--- product_id: 48736745 title: "WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose..." brand: "wd-40 specialist" price: "¥3570" currency: JPY in_stock: true reviews_count: 8 category: "Wd 40 Specialist" url: https://www.desertcart.jp/products/48736745-wd-40-specialist-penetrant-spray-400ml-rust-penetrating-oil-spray store_origin: JP region: Japan --- # Smart Straw for precise spray Works from -20°C to +90°C Penetrates rusted bolts fast WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... **Brand:** wd-40 specialist **Price:** ¥3570 **Availability:** ✅ In Stock ## Summary > 🛠️ Rust doesn’t stand a chance — unlock, protect, and conquer with WD-40 Specialist! ## Quick Answers - **What is this?** WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... by wd-40 specialist - **How much does it cost?** ¥3570 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/48736745-wd-40-specialist-penetrant-spray-400ml-rust-penetrating-oil-spray) ## Best For - wd-40 specialist enthusiasts ## Why This Product - Trusted wd-40 specialist brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Weather Reliability:** Performs flawlessly from freezing cold to scorching heat (-20°C to +90°C). - • **Precision Spray Control:** Integrated Smart Straw delivers pinpoint accuracy or broad coverage with 360° valve. - • **Engineered for Professionals:** Trusted by mechanics and engineers for consistent, industrial-strength performance. - • **Long-Lasting Corrosion Defense:** Leaves a water-resistant barrier protecting metal, rubber, and plastic surfaces. - • **Unlock Rusted Joints Instantly:** Penetrates deep to free seized bolts, nuts, and fixings where others fail. ## Overview WD-40 Specialist Penetrant Spray is a professional-grade lubricant designed to rapidly free rusted and seized parts. Its low surface tension formula penetrates deep into corroded joints, working effectively on metal, stainless steel, titanium, rubber, plastic, and PVC. Operating reliably across a wide temperature range (-20°C to +90°C), it also deposits a water-resistant barrier to prevent future rust and corrosion. Featuring a precision Smart Straw and 360° spray valve, it ensures targeted application and minimal waste, making it the go-to choice for automotive, marine, and industrial professionals. ## Description This professional-grade penetrant spray frees stuck parts, removes rust, and provides long-lasting lubrication. Ideal for automotive, marine, and industrial use. Review: Works fast on stuck bolts – a must-have in the toolbox - I recently added the WD-40 Specialist Penetrant Spray to my toolkit, and it has already proven its value. I used it on a couple of stubborn, rusted bolts in my bike and an old garden tool, and within minutes the parts loosened up with very little effort. The spray penetrates quickly and doesn’t have the messy residue that some similar products leave behind. The nozzle gives a controlled spray, so you can target tight areas without wasting product. The smell is noticeable but not overpowering, and it doesn’t linger for long. One thing to keep in mind is that this is designed mainly as a penetrant and not as a long-term lubricant, so after freeing stuck parts it’s best to apply something else if you want ongoing protection. Overall, this is an effective, reliable product that does exactly what it promises. Definitely worth keeping on hand for household repairs, bikes, cars, or any mechanical projects. Review: Rust's Worst Nightmare, But Handle with Care! 🛠️💨 - As a DIY enthusiast and occasional mechanic, I was eager to put WD-40's Specialist Penetrant Spray to the test. Let me tell you, this isn't your grandpa's WD-40! First off, the rapid penetration is no joke. I had a stubborn, rusted bolt that had been taunting me for weeks. A few sprays of this white wonder and voila! It surrendered faster than a politician's promise. 🔧💪 The precision straw is a game-changer. It allows you to target those hard-to-reach nooks and crannies with sniper-like accuracy. No more wasting product or accidentally lubricating your entire workbench! I've used it on everything from squeaky door hinges to seized engine parts, and it hasn't let me down yet. The versatility is impressive - it's like having a Swiss Army knife in a can. However, it's not all smooth sailing. The potent formula means you'll want to use this in a well-ventilated area. I made the mistake of using it in my enclosed garage once, and let's just say I felt like I was at a heavy metal concert minus the music. 🤘😵 Also, while it's tough on rust, it's equally tough on the environment. The warnings about aquatic toxicity are no joke, so be mindful of disposal and runoff. The price point is a bit higher than standard WD-40, but for its specialized performance, I'd say it's worth it. Just don't expect it to replace your entire toolbox - it's a specialist for a reason. In conclusion, if you're battling stubborn rust or need a high-performance penetrant, this is your new best friend. Just remember to respect its power - both in effectiveness and potential hazards. Use it wisely, and your rusty nemeses won't stand a chance! Just maybe wear gloves and open a window while you're at it. 🧤🪟 ## Features - Causes skin irritation. - Extremely flammable aerosol. - May be fatal if swallowed and enters airways. - May cause drowsiness or dizziness. - Pressurised container: May burst if heated. - Toxic to aquatic life with long lasting effects. - Penetrating Oil for Rust: The low surface tension formula penetrates deep into rusted threads and corroded joints, rapidly freeing seized bolts, nuts, and fixings where general-purpose sprays fail, the professional's choice from WD-40 Specialist. - Multi-Surface Rust Release: Loosens rusted hinges, stuck locks, and stiff chains while safe for use on metal, stainless steel, titanium, rubber, plastic, and PVC, performing reliably from -20°C to +90°C. - Lasting Corrosion Protection: Deposits a water-resistant barrier that delivers anti-rust and corrosion protection to guard bearings, pipes, conveyor belts, and exposed fixings against future build-up to extend service intervals between maintenance. - Professional-Grade Performance: Engineered for mechanics, engineers, and professionals who demand consistent results, this industrial-strength penetrating spray operates across a wide temperature range for workshop, garage, and field applications. - Precision Smart Straw Control: Reach tight spaces and awkward angles with the integrated Smart Straw for pinpoint accuracy, or flip down for broad coverage, the 360° valve enables spraying in any orientation, reducing product waste and time. - Specialist Maintenance System: Pre-clean with WD-40 Specialist Degreaser spray, apply Penetrant spray to free seized components, then protect with White Lithium Grease for lasting lubrication, or add Cutting Oil for drilling and metalwork. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B006UCJ5NU | | Best Sellers Rank | 621 in DIY & Tools ( See Top 100 in DIY & Tools ) 8 in Lubricants | | Brand | WD-40 Specialist | | Brand Name | WD-40 Specialist | | Compatible Material | metal,stainless steel,titanium,rubber,plastic,PVC | | Container Type | Tin | | Country of Origin | United Kingdom | | Customer Reviews | 4.8 out of 5 stars 1,236 Reviews | | Flash Point | 44 Degrees Celsius | | Global Trade Identification Number | 05032227443488 | | Included Components | 1 x WD40 Specialist Penetrant Aerosol 400Ml | | Item Form | liquid | | Item Highlight | Rust Penetrating Oil Spray, Smart Straw, Quickly Loosens All Stuck, Seized & Rusted, For Corroded Nuts, Bolts, Hinges & Locks | | Item Type Name | Specialist Fast Release Penetrant with Smart Straw 400 ml | | Item Weight | 374 Grams | | Item weight | 374 Grams | | Liquid Volume | 0.4 Litres | | Liquid volume | 0.4 Litres | | Manufacturer | WD-40 Company | | Material | Grease , Metal, Plastic | | Model Number | 7780195-HHW | | Number of Items | 1 | | Number of Packs | 1 | | Package information | Tin | | Part Number | 443488-BPSSA02589 | | Product Warranty | Na. | | Recommended Uses For Product | Automotive, Marine, Industrial, Nuts, Bolts, Screws, Locks, Pipes, Taps | | Recommended uses for product | Automotive, Marine, Industrial, Nuts, Bolts, Screws, Locks, Pipes, Taps | | SAE J300 Viscosity Grade | 0W | | Specific Uses For Product | Car,Wheel,Window | | UPC | 013523004028 616268302482 | | Unit Count | 400.0 millilitre | | Upper Temperature Rating | 90 Degrees Celsius | | Viscosity | 0w | ## Product Details - **Brand:** WD-40 Specialist - **Item weight:** 374 Grams - **Liquid volume:** 0.4 Litres - **Material:** Grease, Metal, Plastic - **Package information:** Tin ## Images ![WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... - Image 1](https://m.media-amazon.com/images/I/61gRmO22SaL.jpg) ![WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... - Image 2](https://m.media-amazon.com/images/I/71dCMOScI+L.jpg) ![WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... - Image 3](https://m.media-amazon.com/images/I/71rRAEL-EwL.jpg) ![WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... - Image 4](https://m.media-amazon.com/images/I/716o31AwodL.jpg) ![WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loose... - Image 5](https://m.media-amazon.com/images/I/71r9cQlxv+L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works fast on stuck bolts – a must-have in the toolbox *by C***A on 30 September 2025* I recently added the WD-40 Specialist Penetrant Spray to my toolkit, and it has already proven its value. I used it on a couple of stubborn, rusted bolts in my bike and an old garden tool, and within minutes the parts loosened up with very little effort. The spray penetrates quickly and doesn’t have the messy residue that some similar products leave behind. The nozzle gives a controlled spray, so you can target tight areas without wasting product. The smell is noticeable but not overpowering, and it doesn’t linger for long. One thing to keep in mind is that this is designed mainly as a penetrant and not as a long-term lubricant, so after freeing stuck parts it’s best to apply something else if you want ongoing protection. Overall, this is an effective, reliable product that does exactly what it promises. Definitely worth keeping on hand for household repairs, bikes, cars, or any mechanical projects. ### ⭐⭐⭐⭐⭐ Rust's Worst Nightmare, But Handle with Care! 🛠️💨 *by R***D on 4 July 2024* As a DIY enthusiast and occasional mechanic, I was eager to put WD-40's Specialist Penetrant Spray to the test. Let me tell you, this isn't your grandpa's WD-40! First off, the rapid penetration is no joke. I had a stubborn, rusted bolt that had been taunting me for weeks. A few sprays of this white wonder and voila! It surrendered faster than a politician's promise. 🔧💪 The precision straw is a game-changer. It allows you to target those hard-to-reach nooks and crannies with sniper-like accuracy. No more wasting product or accidentally lubricating your entire workbench! I've used it on everything from squeaky door hinges to seized engine parts, and it hasn't let me down yet. The versatility is impressive - it's like having a Swiss Army knife in a can. However, it's not all smooth sailing. The potent formula means you'll want to use this in a well-ventilated area. I made the mistake of using it in my enclosed garage once, and let's just say I felt like I was at a heavy metal concert minus the music. 🤘😵 Also, while it's tough on rust, it's equally tough on the environment. The warnings about aquatic toxicity are no joke, so be mindful of disposal and runoff. The price point is a bit higher than standard WD-40, but for its specialized performance, I'd say it's worth it. Just don't expect it to replace your entire toolbox - it's a specialist for a reason. In conclusion, if you're battling stubborn rust or need a high-performance penetrant, this is your new best friend. Just remember to respect its power - both in effectiveness and potential hazards. Use it wisely, and your rusty nemeses won't stand a chance! Just maybe wear gloves and open a window while you're at it. 🧤🪟 ### ⭐⭐⭐⭐⭐ Very effective product *by D***L on 29 August 2026* Very good stuff. It loosened a rusted nut and bolt on my scaffold tower. I’d tried everything to no avail but this worked really effectively. ## Frequently Bought Together - WD-40 Specialist Penetrant Spray - Professional-Grade Lubrication for Mechanics and Industrial Applications - 400ml - Rust-Busting Formula - WD-40 Specialist Silicone Spray Lubricant 400ml Can - Versatile All-Weather Protection for Extended Tool Life, Repels Moisture, Dust, and Grime - Smart Straw Applicator Included - WD-40 Multi-Use Smart Straw 450ml Spray Aerosol Can Clean Rust Lubricant, blue --- ## 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/48736745-wd-40-specialist-penetrant-spray-400ml-rust-penetrating-oil-spray](https://www.desertcart.jp/products/48736745-wd-40-specialist-penetrant-spray-400ml-rust-penetrating-oil-spray) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-27*