WD-40 Specialist Penetrant Spray, 400ml, Rust Penetrating Oil Spray for Loosening Rusted Nuts & Bolts, Hinges, Locks, and Gears, Rust Prevention, Smart Straw Included

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

Absolutely superb stuff this; never used it before today and it worked a treat. My usual go-to is standard WD40 then Wurth Rost Off Ice - but ran out of that and the prices have gone silly. Thought I'd try something different and glad I did... Needed to change all the front suspension arms and track rod ends on my 2002 BMW 540i this morning whilst I was able to use my pals ramps; got the car up, wheels off, soaked all the ball joints, nuts and large bushes, nuts & bolts and left them to soak whilst I made a brew etc... Came back; all bolts undid and nuts; the ball joints were easy enough to pop out without having to resort to violence, ball joint splitters/forks or heat etc - yes they took a few whacks with a peacemaker; but they came out without any issues Very impressed and would highly recommend

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.

WD40 Penetration oil does the job on rusted nuts and bolts, it is designed to penetrate deep into the bolt to help release and breakdown corrosion and seeps really well and works fast, it can also help with water resistance to prevent further corrosion and I've been using the WD-40 brand for years, with WD-40 you know what you're buying, you know the quality is some of the best on the market, the flexy tube and wide spray is extreamly useful in those tight situations, you might see cheaper oils on the market, but if you want quality then this is the spray that you need.

Good effective product. Good value for money.

Works good better than standard wd40

Easily the best WD-40 variant I’ve used. It loosens rusted bolts and seized parts much faster than the standard version. I was a bit sceptical at first and thought it might be a gimmick, but it genuinely makes a difference—especially when dealing with stubborn fixings. It’s saved time on jobs and helped avoid snapping bolts, which is a big plus when you’re working on older or corroded fittings. The smart straw is also handy for getting into tighter areas without making a mess. So far, I haven’t come across anything it hasn’t helped loosen. Overall, definitely worth the extra cost over the regular WD-40 if you regularly deal with seized or rusted components.

When one comes across a screw or bolt that won't budge/move this is the product to have around. The merchandise arrived on time. It was as per the seller’s description, as well as per my requirements. The packaging was adequate for transport. The product I had ordered, has proven to be just right for the use intended. My overall experience, with this purchase has been very satisfactory. It is a good product to have available.