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Code: 116
Fenwicks FS1 Concentrated 1 Litre, Makes 11 Litres of bike cleaner from 1 litre.
  • Loved by bike mechanics up and down the country, Fenwick`s FS-1 is a superb 2 in 1 bike degreaser and cleaner that offers unbeatable performance and value for money.
  • It is produced using only the most biodegradable, environmentally friendly raw materials available.
  • For use as a BIKE DEGREASER: in its concentrated form, FS-1 can be applied straight onto the drivetrain, agitated after a minute or two, and washed off with a hose pipe - no need for a jet wash and the resultsare sparkling.
  • For use as a BIKE CLEANER: FS-1 can be diluted with 10 parts water, providing an extremely effective, deep cleansing action for the whole bike. It then washes off with ease and leaves a superior, residue-free finish.
  • FS-1 contains no aggressive ingredients and therefore, can be used every day without causing any damage to the finish of your frame or components.
  • It is safe for use on: hubs, headsets, pivot points, disc brakes, rims, shock units, aluminium, steel, carbon fibre, composites, plastics, decals and rubber.
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This is fanatastic stuff! I recall mention of it somewhere being an extremely effective degreaser and suitable for cleaning chains. My chain tends to get very dirty very quickly, as I ride along a waterfront, so the chains gets fairly muddy and covered in everything from grass to sand. Cleaning the chain was always a huge chore, and utterly dissatisfying as the chain never became really clean. I used some off-the-shelf degreasers from Homebase which were only good at removing the worst of the grime, but never reaching deep enough into the links to properly clean them - I could always hear some crunching noise of caught sand or something else. With Fenwicks, the experience was really different. I soaked the chain in the liquid pure for about 10 minutes, and then agitated it in a closed container for almost 10 minutes. After a good rinse, my chain was in an almost-new state, and the links perfectly clean. I quickly covered them in WD-40 to prevent water from sitting in, and then went about drying and replace the WD-40 with some proper chain oil. Really great! For the cleaning the bike it works fantastically as well, and - no joke - it works as a good oil/fat based stain remover. I've used it on my carpet and on some cloths to good effect - disclaimer, I did experience some slight discolouration, but very minor.
Hadn't used this before and really impressed. Used neat on the chain and cassette and got a filthy drive train clean and shiny. Very impressed and would buy again.
Very good indeed, by far the best drivetrain cleaning product I've used.
The best product of its type I have used. Brings the chain up sparkly and new when used with the Park Tools chain bath. Use diluted generally on the rest of the bike in a similar way to Muc-Off.
Great for degreasing chains and also cleans rest of bike when diluted
Used this for years. Neat for chains, sprockets etc and diluted in spray bottle for general cleaning. Great product.
The best bike cleaner on the market in my opinion. Used neat in a chain scrubber or diluted for general cleaning it gives great results in no time at all. Good value for your money as well
First time using this and it is Great stuff, really works well compared to previous other aerosol makes used.
I love the product, have used it for years but never found a 5ltr bottle untill I came to merlin cycles. Great product and great delivery, the order was despatched on monday and arrived the next day. Very happy with the product and merlin cycles.
Works superbly well. Have only used non-diluted so far but, in conjunction with a Park Tools chain bath, got everything sparkly clean!
Excellent product. Use it diluted for cleaning and neat for complete degreasing. Have found it to be excellent on all parts of the bike. No worries about damage to the paint work etc. No sticky residue left unlike other well known products I have used
Excellent product. Cleans the chain real good
I use this in a Park Tools chain bath. It does remove the majority of gunk, however, after using the chain bath a bit of scrubbing and elbow grease is required to ensure that the chain is squeaky clean.
Cleaned up old bike parts very effectively.
Really really good product. Cleans & degreasers like magic.
This stuff is great - either dilute for genearal cleaning duties or use as concentrate on chains etc. Fast delivery again!
Love this stuff. I just use a brush to get the stuff on my chain and gears then rinse it off after a couple of minutes, with water. Clean as a whistle. Not used it diluted yet for the rest of the bike, but I am going to soon.
I only use this for cleaning, it does everything I need and lasts for ever!
Good value and cleans the chain as good as any other more expensive fluid.
Environmentally friendly and does the job perfectly. Brilliant!
Great product, use neat as chain degreaser and dilute for general bike cleaning.
Good quality powerful degreaser. Works well as cleaner at 10-1 and lasts ages.
Top product! Cleans muddy MTB and chain set with ease! Wouldn't be without it.
Excellent stuff- use neat in a chain bath for sparkly chain, or dilute as directed for very a very effective overall bike cleaner. Carbon friendly and eco friendly too.
Great product, does what it says on the bottle and excellent value for money as its concentrated so this 1 litre bottle makes 10 litres of cleaner.
It calls itself a Bike Cleaner and low and behold it cleans bikes - well.
Amazing cleaning power!
does degrease but not very good but water it down and you can wash ur bike in it .its better than m*** of and a lot cheaper will buy again
Clean the bike, degrease the chain, it works and lasts.
Only used as chain cleaner so far and done much better job than the muc off chain cleaner.
Excellent degreaser, price and service.
Excellent multi-purpose product
Great suff, does exactly what it's supposed to do!
Great product. Equal to or better than muc-off when diluted and really powerful as a concentrate. Great value too. On another note, Merlin's service was outstanding as usual (1 day turnaround!)
Excellent service as usual, i always check with merlin first. Thanks again
Only used once but seems excellent. Only needed a small amount to bring the rear cassette up like new. Will dilute to use as a general frame/wheel cleaner.
This is the best cleaning fluid as it is concentrated so goes much further than a squirty bottle. Also used concentrated really cleans chains!
Unbeatable value bike cleaner. Use neat to degrease chain etc. or dilute and use it like Muc-off. The best bike cleaner.
Works really well for cleaning chain and chainset although you do need to scrub with toothbrush if very dirty
Excellent stuff! Use neat as degreaser on mucky chains and dilute for other parts.
Second time I've ordered this. I use it neat on the chain with a chain cleaning device and dilute it down to give the whole bike a wash. Highly recommended.
This cleaner when diluted to whatever strength you require, is first class. It beats the 'MUC OFF' product by a mile, and works out a lot cheaper. Highly recommend it. It's gereat for alloy car wheels as well.
Great cleaner that does it all; dilute for using all over the bike (1/20 is fine) or use neater for degreasing (1/2). I can confirm that you can use on discs and pads with no problems.
Seems to work much better than other chain degreasers I have used. Good price, good service.
Makes up to 10 litres of bike cleaner when diluted which easily stands up to similar products for a fraction of the price. A bottle of this will last me approx 2 years and we have 8 bikes in the stable! Absolute bargain
Have been using this stuff for years, does what it says and is good value for money.
Been using it for 3 years and always does the job, either diluted for a wash or neat on the greasy stuff.
Use neat in chain cleaner. Dilute 10:1 for general cleaning. Economical, smells nice. Can also be used to clean conservatories and othe PVCu stuff.
This is the best cleaning liquid on the market. Delivered quickly and as described.
Does what it should do. 1 litre dilutes down to last ages.
This stuff is great much kinder on the bike than muck off. Dilute down to make 11litres in total and spray it every where. Makes cleaning far easier.
fantastic product, excellent as a bike cleaner when diluted & good as a degreaser when used neat.