

We offer shipping to all addresses in the United Kingdom for a flat rate of €14.95. We may not be able to ship large, bulky or heavy items. Please call for such items. Please note customs charges may apply.

We reserve the right to change these conditions for exceptionally large or heavy items or items of a hazardous nature. We will keep you posted of any changes to the best of our ability.

International Shipping Charges

EU Near

Order Value	Shipping Charge
€1.00 - €99.99	€12.95
€100 - €299.99	€14.95
€300 and up	Free

EU Mid

Order Value	Shipping Charge
€1.00 - €99.99	€14.95
€100 - €199.99	€19.95
€200 - €449.99	€24.95
€450 and up	Free

EU Far

Order Value	Shipping Charge
€1.00 - €199.99	€35.00
€200 - €499.99	€40.00
€500 and up	Free

Terms & Conditions - Please note that any items of exceptional size (volume, weight, length) may require a surcharge. In this event we will contact you in advance for approval.

Certain items of extraordinary nature (Paint, Oils, Epoxy etc) may not be possible to ship depending on your location. In the even of an order being unsuitable for shipping we will refund your order immediately and contact you to confirm cancellation of your order.

We reserve the right to change these conditions for exceptionally large or heavy items or items of a hazardous nature. We will keep you posted of any changes to the best of our ability.

Inclusion of any product on our website is not a guarantee of it being in stock at the time of ordering. We stock one of the most comprehensive ranges of sailing equipment in the country. However situations beyond our control may occasionally result in an item(s) being temporarily unavailable.

Items discontinued by manufacturers or that are no longer available: we aim to remove from our website as quickly as possible, but remember, we are only human after all.
If we are unable to supply any item(s) within 7 days, you will be contacted by telephone or email to offer alternatives or cancel your order. Available to order items, marked to follow will be sent automatically when they become available. We do NOT make additional charges for this service.
In any case, we aim to deliver goods within a maximum time frame of no more than 10 days from receipt of order. If we are unable to do this, you will be contacted to make arrangements for any necessary refund to be issued.