--- product_id: 3925708 title: "Penetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz." brand: "wd-40 specialist" price: "€ 18.01" currency: EUR in_stock: true reviews_count: 9 category: "Wd 40 Specialist" url: https://www.desertcart.hr/products/3925708-penetrant-with-smart-straw-penetrant-for-metal-rubber-and-plastic store_origin: HR region: Croatia --- # Smart Straw sprays 2 ways Penetrates rust 2x faster Leaves protective anti-corrosion layer Penetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz. **Brand:** wd-40 specialist **Price:** € 18.01 **Availability:** ✅ In Stock ## Summary > 🛠️ Unlock the power of precision and speed—don’t get stuck behind the rust! ## Quick Answers - **What is this?** Penetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz. by wd-40 specialist - **How much does it cost?** € 18.01 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/3925708-penetrant-with-smart-straw-penetrant-for-metal-rubber-and-plastic) ## 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 - • **Break Free Fast:** Industrial-strength formula acts quickly to free stuck nuts, bolts, and locks. - • **Multi-Material Mastery:** Safe and effective on metal, rubber, and plastic parts—versatility that professionals demand. - • **Precision or Power Spray:** Innovative Smart Straw lets you switch between targeted narrow streams and broad coverage effortlessly. - • **Low Odor, High Performance:** VOC compliant and low-odor formula keeps your workspace fresh without sacrificing strength. - • **Trusted by Experts Worldwide:** Backed by WD-40’s legacy, delivering reliable, professional-grade corrosion protection every time. ## Overview 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 precise 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, it’s trusted globally for industrial and professional use to free stuck nuts, bolts, locks, and more. ## Description Less time fixing and more time enjoying. WD-40 Specialist Penetrant makes it easy to quickly get the job done right so you bask in your accomplishment and move on. Professional-grade WD-40 Specialist Penetrant formula works fast to break the toughest jams and protects parts from future rust & corrosion. Leaves a thin protective layer that prevents future corrosion without attracting dust or other particles. Designed with safety in mind: Low odor formula, VOC compliant in 50 states. Backed by the excellence of WD-40, the world leader in residential and commercial lubricants. Effective in breaking bonds for most materials - metal, rubber, plastic and more. Penetrates up to 2x faster than the competition* - Penetrates rust to free up stuck, frozen, or seized equipment and parts - Safe to use on metal, rubber and plastic parts - Ideal for use on nuts, bolts, threads and locks - 50-state VOC compliant. *Test Lab: Fred Cuneo (3rd Party); Nail Climb Test; Test date: 03/2021. **Test Lab: WD-40 Co. Technical Center (Pine Brook, NJ); ASTM B117; Test date: 02/2021. Review: 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. Review: 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. ## Features - Everything you need in a professional-grade Penetrating Lubricant: Low-odor, Strong, Fast, and Targeted. WD-40 Specialist Penetrant with a Smart Straw to Spray 2 Ways - Fast-acting formula breaks rust and corrosion that jam up parts and leaves behind a protective layer that prevents future corrosion - If it's stuck, WD-40 Specialist Penetrant can help - nuts, bolts, threads, locks, chains, and more - Target the smallest crevices between threads or cover large areas as easily with the Smart Straw sprays 2 ways: Regular or Precise, Wide or Narrow, Broad or Targeted - Experts around the world trust WD-40 Specialist formula to deliver professional grade protection every single time ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00631GQGW | | Best Sellers Rank | #56 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Industrial Lubricants | | Brand Name | WD-40 Specialist | | Container Type | Can | | Customer Reviews | 4.8 4.8 out of 5 stars (18,148) | | Flash Point | 40 Degrees Celsius | | Global Trade Identification Number | 30079567300008 | | Included Components | WD-40 Specialist Rust Release Penetrant Spray with Blu Torch and SMART STRAW SPRAYS 2 WAYS, 11 OZ | | Item Form | Spray | | Item Type Name | WD40 300004 Specialist Penetrant Spray Smart Straw - 11 oz. | | Item Weight | 11 Ounces | | Liquid Volume | 11 Fluid Ounces | | Manufacturer | The WD-40 Company | | Material | Plastic | | Recommended Uses For Product | Industrial | | Specific Uses For Product | Prevent Corrosion | | UPC | 079567300007 | | Unit Count | 1.0 Count | | Warranty Description | As Labeled | ## Product Details - **Brand:** WD-40 Specialist - **Item Weight:** 11 Ounces - **Liquid Volume:** 11 Fluid Ounces - **Material:** Plastic - **Package Information:** Can ## Images ![Penetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz. - Image 1](https://m.media-amazon.com/images/I/71ZC7ay+mHL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is this formula very different from original wd 40 (which didn't work on my rusted outdoor light fixture screws)?** A: This version is better at loosening rusted parts. But you have to remember it take time to creep into the threads and work. You can not just spray it on and start unscrewing, I have had severely rusted fittings that I sprayed every day for a week before they busted loose. There is no miracle product that you can spray and go instantly. **Q: What makes it better than standard wd 40 for rusted bolt and screw removal? Also does it work better or worse with a torch compared to original wd 40** A: No idea what makes it better, if you spray a locked up bolt/nut wait 5-10 min then remove it. I’ve had very good luck with it **Q: Could this be used to release rust and be followed up an application of WD-40 long term corrosion inhibitor?** A: This product released rust. but I don't believe WD-40 long term corrosion inhibitor is any better as it only lasts one year outdoor use, I used than 3M or NAPA products those are more permanent inhibitors (more like paint) **Q: will this remove rust on a table saw table?** A: Not by itself but if you use steel or brass wool with it, it will help remove rust ## Customer Reviews ### ⭐⭐⭐⭐⭐ Industrial Strength Penetrant That Gets Into the Tough Spots Every Time *by J***N on April 12, 2026* 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. ### ⭐⭐⭐⭐⭐ Excellent product and allow time for reaction with stuck parts by repetitive applications. *by R***E on January 2, 2026* 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. ### ⭐⭐⭐⭐⭐ Good, Reliable, WD 40. *by R***S on March 28, 2026* Works great, everytime. No disappointments here. ## Frequently Bought Together - WD-40 Specialist Penetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz. - WD-40 Specialist Silicone Lubricant with SMART STRAW SPRAYS 2 WAYS, 11 OZ - WD-40 Specialist White Lithium Grease Spray with SMART STRAW SPRAYS 2 WAYS, 10 OZ --- ## 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.hr/products/3925708-penetrant-with-smart-straw-penetrant-for-metal-rubber-and-plastic](https://www.desertcart.hr/products/3925708-penetrant-with-smart-straw-penetrant-for-metal-rubber-and-plastic) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-25*