--- product_id: 210072882 title: "Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 9-Cans" brand: "cosmoline direct, llc" price: "€ 363.90" currency: EUR in_stock: true url: https://www.desertcart.fr/products/210072882-cosmoline-rp-342-black-rust-preventive-spray-military-grade-9 store_origin: FR region: France --- # Fast 25-min dry time Durable black wax coating Military-grade rust defense Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 9-Cans **Brand:** cosmoline direct, llc **Price:** € 363.90 **Availability:** ✅ In Stock ## Summary > 🛠️ Protect like a pro — Rust doesn’t stand a chance! ## Quick Answers - **What is this?** Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 9-Cans by cosmoline direct, llc - **How much does it cost?** € 363.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/210072882-cosmoline-rp-342-black-rust-preventive-spray-military-grade-9) ## Best For - cosmoline direct, llc enthusiasts ## Why This Product - Trusted cosmoline direct, llc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleek Matte Black Finish:** Conceals imperfections with a non-tacky, chip-resistant petroleum wax coating. - • **Long-Lasting, One-Coat Shield:** Single application guards metal surfaces for years against salt, chemicals, and harsh weather. - • **Versatile Industrial & DIY Use:** Perfect for vehicles, machinery, firearms, marine gear, and thousands more applications. - • **Fast-Drying, Ready in 25 Minutes:** Spend less time waiting and more time protected with rapid curing technology. - • **Unmatched Military-Grade Protection:** Trusted by U.S. Armed Forces since WWII for ultimate rust prevention. ## Overview Cosmoline RP-342 is a military-grade, fast-drying rust preventive spray delivering a durable black petroleum wax coating that protects metal surfaces indoors and outdoors for years. Trusted since WWII, it offers a tough, chip-resistant matte finish that withstands salt spray, extreme temperatures, and harsh environments with just one coat. Ideal for vehicle undercoating, heavy machinery, firearms, and countless industrial or DIY applications. ## Description Military-Grade Rust Prevention Modeled after Military Specifications: MIL-PRF-16173, Grade 4 and MIL-C-83933. Application: IMPORTANT #1: Make sure your surface is clean and dry (not oily or greasy) to ensure best possible adhesion. IMPORTANT #2: RP-342 is a heavily-concentrated rust preventive. For best results, each spray can should be shaken vigorously for about 2 minutes to ensure a uniform coat. The aerosol cans should also be shaken intermittently during longer application sessions. GENERAL INSTRUCTIONS - Spray a generous, even coating on your surface and let dry. While a single coating will provide exceptional protection, additional coats can be applied if desired. If applying multiple coats, always let previous coats dry completely before applying the next coat. Ideally, it’s always preferable and recommended to apply over a non-rusted surface, however, RP-342 can be applied over moderate surface rust. RP-342 will prevent surface rust from spreading. RP-342 should not be applied over flaking or pitted rust…..these advanced types of rust should be treated prior to applying RP-342. The typical first application dry film thickness is 2.0 Mils (51 Microns). Common Applications Include (but are not limited to): - Vehicle undercarriage / undercoating (cars, buses, trucks, etc.) - the most popular application! - Parts & equipment storage - Overseas transportation - Heavy machinery & equipment (storage & in-use applications) - Packaging - Dies, molds, lathes, shafts and beams - Offshore drilling equipment, platforms & infrastructure - Farm implements - Boat shafts and propellers - Marine fittings - Rifle & other firearms preservation / storage - Garden tools & lawn mower blades - 1,000s of applications! Reliably protects any surface that might rust on you! ## Features - OUR STRONGEST, LONGEST-LASTING & FASTEST-DRYING Rust Preventive Aerosol, PERIOD! 1-coat can reliably protect any metal, steel, or iron surface (parts, equipment, tools, machinery, etc.) for Years!.....indoors or outdoors. - DURABLE & TOUGH – Will not crack, craze, blister, run or “wash off”. RP-342 produces a dry-to-the-touch (non-tacky), amber, BLACK petroleum wax coating (perfect for concealing unsightly surfaces) that stands up to long-term salt spray, extreme temperatures and other harsh environments. - EASY-TO-APPLY: Just spray onto a dry surface, dries in about 25 minutes; You’re Done! - TRUSTED SINCE WWII – has been widely used & trusted by the U.S. Armed Forces, government agencies, commercial companies, and DIYers/consumers for generations. - 1,000s of APPLICATIONS across commercial and private industries. Vehicle undercoating is one of the most popular applications. Easily stands up to road salt, chemicals, road debris and won’t wash off like many other undercoating products. One application/coating can protect for years. ## Technical Specifications | Specification | Value | |---------------|-------| | Age Range Description | Adult | | Asin | B0888PYMWZ | | Best Sellers Rank | #56,017 in Automotive (See Top 100 in Automotive) #190 in Care Corrosion & Rust Inhibitors #887 in Dehumidifiers | | Brand Name | Cosmoline Direct, LLC | | Color | Black | | Color Code | [BLACK] | | Container Type | Can | | Coverage | Long-term rust protection with multiple coat capability | | Customer Reviews | 4.7 4.7 out of 5 stars (216) 4.7 out of 5 stars | | Dry Time In Hours | 2 | | Finish Type | Matte | | Full Cure Time | 25 minutes | | Indoor Outdoor Usage | Indoor, Outdoor | | Is Waterproof | False | | Item Form | Aerosol | | Item Volume | 12 fluid ounces | | Manufacturer | Flywheel Distribution, LLC | | Model Number | RP-342 | | Paint Type | Spray | | Part Number | 342-1032-9 | | Size | 12 Ounce (Pack of 9) | | Special Features | Chip Resistant, Fast-Drying | | Specific Uses For Product | Vehicle Undercoating, Car Undercoat, Truck Undercoating, Rust Prevention, Rust Preventive | | Surface Recommendation | Metal | | Unit Count | 108 Ounce | ## Product Details - **Brand:** Cosmoline Direct, LLC - **Color:** Black - **Finish Type:** Matte - **Indoor/Outdoor Usage:** Indoor, Outdoor - **Item Volume:** 12 fluid ounces - **Paint Type:** Spray - **Size:** 12 Ounce (Pack of 9) - **Special Feature:** Chip Resistant, Fast-Drying - **Specific Uses For Product:** Vehicle Undercoating, Car Undercoat, Truck Undercoating, Rust Prevention, Rust Preventive - **Surface Recommendation:** Metal ## Images ![Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 9-Cans - Image 1](https://m.media-amazon.com/images/I/51DyRGK+acL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Cosmoline RP-342 Black Rust Preventive Spray (Military-Grade) 9-Cans - 2 Pcs 2XAerosol Nozzle w/ 19.69in. 360 Degrees Extension Hose for Male Stem Spray Cans Fluid Auto Car Nozzle Film 4.5mm Extension H3C9 --- ## 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.fr/products/210072882-cosmoline-rp-342-black-rust-preventive-spray-military-grade-9](https://www.desertcart.fr/products/210072882-cosmoline-rp-342-black-rust-preventive-spray-military-grade-9) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-11-11*