Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml

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.

This worked brilliantly on seized suspension bolts that hadn't moved in years. The Smart Straw is very useful for directing the spray exactly where it's needed and the penetrating action is noticeably better than standard WD-40. Highly recommended.

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. 🧤🪟

Really good stuff! Loosened brake carrier bolts which can be notoriously seized

A good product beats ordinary WD40. Works fast, read label as can be harmful to eyes so wear appropriate safety kit.

Good

Worked well on seized bolts and rusty hinges. The Smart Straw makes it easy to apply accurately without wasting product. A useful addition to any toolbox.

Have always used wd40 anyway but this is my new favourite, works very well on everything, should last a long time too.