Kathon FP1.5 Microbiocide

Kathon FP 1.5 is a patented high performance antimicrobial agent developed specifically to combat problems of microbial contamination and spoilage in hydrocarbon fuels.



The effectiveness of Kathon FP1.5 has been proven over a number of years and it has extensive approvals endorsing its use in a wide range of fuel types. It combines exceptional activity with broad spectrum performance, consequently it is effective at very low use levels against all commonly occurring fuel contaminates (bacteria, fungi and yeast).

Kathon FP1.5 is supplied in 5kg (aprox 5L) bottles and remains effective for approximately 2 to 3 months. Larger quantities can also be supplied, details available on request.










As reviewed in PBO April 2007.

'significant reduction of up to 10,000 fold after three days' (Bacterial infection killing)

'In the prevention trial Kathon not only prevented microbial growth, but killed inoculated microbes to below detectable limits'. 

Basic details 

Basic Useage 

Kathon FP1.5 should not be added directly into the fuel tank. It should first be diluted with approximately 5 litres of fuel and then added to achieve an even dilution with the contaminated fuel.

Heavy contamination 
100ml per 300 litres
Moderate contamination 
100ml per 500 litres
100ml per 1000 litres

Where possible water and sludge should be removed from the bottom of fuel tanks before and/or 12 hours after dosing Kathon FP1.5 (please see the Separ Fuel Polishing System for more information on this). If this is not feasible, Kathon FP1.5 can still be dosed, but filters should be checked 2 or 3 times in the first week.

Links to further information
For other Kathon data, including MSDS, the current brochure and the approval and compatibiltiy list, please refer to our Documentation section.


Need help selecting a filter?

See our guide to help you select the most suitable filter for your needs.

Technical Support

How it works

See how the Separ filter works to separate water and particulate from fuel. 

SWK2000 flow diagram transparancy

How to Order

Call or email us to place your order. We accept ALL major credit and debit cards, bank transfer and also PayPal. 

Contact Us TabPhone copy


Expert advice

Unsure which spare parts you require? Or if a Separ filter will meet your requirements? 

Talk to our expert team. Call 01923 276 007



Delivery options

We have a wide range of shipping options available to suit your destination and budget.



Wooden-Crate-psd42799 copy

Contact Us

3 Kingley Park, Station Road, Kings Langley, Herts, WD4 8GW

Tel: +44 (0)1923 276007

Fax: +44 (0)1923 267463

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Here to Help

Product guides

Fuel Specs


Selecting a Filter