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🛠️ Unlock stuck parts with precision and power — don’t get left rusting behind!
WD-40 Specialist Penetrant with Smart Straw is a professional-grade, fast-acting lubricant spray designed to 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, leaving a protective layer that prevents future corrosion. Low odor and VOC compliant, this 11 oz aerosol comes in a convenient 6-pack, trusted globally by professionals for industrial and automotive use.











| ASIN | B00631GP9A |
| Best Sellers Rank | #22,869 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #41 in Power Tool Lubricants |
| Brand | WD-40 Specialist |
| Brand Name | WD-40 Specialist |
| Container Type | Can |
| Customer Reviews | 4.8 out of 5 stars 19,104 Reviews |
| Flash Point | 64 °C |
| Global Trade Identification Number | 10079567300004 |
| Included Components | SMART STRAW SPRAYS |
| Item Form | Spray |
| Item Highlight | Penetrant for Metal, Rubber & Plastic Threads, Locks, Nuts, Industrial Strength for Automotive & Heavy-Duty Construction |
| Item Weight | 11 ounces |
| Liquid Volume | 11 |
| Manufacturer | The WD-40 Company |
| Material | Metal,Plastic |
| Model Number | 300004 |
| Number of Items | 6 |
| Number of Packs | 6 |
| Package Information | Can |
| Part Number | 300004 |
| Recommended Uses For Product | Industrial |
| SAE J300 Viscosity Grade | 0W |
| Specific Uses For Product | Party |
| UPC | 100453345373 |
| Unit Count | 6 Cans |
| Viscosity | 0w |
A**K
Perfect for any rusty or stubborn screws and bolts.
Is there anything WD-40 does not resolve? Used this on a couple of tire bolts that were ver stubborn. Sprayed, let is rest for a few minutes and they came off easily. Great product. Great value for the money.
J**N
Industrial Strength Penetrant That Gets Into the Tough Spots Every Time
This WD-40 Specialist Penetrant is a rock-solid 5-star product that belongs in every garage, shop, and toolbox. The fast-acting formula works quickly on rusted bolts, frozen nuts, seized locks, and corroded threads that would otherwise require a breaker bar and a lot of frustration. It penetrates deep into tight threads and hard-to-reach areas, breaking up rust and corrosion without damaging the surrounding metal, rubber, or plastic—which is a big deal when working on delicate or older components. The Smart Straw applicator is excellent for switching between a broad spray and a precise, targeted stream exactly where you need it, with no straw to lose track of. Whether I'm working on the RV, vehicles, or shop equipment, this penetrant has bailed me out on more than a few stubborn fasteners that nothing else would budge. Industrial strength performance in a convenient aerosol can—it does exactly what it promises and does it well every single time. Highly recommended.
M**B
Love this stuff!
I am so please with this WD-40. The way they added the straw to use and or the spray genius. On top of all that it works better than ever. Try this you will not be disappointed. The price e is good too for what your getting.
S**S
Works perfectly, but a little goes a long way!
I am giving this WD-40 Specialist Penetrant a full 5 stars. It works very well on my doors and cabinet doors to keep the hinges moving smoothly. You really only need a tiny amount because a little goes a very long way! My only minor issue is the size of the product. Because you use so little of it at a time, the 11 oz can is almost too much for basic household tasks. If there was a smaller can available for a lower price, I definitely would have bought that instead. Overall, it is an excellent and highly effective product to have around the house. Pros: Works perfectly on squeaky doors and cabinets. Very fast-acting and a little goes a very long way. Cons: The 11 oz can is quite large for basic needs; a smaller, cheaper size would be ideal.
G**.
Good product. WD-40 has always been good!
This is the go-to when you have stuck bolts and/or nuts. So, that's why I got it. It's always to have it in the garage for the unexpected projects
D**H
Makes the squeak quiet
Perfect
E**V
WD40 Must have thing at home.
It is really useful thing! And I just realized that there are many of WD40 products. So I am about to order a different one with silicone for my computer chair.
R**N
Great product
As advertised
M**Z
A buen precio
Buen producto
Trustpilot
5 days ago
1 week ago