Biokem SP15




Fuel micro-biocide

For treatment of Cladosporium Resinae and Pseudomonas aeruginosa

(fuel bug)

Bacterial infections in fuel lead Biomass sludge to form, causing filters to clog and tank pitting. The knock on impact is systems stalling and if left untreated, the result is often permanent damage to fuel systems, as well as fuel being unusable. Replacing systems and fuel is then obviously a costly event which could have been avoided.


Did you know we sell Biokem online? visit our webshop (WASP PFS Ltd) by clicking here


What is Biokem?

WASP® BIOKEM SP15 is a concentrated effective biocide/fungicide designed for all fuel oils. Rapidly destroys micro-organisms and provides long term protection against further infection.

  • Effective at high dilution
  • Nitrite free
  • Universal application
  • Good material compatibility
  • Long Lasting
  • Supports anti-corrosive properties
  • Low toxicity
  • Boosts pH levels


How do I know I have a bacterial infection in my fuel?

bacteria on element smallYou will probably first notice you have a bacterial infection in your fuel when you see foreign matter floating on top or mixed in with the fuel.

Your boat or equipment using the fuel may not be running efficiently.

There are hundreds of various forms of bacterial infection which can live and multiple in fuel and can be all different forms, sizes, shapes and colours, from an earthy brown to luminous green.

 Does it work?

The effectiveness of WASP® BIOKEM SP15 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). WASP® BIOKEM SP15 is a high performance antimicrobial agent developed specifically to combat problems of microbial contamination and spoilage in hydrocarbon fuels.

In 2011 it was entered into two magazine group tests, the results speak for themselves.

WASP biokem award 2 small WASP biokem award 1 small

Can I use WASP® BIOKEM SP15 to prevent a bacterial infection?

Yes, and we suggest doing so to avoid the costly expense of finding out about the infection when it is too late to be treated resulting in the need to replace storage equipment and your stored fuel.

Prevention is better than cure!

Do I need to remove the bacteria already there?

fuel sample bottles smallWASP® BIOKEM SP15 will kill live bacteria but to remove it completely, you will need to filter out the bacteria which is already in your fuel. It is worth noting other similar products claim to remove existing infections. While the majority of similar products may break down the infection (including BIOKEM), and prevent further infection, none will completely remove the matter already there. If you intend to use BIOKEM for a boat, it may already have a filter which can be run to clean out the matter.

If you would like more information on a filter system, please contact Separ on 01923 276 007 or email This email address is being protected from spambots. You need JavaScript enabled to view it..


  What quantity options are available?

  • 5kg (5 lit approx) bottles
  • 250ml bottles
  • 50ml bottles

What is the recommended dosage?

WASP® BIOKEM SP15 should be dosed as follows (based on the 250ml bottle size)

(dose ratio)
5L bottle treats
250ml bottle treats
50ml bottle treats
50000 litres of fuel
2500 litres of fuel
500 litres of fuel
Moderate contamination
25000 litres of fuel 
1250 litres of fuel
250 litres of fuel
Heavy contamination
15000 litres of fuel
750 litres of fuel 
150 litres of fuel


Treat as per table above and re-treat periodically at 5000:1 to 10000:1 to control re-infection. Best results are obtained if the system can be re-circulated to fully disperse the Biocide. When dosing with WASP® BIOKEM SP15, ALWAYS mix the required dose with a greater quantity of fuel BEFORE adding to the fuel tank. This ensures a quick and efficient dilution with the infected fuel. For bio-diesel we recommend double-dosing, so a 250ml bottle is enough to treat 375 litres of fuel with heavy contamination (1500:1).

Download a PDF of BIOKEM Information

Place an order OR Find out more

Contact Separ on 01923 276 007 or This email address is being protected from spambots. You need JavaScript enabled to view it.



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. 

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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.



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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