

🛠️ Unlock stuck parts and keep your gear corrosion-free like a pro!
WD-40 Specialist Penetrant with Smart Straw is an 11 oz industrial-strength spray designed to quickly break rust and corrosion on metal, rubber, and plastic parts. Featuring a dual-mode Smart Straw for targeted or broad application, it penetrates up to twice as fast as competitors and leaves a protective layer to prevent future corrosion. Low-odor and VOC-compliant, this professional-grade formula is trusted globally for maintaining nuts, bolts, locks, and more.











| ASIN | B00631GQGW |
| Best Sellers Rank | #118 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Industrial Lubricants |
| Brand | WD-40 Specialist |
| Customer Reviews | 4.8 4.8 out of 5 stars (17,276) |
| Date First Available | May 25, 2017 |
| Flash Point | 40 Degrees Celsius |
| Global Trade Identification Number | 30079567300008 |
| Is Discontinued By Manufacturer | No |
| Item Form | Spray |
| Item Weight | 11 ounces |
| Item model number | 300004 |
| Liquid Volume | 11 Fluid Ounces |
| Manufacturer | The WD-40 Company |
| Manufacturer Part Number | 300007 |
| Material | Plastic |
| Model | 300004 |
| Number of Items | 1 |
| Package Information | Can |
| Product Dimensions | 24 x 8 x 8 inches |
| Recommended Uses For Product | Industrial |
| Specific Uses For Product | Prevent Corrosion |
| UPC | 079567300007 |
| Unit Count | 1.0 Count |
R**E
Excellent product and allow time for reaction with stuck parts by repetitive applications.
RE: WD-40 Specialist Penetrant With Smart Straw, Penetrant For Metal, Rubber, And Plastic Threads Excellent product and by applying repeititively for several days, saved a dozen expensive locks for re-use saving lots of money. Also works really well on loosening up manifold bolts to remove boat manifold bolts in order to remove manifold gaskets and then install new gaskets able to save all bolts. Will use to loosen boat control cables to prevent stretching and destroying them as well saving lots of money.
A**A
Excellent Lubricant for Household Projects
This lubricant works very well for any of those pesky home projects that need a bit of loosening and oiling and is a GREAT price.
E**S
Smart Straw, Smarter Fix
Smart Straw, Smarter Fix I’ve used a lot of penetrating oils over the years, and this WD-40 Specialist Penetrant really stood out as one of the better ones. The “Smart Straw” design makes a surprising difference—you can flip it down for a wide spray or snap it up for a precise stream, which saves both time and waste. I used it on a stubborn garden hose fitting, some squeaky hinges, and even a rusted nut on my lawnmower, and in each case it loosened things up quickly. The formula seems to work fast, cutting through rust and corrosion so you don’t have to force anything and risk breaking parts. Another big plus is its versatility. I felt comfortable using it not just on metal, but also around plastic and rubber parts where I’d normally hesitate with harsher sprays. It dries fairly cleanly and doesn’t leave a sticky residue that attracts dirt, which is often a problem with cheaper sprays. The can size feels generous and should last through many household and garage projects. If I had to nitpick, the smell is strong—like most products in this category—so I recommend using it outdoors or in a ventilated area. But in terms of performance, it does exactly what you want: frees things up without fuss. Bottom line: A reliable, fast-acting penetrant that’s made my life easier on everything from locks to mower parts. The Smart Straw alone makes it worth choosing over generic brands.
D**T
The Best Stuff
A bigger bottle than expected, works very well, and has a strawberry for direct sprays. The WD-40 is the name brand stuff, very good quality.
A**N
one of the best penetrating oils
Works well for its intended purpose. Very helpful product for automotive work. Helps break tight suspension nuts/bolts loose on 20 year old vehicles. Makes loosening highly torqued fasteners much easier, which helps avoid breaking bolts, or stripping. just spray a little on and let it sit for a couple minutes and it will make work easier. Highly recommend.
S**N
Fast, effective, and affordable
Works great and acts fast. I used it to loosen old caster wheels that had been sitting outside, and it broke them free easily. Cheap, reliable, and does exactly what it should.
F**D
Good price for this and it last forever
Works good and not messy but it does spray a hard stream which is good depending on what your doing. I used it for a seatbelt latch and it fixed it.
D**R
Awesome 👍🏻
Great product and super useful. Awesome quality and easy to use..
M**Z
Buen producto
Trustpilot
1 week ago
2 months ago