--- product_id: 48069340 title: "Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid" brand: "granville" price: "¥6749" currency: JPY in_stock: false reviews_count: 13 url: https://www.desertcart.jp/products/48069340-granville-1440a-10k-375ml-boost-stop-leak-power-steering-fluid store_origin: JP region: Japan --- # 375ml precision volume Stops & prevents leaks Seal conditioning formula Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid **Brand:** granville **Price:** ¥6749 **Availability:** ❌ Out of Stock ## Summary > 🛠️ Seal the deal with Granville – power steering’s secret weapon! ## Quick Answers - **What is this?** Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid by granville - **How much does it cost?** ¥6749 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/48069340-granville-1440a-10k-375ml-boost-stop-leak-power-steering-fluid) ## Best For - granville enthusiasts ## Why This Product - Trusted granville brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seal Savior:** Gently conditions and rejuvenates seals to extend their lifespan and maintain system integrity. - • **Leak No More:** Effectively stops and prevents power steering fluid leaks, saving costly repairs. - • **Compact Power:** 375ml tin designed for easy handling and precise dosing in any vehicle maintenance routine. - • **DIY Confidence:** Empowers you to fix leaks yourself, avoiding expensive garage visits and downtime. - • **Trusted Expertise:** Backed by 40+ years of UK-based innovation in automotive lubricants and chemicals. ## Overview Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid is a specialized gel formula designed to stop and prevent leaks in power steering systems. It conditions seals to prevent drying and shrinking, prolonging their effectiveness. Packaged in a convenient 375ml tin, this product leverages over 40 years of UK-based expertise to deliver reliable, DIY-friendly maintenance that reduces fluid loss and protects your vehicle’s steering performance. ## Description As our vehicles get older, we start to notice those little drips and leaks that weren’t their when it was brand new. You may think that you will need a mechanic to find the cause of the problem, but with the wide range of maintenance product from Granville you may be able to solve the problem yourself.10K Boost Power Steering Stop Leak contains a special blend of chemicals developed to prevent leaks and drips that can be caused by the drying out or shrinking of seals within the steering system. The 375ml can not only helps to prevent and stop any drips and leaks it also gently conditions seals to prolong their life and effectiveness.Granville are a manufacturer of high quality lubricants and automotive chemicals. Granville have a wide range of products and brands which enables them to utilise their knowledge and expertise to create innovate and quality products. With over 40 years of knowledge within the market, this UK based manufacture continuously develops and strives to keep up with the dynamic pace of the automotive industry. Review: Great product - Previously used similar items to try and cure my power steering leak to no avail. I was loosing roughly half a bottle a month. And was to cheap to take it to a garage lol. Purchased this down to the good reviews and I’m happy I did. I changed the power steering fluid with fresh stuff and added this product. Over a few weeks I did loose some fluid however noticeably less then previously. After 3 weeks or so I topped the fluid back up to the mark and since I haven’t lost a single drop of fluid . Great product and done what a lot of other products couldn’t . Review: Handy - Surprisingly this actually help an old car with power steering leek, idk if it’ll permanently seal but y did the job ## Features - Harmful if swallowed. - 10K Boost Power Steering Stop Leak - Specially designed for power steering systems - Stops and prevents future leaks - Gently conditions seals - 375ml Can ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007FND570 | | Best Sellers Rank | 80,114 in Automotive ( See Top 100 in Automotive ) 92 in Hydraulic Oils | | Brand | Granville | | Brand Name | Granville | | Container Type | Tin | | Customer Reviews | 3.9 out of 5 stars 861 Reviews | | Global Trade Identification Number | 05020618014409 | | Included Components | Granville 375ml Boost Stop-Leak Power Steering Fluid | | Item Form | Gel | | Liquid Volume | 375 Millilitres | | Liquid volume | 375 Millilitres | | Manufacturer | Granville Oil & Chemicals Ltd | | Material | Aluminium | | Model Number | 1440A | | Number of Items | 1 | | Package information | Tin | | Part Number | 1440A | | Recommended Uses For Product | Prevents from future leaks | | Recommended uses for product | Prevents from future leaks | | Specific Uses For Product | Prevent Corrosion | | Unit Count | 375.0 millilitre | | Viscosity | 10w-40 | ## Product Details - **Brand:** Granville - **Liquid volume:** 375 Millilitres - **Material:** Aluminium - **Package information:** Tin - **Recommended uses for product:** Prevents from future leaks ## Images ![Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid - Image 1](https://m.media-amazon.com/images/I/51FOXkVhBJL.jpg) ## Questions & Answers **Q: Will it work on my peugeot 406td as lucas don't recommend theirs for my car?thanks mr granville** A: I have had good experiences with Granville Power steering stop leak to cure leaky seals or a noisy power steering pump . I've also tried the Wynns product , but this was too viscous and made the steering stiff, which the Granville product didn't. However, make sure you check where the leak is coming from first. If its past a rubber seal then this is the product to use. If however, its from a metal pipe like the power steering cooler, no stop leak will fix the latter. One of my cars had such a cooler , which was a metal pipe running infront of the power steering unit or even plumbed infront of the radiator. It had simply corroded through due to rust and needed replacing . The stop leak causes the rubber seals to swell and unlike a radiator stop leak, does not plug holes in corroded metal pipe, regards Dick Turbo **Q: Will it work on my Vauxhall’s insignia power steering** A: It worked on my Fiat Ducato Van i had quite a bad Leak on the steering rack so i thought i would spend £10 to see if it worked Rather than £1000 for a new steering rack. it takes a while to get through so there are not instant results. may be an idea to remove as much fluid as you can from the reservoir then fill up with the stop leak then top up with fluid if necessary **Q: Is it ok for a 96 Bentley Turbo R** A: It's fine for any car that takes power steering fluid. Mine is a Mercedes 430ML. The power steering pump was noisy. My mechanic said to try this before replacing the pump. It works by softening the seals up again. In mine the noise has gone and everything works beautifully. **Q: 10k boost power steering stop leak is it ok for Ford Focus** A: Yes. 100%. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by H***N on 8 January 2018* Previously used similar items to try and cure my power steering leak to no avail. I was loosing roughly half a bottle a month. And was to cheap to take it to a garage lol. Purchased this down to the good reviews and I’m happy I did. I changed the power steering fluid with fresh stuff and added this product. Over a few weeks I did loose some fluid however noticeably less then previously. After 3 weeks or so I topped the fluid back up to the mark and since I haven’t lost a single drop of fluid . Great product and done what a lot of other products couldn’t . ### ⭐⭐⭐⭐ Handy *by T***S on 15 May 2026* Surprisingly this actually help an old car with power steering leek, idk if it’ll permanently seal but y did the job ### ⭐⭐⭐⭐⭐ It works as long as you have have an idea *by R***C on 20 June 2025* Don't listen to the negative reviews, if used correctly this stuffs brilliant. So firstly,if you have a massive leak or a split hose this stuff won't work, it's not a miracle in a can ! Its not a substitute for replacing knackered and completely worn out parts. However, if you have a drip drip type leak then this could do the job but....I suspect a lot of ppl have been tipping the entire can in to their systems then becoming dumbfounded that the leaks got worse! This stuff is water thing and contains a solvent that revitalises seals , a little drop will do you! Start with just under a quarter of the can make sure the fluid is on the stick. Start car and rotate steering a dozen times, then take for a 15 mins drive , make sure there are some corners and junctions, park car , check for leaks the next day , add a touch more if required ## Frequently Bought Together - Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid - Granville 1813A 500ml Power Steering Fluid and Condition --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/48069340-granville-1440a-10k-375ml-boost-stop-leak-power-steering-fluid](https://www.desertcart.jp/products/48069340-granville-1440a-10k-375ml-boost-stop-leak-power-steering-fluid) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-21*