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WD-40

WD-40 is a versatile multi-use product consisting of a unique blend of lubricants, designed to displace water, prevent rust and corrosion, penetrate surfaces, and remove soil and grime.^[1] Developed in 1953 by the Rocket Chemical Company in San Diego, California, the formula was perfected after 40 attempts, with its name standing for "Water Displacement, 40th formula."^[2] It was initially created as a rust-preventive solvent for the aerospace industry and first used commercially in 1953 by Convair to protect the outer skin of the Atlas missile from rust and corrosion.^[3] The product gained widespread consumer availability in 1958 when it appeared on store shelves in San Diego in aerosol cans, marking the beginning of its transformation from an industrial tool to a household essential.^[2] Over the decades, WD-40 has expanded its applications to more than 2,000 documented uses, including lubricating moving parts, loosening rusted bolts, protecting metal from moisture, and cleaning various surfaces, though it is not recommended for high-friction or rubber components without wiping excess.^[1] Its proprietary formulation, which remains a closely guarded secret, includes refined mineral spirits as a primary component but excludes fish oil, contrary to some urban legends.^[1] Founded by Norm Larsen and partners as a small operation with three employees, the Rocket Chemical Company renamed itself the WD-40 Company in 1970 and went public in 1973, experiencing a 61% stock surge on its NASDAQ debut.^[3] Today, the WD-40 Company operates globally, with products distributed in over 176 countries as of 2025, and continues to innovate through acquisitions like 3-IN-ONE oil in 1995 and expansions into specialized lines such as WD-40 Specialist.^[3] The brand's enduring popularity stems from its reliability in diverse scenarios, from automotive maintenance to disaster recovery efforts, such as during Hurricane Carla in 1961.^[3]

History

Invention and Early Development

In 1953, the Rocket Chemical Company, a fledgling firm with a staff of three, was established in San Diego, California, to develop rust-prevention solvents and degreasers tailored for the aerospace industry.^[2] The company's initial focus was on creating a water-repelling agent to address corrosion challenges in high-stakes environments, initially for preventing rust on US Navy ship gears, marking the origins of what would become WD-40.^[4]^[2] The formula was adapted to safeguard the outer skin of Convair's Atlas missiles against rust and corrosion, a critical need during the early Cold War era when missile reliability was paramount.^[2] Convair became the first entity to employ WD-40 for its intended missile protection purpose in 1953.^[2] Early testing involved applying the product to missile components to displace water and prevent moisture-induced failures, such as electrical shorts or structural degradation, during prolonged storage and pre-launch preparations.^[2] This aerospace application underscored its role in ensuring the integrity of intercontinental ballistic missiles amid humid coastal conditions in San Diego.^[4] The product's name, WD-40, originates from "Water Displacement, 40th formula," commemorating the successful iteration after 39 prior attempts failed to yield an effective rust-preventative compound.^[2] These experiments, conducted in a modest lab setting, involved iterative refinements to achieve optimal water-repelling properties without compromising the underlying materials.^[4] Attribution for the invention varies between accounts: company records credit Norman B. Larsen, the founder of Rocket Chemical Company, with directing its development.^[2] In contrast, a detailed historical analysis by Iris Engstrand, a professor and co-editor of the Journal of San Diego History, attributes the formula's creation to chemist Iver Norman Lawson, who perfected it through evening experiments in his San Diego garage and received a modest $500 bonus for his efforts.^[4]

Commercial Launch and Growth

WD-40's commercial launch began in 1958, when the Rocket Chemical Company introduced the product in aerosol cans to San Diego-area stores, making it available for both industrial and consumer applications, primarily focused on rust prevention in the aviation and marine sectors. The initial industrial customer was Convair, which used it to protect the outer skin of Atlas missiles from corrosion and rust. This targeted release marked the transition from laboratory development to practical deployment, with the product first appearing on store shelves in San Diego that year.^[3]^[2] Growth accelerated following a key catalyst in 1961: the fulfillment of the first full truckload order to assist victims of Hurricane Carla along the U.S. Gulf Coast, where it was employed to recondition flood-damaged vehicles and equipment, boosting its reputation among everyday users.^[2]^[3] The company's expansion continued in the late 1960s, with sales reaching all 50 U.S. states by 1969, prompting a rebranding from Rocket Chemical Company to WD-40 Company to emphasize its flagship product. In 1973, it went public on the NASDAQ exchange under the ticker symbol WDFC, experiencing a 61% stock price increase on its debut day, which fueled further expansion. International markets followed in the 1970s, with licensing agreements and distribution networks established in Europe and Asia, transforming WD-40 into a global brand. In recognition of its enduring aerospace legacy—originally purposed for missile protection—the product was inducted into the International Air & Space Hall of Fame in 2014.^[3]^[5]

Formulation and Composition

Key Ingredients

The formula for WD-40 Multi-Use Product is a closely guarded trade secret, never patented to prevent public disclosure of its composition.^[6] The original handwritten recipe, dating back to the product's development in the 1950s, has been stored in a secure bank vault in San Diego since 2018, accessible only to a limited number of company executives.^[7] While exact proportions remain confidential, reverse-engineered approximations based on safety data sheets and official disclosures provide a general breakdown of its components.^[8] The primary ingredients consist of 45-50% low vapor pressure (LVP) aliphatic hydrocarbon (refined mineral spirits or petroleum distillates), serving as the solvent base.^[8] Additional aliphatic hydrocarbons make up 10-<25% of the formula, contributing to the solvent action that displaces water and dissolves residues such as rust, grease, and adhesives.^[8] Petroleum-based base oil accounts for <35%, providing temporary lubrication by forming a protective film on metal surfaces.^[8] The aerosol version includes 2-3% carbon dioxide as the propellant, though regional formulations may vary slightly in this component.^[8] The remaining ingredients (trade secret) include corrosion inhibitors that help prevent rust formation.^[1] These components work synergistically: the hydrocarbons penetrate and clean by displacing moisture and breaking down contaminants, while the base oil ensures short-term lubrication without attracting dirt.^[1] Notably, despite common misconceptions, WD-40 does not contain fish oil, silicone, or kerosene.^[9] As a safety consideration, WD-40 is classified as an extremely flammable aerosol under GHS standards, requiring storage away from heat sources and ignition.^[8] It contains no ozone-depleting substances, aligning with environmental regulations such as the Montreal Protocol.^[10]

Manufacturing and Regional Variations

WD-40 Multi-Use Product is produced through a network of over 20 third-party contract manufacturing organizations (CMOs) strategically located in North America, South America, Europe, Asia, and Australia to blend the proprietary ingredients—primarily hydrocarbons, base oils, and additives—under strictly controlled conditions before filling aerosol cans with propellant.^[11]^[12] This decentralized approach ensures efficient distribution while maintaining consistency across global production sites. The blending occurs in specialized facilities that adhere to rigorous quality standards, with the company employing enterprise quality management systems to verify that each batch meets exact specifications regardless of location.^[11] The product is packaged in standard aerosol cans ranging from 8 to 14 ounces, designed for easy dispensing. In 2005, the WD-40 Company introduced the Smart Straw applicator, a permanently attached dual-function nozzle that allows users to switch between a precision stream for targeted application and a wide spray for broader coverage, reducing the risk of losing the straw and enhancing usability.^[13] Regional variations in the formula are primarily driven by differing environmental regulations, particularly those governing volatile organic compounds (VOCs). In the United States, the formulation has been adjusted to comply with 50-state VOC limits, including a key change in the mid-1990s that reduced VOC content through modifications to the hydrocarbon blend.^[14] The European formulation, compliant with REACH regulations, consists of 60–80% hydrocarbons C9–C11 (n-alkanes, iso-alkanes, cyclics <2% aromatics) and 1–5% base oil, incorporating lower percentages of aromatic hydrocarbons to align with stricter emissions standards.^[15] Australian versions similarly adhere to environmental protection guidelines with reduced aromatic content. These adaptations maintain equivalent efficacy in water displacement, lubrication, and rust prevention across markets. The core formula of WD-40, developed in 1953 and protected as a trade secret rather than patented, has remained fundamentally unchanged to preserve its proven effectiveness.^[16] However, the propellant was updated in 1996 from hydrocarbon-based liquefied petroleum gas to carbon dioxide to lower VOC emissions and flammability risks in compliance with evolving regulations.^[17] This shift, prompted by California VOC limits, exemplifies ongoing quality control efforts to balance product integrity with regulatory demands while upholding the original 40th-attempt formulation's legacy.^[17]

Uses and Applications

Primary Functions

WD-40 Multi-Use Product primarily functions as a water displacer, lubricant, cleaner, and corrosion inhibitor, derived from its formulation of solvents, oils, and additives.^[8] These properties enable it to address common issues in mechanical and maintenance applications by penetrating surfaces and providing protective actions.^[1] One of its core mechanisms is water displacement, where the formula penetrates metal surfaces and repels moisture, preventing corrosion by forming a thin protective barrier that drives out water from crevices and electrical contacts.^[1] This capability, central to its original development as the 40th attempt (WD-40) to create a water-displacing agent, ensures dry conditions on treated areas to inhibit rust formation.^[2] As a lubricant, WD-40 reduces friction on moving parts such as hinges and gears through its blend of light lubricating oils, offering short-term lubrication that eases operation but is not intended as a replacement for long-lasting greases, as it evaporates relatively quickly.^[1] The company's specialized products are recommended for extended lubrication needs, highlighting WD-40's role in temporary friction reduction.^[18] In cleaning and degreasing, the solvent-based composition dissolves substances like adhesives, tar, gum, and light rust via chemical action, allowing removal without abrasive methods by breaking down residues on surfaces.^[19] This solvent penetration facilitates the loosening and elimination of contaminants, contributing to the product's soil removal properties.^[1] For rust prevention, WD-40 inhibits oxidation on ferrous metals through incorporated corrosion inhibitors that create a protective film, safeguarding against environmental degradation after moisture displacement.^[8] These agents actively suppress rust development on exposed metal parts.^[1] The product's versatility extends to non-food applications on metals, plastics, rubber, and wood, where it maintains efficacy across an operating temperature range of -60°F to 300°F without causing damage in standard uses.^[20] This broad compatibility stems from the balanced formulation of its key ingredients, including aliphatic hydrocarbons and mineral spirits that support multiple surface interactions.^[1]

Common Applications

WD-40 Multi-Use Product is widely applied in industrial settings to loosen rusted bolts in machinery, where its penetrating properties allow it to break through corrosion on seized components such as valves and fittings.^[19] It also protects tools from rust by forming a thin protective film after cleaning, extending the lifespan of equipment like drills and saws in workshops.^[21] Additionally, it cleans electrical contacts in aviation and automotive repair by displacing moisture and removing oxidation from connectors, ensuring reliable performance in critical systems.^[19] In household applications, WD-40 effectively removes crayon marks from walls and other surfaces by dissolving the wax without damaging paint or finishes.^[19] It squeak-proofs door hinges and cabinet hardware through lubrication that reduces friction and prevents future noise.^[21] For cleaning, it polishes stainless steel appliances by wiping away fingerprints and grime, restoring shine without streaking.^[21] It further prevents rust on bicycles by coating chains and frames, particularly in humid environments.^[19] Automotive uses include dislodging stuck license plates by penetrating the corroded screws holding them in place.^[19] It treats squeaky brakes by lubricating caliper pins and sliding mechanisms to eliminate noise and improve operation.^[21] WD-40 also removes road tar from vehicle exteriors, such as bumpers and undercarriages, by breaking down the adhesive residue for easy wiping.^[19] In marine and outdoor contexts, WD-40 protects boat fittings from saltwater corrosion by displacing moisture and inhibiting rust on hardware like cleats and winches.^[19] It maintains zippers on tents and outdoor gear by lubricating the tracks to prevent jamming in wet conditions.^[19] Official endorsements highlight its utility in high-stakes environments, including use by NASA for space shuttle maintenance, where it served as a temporary corrosion preventive compound applied to areas like the rudder speed brake and wing leading edges, surviving multiple mission cycles.^[22] The company documents over 2,000 practical uses based on end-user reports, underscoring its versatility across sectors.^[23]

Myths and Misconceptions

One persistent myth surrounding WD-40 is that its formula contains fish oil, purportedly responsible for its slippery texture and even its ability to attract fish when used on fishing gear. This urban legend likely originated from the product's faint fishy odor and anecdotal reports of enhanced fishing success, but the WD-40 Company has repeatedly debunked it, stating that the product contains no animal-derived ingredients whatsoever. Instead, WD-40 is composed primarily of petroleum distillates, such as aliphatic hydrocarbons, making it a synthetic, non-animal-based formulation.^[1]^[24] Another common misconception is that WD-40 serves as a true, long-lasting lubricant suitable for all mechanical applications, including high-load or continuous-use scenarios like bicycle chains. In reality, while WD-40 provides temporary slipperiness through its light petroleum oils, the majority of its formula consists of volatile solvents that evaporate quickly, leaving minimal residual lubrication. The company itself clarifies that it excels at water displacement, penetration, and cleaning but is not designed for sustained lubrication under heavy loads; for bike chains, dedicated chain-specific greases or lubes are recommended to prevent accelerated wear and attract less dirt.^[1]^[25] WD-40 is often mistakenly believed to be safe and effective for lubricating rubber components, such as seals or gaskets, without causing harm. However, prolonged exposure can degrade certain types of rubber, leading to swelling, cracking, or loss of elasticity due to its petroleum-based solvents, which act as penetrants rather than protectants. Manufacturers advise against ongoing contact with rubber, recommending silicone-based alternatives for such uses to avoid material breakdown over time.^[26]^[27] Additional myths portray WD-40 as a versatile disinfectant capable of killing viruses and bacteria, a fix for complex computer issues beyond surface cleaning, or food-safe for direct contact in cooking or preparation. None of these hold true: WD-40 lacks antimicrobial agents and is not registered as a disinfectant by regulatory bodies like the EPA, making it ineffective against pathogens. For electronics, its conductive residues and dust-attracting properties can exacerbate problems rather than resolve them, with experts suggesting specialized contact cleaners instead. Regarding food safety, the product contains petroleum distillates that are toxic if ingested and unsuitable for any direct food contact, potentially contaminating surfaces or items.^[1]^[28]^[29] The cultural proliferation of these misconceptions stems largely from viral email chains and online lists claiming "2,000 uses" for WD-40, which have circulated since the 1990s and include unverified, exaggerated, or outright unsafe suggestions like applying it to skin for repelling insects or using it in food preparation. While the company acknowledges over 2,000 user-reported applications, many in these lists promote misuse that can lead to health risks, material damage, or inefficacy, underscoring the importance of adhering to official guidelines rather than anecdotal hype.^[30]^[31]

The WD-40 Company

Corporate Overview

The WD-40 Company was established in 1953 as the Rocket Chemical Company in San Diego, California, initially focused on developing rust-preventive solvents and degreasers for the aerospace industry.^[3] In 1969, the company was renamed the WD-40 Company to reflect its flagship product, marking a pivotal shift toward consumer marketing while maintaining its core emphasis on problem-solving formulations.^[2] Headquartered in San Diego, the company employs 714 people worldwide as of August 31, 2025 and operates with a mission to create positive lasting memories by developing and selling products that solve problems in workshops, factories, and homes.^[32]^[33] Under the long-term leadership of Garry Ridge, who served as president and CEO from 1997 until 2022, the company cultivated a distinctive corporate culture centered on innovation, sustainability, and employee engagement.^[34] Current CEO Steve Brass, who became CEO in 2022 after serving as president and COO since 2019, continues to guide the board's priorities, which include advancing sustainable practices and fostering creative product development to address evolving customer needs.^[35]^[36] The company's values emphasize a "tribal" culture of belonging, where "tribal knowledge" sharing through learning and teaching empowers employees to contribute ideas freely, promoting a people-first approach without major acquisitions that have fundamentally altered its identity as a focused marketer of maintenance solutions.^[37]^[38] The WD-40 Company has been publicly traded on the NASDAQ stock exchange since 1973, enabling steady growth while preserving its San Diego roots.^[39] In recognition of its contributions to aerospace innovation—stemming from the product's original development for missile protection—the WD-40 brand was inducted into the San Diego Air & Space Museum's International Air & Space Hall of Fame in 2014.^[5]

Products and Brands

The WD-40 Multi-Use Product serves as the cornerstone of the company's portfolio, originally formulated as a water-displacing spray and now available in various sizes such as 8-ounce aerosol cans, 11-ounce cans with Smart Straw applicators, 14-ounce trigger sprays, and larger formats including 1-gallon bulk containers for industrial use. This versatile product acts as a lubricant, penetrant, rust preventer, and cleaner, distributed globally in both aerosol and non-aerosol pump spray forms to accommodate diverse consumer needs.^[3] In the 2010s, the company expanded its offerings with the WD-40 Specialist line, launched in 2011 to target professional and industrial applications with high-performance formulas. This range includes specialized products such as Rust Release Penetrant Spray for loosening rusted components, Electrical Contact Cleaner for electronics maintenance, Protective White Lithium Grease for high-load lubrication, and Water Resistant Silicone Lubricant for moisture-prone environments, with the lineup growing to over eight items by 2013 and featuring innovations like the no-drip Spray & Stay Gel Lubricant introduced in 2016.^[3]^[40] Beyond the WD-40 brand, the company has diversified through strategic acquisitions, integrating complementary household maintenance products. The 3-IN-ONE brand, acquired in 1995 from Reckitt & Colman, provides everyday lubricants and precision oilers dating back to 1894, emphasizing drip-free application for household tasks. Lava, purchased in 1999 from Block Drug Company, offers heavy-duty bar soaps formulated since 1893 for removing tough grime from hands, while Solvol, acquired in 2000, delivers industrial-strength hand cleaners popular in Australia since 1915. Additional brands include GT85, a UK-based multi-purpose bike maintenance product acquired in 2014, and 1001, a carpet cleaning line bought in 2004.^[3]^[41]^[42] Recent innovations focus on sustainability and targeted efficacy, with biodegradable formulations introduced in the Specialist line during the 2020s, such as the water-based Cleaner & Degreaser featuring a bio-solvent that effectively removes grease while being environmentally friendlier than traditional petroleum distillates. The original WD-40 Multi-Use Product remains non-food-grade due to its petroleum base, though the Specialist range includes compliant options like Food Grade Silicone Lubricant for incidental contact in processing environments. The WD-40 brand enjoys widespread market penetration, with over 80% of U.S. households stocking the product.^[40]^[43]^[44]^[45]

Global Operations and Financial Performance

The WD-40 Company maintains a global presence with its products available in over 176 countries, supported by manufacturing facilities in four key locations and partnerships with more than 20 contract manufacturers across North America, South America, Europe, Asia, and Australia.^[46]^[47]^[11] Key markets include the Americas, which accounted for approximately 47% of net sales at $290.6 million, EIMEA (Europe, India, Middle East, and Africa) at 38% or $236.4 million, and Asia-Pacific at 15% or $93.0 million during fiscal year 2025.^[46] The company's supply chain sources raw materials globally, with a strategic shift toward decentralization initiated in recent years to bring sourcing and manufacturing closer to end markets, thereby mitigating the effects of tariffs and trade disruptions.^[48] This approach has enhanced supply chain resilience, achieving global on-time delivery rates of 96.4% in fiscal 2025 while maintaining inventory levels at 99 days.^[49] Following initiatives launched post-2020, the company has emphasized sustainable sourcing, including third-party assessments of Tier 1 suppliers for greenhouse gas emissions and energy efficiency to reduce its overall carbon footprint.^[50]^[51] In fiscal year 2025, ending August 31, the WD-40 Company reported net sales of $620.0 million, reflecting a 5% year-over-year increase, with net income reaching $91.0 million, up 31% (or 14% excluding a one-time tax benefit).^[46] Operating income grew 8% to $103.8 million, driven primarily by the WD-40 Multi-Use Product, which generated $478.0 million in sales (about 77% of total revenue) with 6% growth, and the Specialist line, which rose 11% to $82.0 million, particularly through expansions in China and other Asia-Pacific markets.^[46] The company faced challenges from inflation affecting raw material costs and potential tariff escalations, prompting further supply chain optimizations and regional expansions, including enhanced distribution in Latin America as part of broader Americas growth strategies.^[46]^[48]^[52] On sustainability, the WD-40 Company has committed to net-zero greenhouse gas emissions by 2050, advancing through a full organizational life cycle assessment covering Scopes 1, 2, and 3 emissions across all products, alongside efforts to implement recyclable packaging and reduce volatile organic compound (VOC) emissions in formulations.^[51]^[53]^[54] Recent product innovations, such as low-VOC maintenance solutions, further support these goals by minimizing environmental impact while adhering to ISO standards for carbon footprint reduction.^[54]

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Oct 27, 2025 · Net Sales: $619.985 million, an increase of $29.4 million or 5% compared to the prior fiscal year, driven by higher sales volume and average ...
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Voluntary Carbon Market Disclosure - WD-40 Company
We are currently in the process of developing goals and metrics regarding our GHG emissions and will report on them as soon as they are established.Missing: initiatives | Show results with:initiatives<|control11|><|separator|>
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WD-40 (WDFC) Q4 2025 Earnings Call Transcript | The Motley Fool
Oct 22, 2025 · Maintenance Product Sales -- $156 million in the fourth quarter and $591 million for fiscal year 2025, each up 6% compared to the prior year and ...