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GT-85 Bike Lubricant

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£3.00 Best Offer by: amazon.co.uk marketplace See more offers
3 Reviews

Brand: GT-85

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    3 Reviews
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    • More +
      04.03.2014 10:55
      Very helpful
      1 Comment



      Keeps your chain lubricated

      I've always used either light machine oil or WD40 to oil bike chains, but when I spotted this on offer at Halfords (it was £1 I think, reduced from about £3) I thought it was worth giving it ago. All my kids are quite keen cyclists, but the boys in particular tend to leave them wet and muddy, and so we spend a fair bit of effort keeping them in good order. They are gradually learning to look after things better in the first place but it's a slow process!

      I was especially interested in trying this because I thought the PTFE might help repel water and therefore stop rust forming, if it formed a protective film as claimed.

      GT 85 comes in a large aerosol canister, 400ml, with a thin but rigid plastic straw to fit into the nozzle.This is held on to the can with a rubber band - always nice to see a low-tech solution! This is useful for directing the spray accurately, obviously you wouldn't want the stuff to stray onto your brake blocks for example. When you press the nozzle, a transparent and slightly oily smelling spray comes out. Squirting along the length of a chain takes only a few moments. I would say it sticks better than WD40, at least it doesn't drip quite so much, which means it stays where you want it, a definite plus.The smell may just be the propellant as it seems very similar to WD40.

      Des it work? Well, it certainly seems to be at least as good as the other options I've tried in the past. Although I haven't kept careful notes (or indeed, any at all), I don't think the bikes have required as much maintenance as before, though equally it's been winterso they haven't used them as much. So I will call this a qualified success.

      I've also used the spray to remove rust. In this respect I don't think it's as effective as WD40. However, it is ok at loosening nuts and bolts which are too stiff to get apart - a quick squirt, leave it for five minutes, and the problem is usually solved. For that I would use whichever product is nearest to hand, there doesn't seem much difference between them.

      The warnings on the can are quite clear that it is flammable and harmful if breathed in - well you certainly wouldn't want a lungful of PTFE. I would generally only use it outside for this reason, and if you are using it inside to loosen something, it is wise to be cautious, make sure the room is well ventilated and use it sparingly.

      I bought this can about 6 months ago and it's still going strong, so given that we've got 7 bikes to look after, it's doing quite well. The real test will be later on in the year when cycling becomes a daily activity, and splashing through as many puddles as possible a target for the young cyclists!


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      • More +
        13.07.2013 20:36
        Very helpful



        The can is not running out at all!

        I love cycling and since I have been using my bike more now that the weather is better, it needs more regular maintenance. In the past I have let my dad deal with this, and didn't do anything to my bike last summer or over winter.

        Halfords had this bike lubricant spray for free on o2 moments. I picked up a can, and tried it out on my bike by spraying the chain, pedals and gears on the wheel. I also sprayed the wheels where they are attached to the frame, and the join for my handlebars to the body. I have sprayed it twice in a few months as the bike is now kept outside in a bike shed. It has stopped the random clanking noises that were happening before I got the can.

        Don't use this inside, it stinks of metal and makes you cough. Spray the bike from about 30cm away and keep your face turned away so you don't inhale it.

        The spray comes out quite thinly and just leaves a sheen on the surface of the bike. Its not oily unless you touch it but it dried after cycling around for a while.

        I think you could probably use it on other squeaky joins like hinges and doors. I haven't tried it on anything else apart from the bike. Apparently it leaves a nice sheen on cars interior plastic trims and leaves a film from PTFE. Its also good to get to rusted parts and lubricate them. You should also use it after you have been on a very rainy or wet cycle ride so that your bike doesn't disintegrate.

        It comes in a red can and you get a decent amount. The can is quite heavy. It costs £3 without the o2 deal which has now ended.


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        02.05.2013 13:30
        Very helpful



        Ideal for breaking down dirt and rust on metal. Leaves PTFE coat to protect parts.

        Working as a plant fitter sometimes when fixing machinery parts are hard to remove and I need a little help to get them off without damaging them. The old weapon of choice I used to turn to when in need was WD40. GT85 was a product that I had never heard of before but is now WD40's main competitor in the aerosol lubricant market.

        GT85 is slightly cheaper than WD40. Using prices obtained from Halfords both come in a 400ml aerosol can but GT85 is £4.99 and WD40 is £5.99. Not a huge difference in price but to some people every penny counts.

        GT85 comes in a red and black aerosol can with GT85 written on the front in big white letters. The can also states that it is a lubricant, penetrator and water displacer. It also states "voted number one by professionals" and that the spray contains PTFE. When you buy it the can should have a straw sellotaped to it. The straw fits into the nozzle so you can reach into less accessible places. WD40 sell an aerosol with the straw attached to the can. You will lose the straw it is inevitable. Well it always seems to be for me anyway.

        WHY PTFE?

        PTFE is an abbreviation for Polytetrafluoroethylene. Quite a mouthful and would take up half the can if you used its proper title.
        Firstly when you spray your item with GT85 it leaves a layer of PTFE on the surface of the object. It is used a lot by cyclists on chains and gears. The PTFE stops water spreading and settling on surfaces and makes it easier to wipe off. If the PTFE protects the metal then rust cannot form and will prolong the life of the metal.

        PTFE also provides easier movement between two metal objects moving against each other. So again perfect for cyclists that have sprayed it onto bicycle components like the chain and gear cranks.


        GT85 does work very well as a lubricant. In my opinion it is better than WD40 for the simple fact that when you spray it onto a moving part and let it settle it sticks better. WD40 seems to drip off more and anything that drips off is basically being wasted. GT85 will stick to the metal as the PTFE dries onto the surface leaving a longer lasting lubricant on the metal. It displaces any water that finds its way onto the metal so it cannot rust or sometimes if you spray electrical components it can stop water getting in and shorting the electrical equiptment.

        Obviously if you have anything that squeaks like moving parts on machinery, bike components or even a door in your house. GT85 will work a treat to make it free again.


        Sometimes if two parts are stuck together simply using a puller or giving it a good old whack with a hammer just will not do. I spray GT85 onto the surface and leave it a while to run in between the two surfaces. Sometimes even if the surfaces are very tight together you can see where the GT85 has penetrated through the dirt and rust and come through the other side. This means it is definitely working. Even with the spray you still have to take extra measures to some particularly stubborn parts but more often than not it does the job and makes it far easier to remove one object from another.

        OTHER USES.

        GT85 can also be used to clean plastics and metals. It will take dirt and rust off metal simply by using a rag to wipe it. It is also the same with plastic. I used to repair a lot of power tools (drills, sanders etc). These tools would have been on hire on building sites and treated roughly and would come back wet and filthy.

        Any moisture on an electrical tool could be dangerous and would cause it to fail it PAT test (electrical safety test). This is again where PTFE comes in handy. First by displacing and drying out any moisture and then leaving a protective layer of PTFE for the next time its thrown in a puddle.

        It also leaves a good shine on plastic so even though the tool would be roughed up you could still make it look acceptable for the next customer to hire it. I have seen people use it on the dashboard in their cars and vans but I wouldn't myself. It is after all an oil based product and although it does leave a good shine it also isn't the best smell.

        If you work in an engineering or mechanical background make sure you always have some GT85 at your disposal you will definitely need it at some point. If you just like to tinker about at home with bikes or mechanical equipment make sure you keep some in your shed or garage it will come in handy at some point. In fact I would say that GT85 is quite possibly the best maintenance spray out there for cyclists due to the properties is possesses.

        Even keep a can just for odd jobs around the house. Squeaky doors or seized hinges. GT85 will solve that problem. For £4.99 you cannot complain at the quality of the product and 400ml is a good sized can that will last a long while.


        The only warnings that GT85 carries are that firstly the spray is highly flammable so do not spray near any naked flames or onto anything that is extremely hot.

        Secondly do your best to keep it off your skin. It warns that it may dry the skin and crack it. i have used this spray for quite a few years and have never had any problems with the skin on my hands.
        Thirdly always wear safety glasses when spraying it. There isn't a particular warning regarding this on the can but it is basic common sense. Nobody wants a pressurised spray in their eye, never mind an oil based one. Plus if the PTFE can coat metal then i don't think it will react to well with your eyeball.


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