Item: 777631

Halfords Shock & Unlock Spray 400ml


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  • Halfords Shock & Unlock Spray 400ml

    The Halfords Shock & Unlock Spray combines powerful penetrating fluids and freezing agents which "shock free" rusted agents and jammed connections.

    features & benefits of Halfords Shock & Unlock Spray

    • Frees rusted components
    • Dual action penetrates and cools
    • Synthetic base oil
    • A powerful penetrator and releasing agent
    • Releases seized rusted bolts and locks
    • Penetrates rust, grease, oil & carbon
  • Rated 3.8 out of 5 by 9 reviewers.
    Rated 5 out of 5 by Halfords Shock & Unlock Spray 400ml brilliant ..saved me pounds..spark plugs seized ....garage wanted to take head off.....within 5 mins spark plugs out new ones in........halfords thank you............ 05 May 2016
    Rated 5 out of 5 by shocked & unlocked Had a seized clutch on my overwintering mini. This product went a long way to rectify the situation. 02 May 2016
    Rated 5 out of 5 by Rusty nuts Needed to remove spot lamp from a classic mini. Nut immovable, rusted after 15 years. Sprayed on the solution. Left for 5 mins. Turned and removed easily. Very good. 19 November 2015
    Rated 3 out of 5 by Halfords Shock & Unlock Spray Copes well on most items but has its limitations. Good value in comparison to more expensive sprays. 06 December 2013
    Rated 5 out of 5 by great product use this product to free up my motorcycle exhaust studs they come loose with few shot of this stuff very good product 27 November 2013
    Rated 5 out of 5 by Awesome Product For Stuck Seatposts I recently needed to adjust my seatpost height. However, being a carbon post in a carbon frame, I didn't bother to apply carbon paste. Having ridden through a very wet winter, it meant that my post was very firmly jammed in the seat tube. I couldn't twist it, even remotely. I read on a cycling forum to give this product a go. Looking at the previous reviews, I didn't hold out much hope. However, after spraying a liberal amount around the seat clamp area and leaving it for a short while, the post came out with ease. I couldn't believe how effective it was!! I can't speak for it's other uses, but if you have a seatpost you cant remove, this product is fantastic. 29 June 2013
    Rated 1 out of 5 by Shock Spray I did not find this product useful, The freeze spary offerred by Loctitie for a few pounds more is far better. 03 March 2012
    Rated 2 out of 5 by Halfords Shock & Unlock It promises to unlock carbon parts but it didn't work in my case. 20 February 2012
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  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on

    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

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Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

Halfords Rust Removal & Treatment

Halfords Shock & Unlock Spray 400ml

£3.49 Halfords Shock & Unlock Spray which "breaks free" rusted agents and jammed connections.