WD?40’s Multi?Use Formula Is Quietly Getting Smarter — Here’s How

WD?40’s classic blue-and-yellow can just got a smarter twist for US DIYers and homeowners. The formula is familiar, but the way you spray, store, and actually use it is changing. Here’s what most buyers completely miss.

Bottom line up front: If you still think WD?40 is just “that squeaky hinge spray,” you’re leaving a lot of performance on the table. The latest multi-use cans in the US — especially the Smart Straw and EZ?Reach formats — turn the classic WD?40 Multifunktionsprodukt into a precise, problem-solving tool for cars, bikes, tools, and even stuck home hardware.

You get the same multi-purpose formula people in Europe call the WD?40 "Multifunktionsprodukt" (multi-function product), but packaged for US garages and gear bags with better control, less mess, and more reach. If you work on anything mechanical — from an old truck to a kid’s scooter — this is one of those products you actually end up using every week.

What users need to know now…

In the US, WD?40 Company doesn’t always use the German name "Multifunktionsprodukt" on the can, but it’s the same core multi-use spray that loosens rusted parts, displaces moisture, stops squeaks, and protects metal. Recent coverage from DIY channels, automotive blogs, and tool reviewers has zeroed in on how the delivery systems — not the formula — have become the real upgrade.

Analysis: What's behind the hype

WD?40’s core multi-use formula has been around for decades, but in the US it has quietly evolved into an entire system of cans and applicators built around the same chemistry. When German or EU packaging calls it "WD?40 Multifunktionsprodukt," US buyers will see "WD?40 Multi-Use Product" in formats like Smart Straw and EZ?Reach.

Recent hands-on coverage from US-focused outlets like Popular Mechanics and major tool YouTubers highlights three things:

• Smart Straw stays attached, so you don’t lose the red straw and you can switch from wide spray to precision stream instantly.
• EZ?Reach adds a flexible metal tube that snakes into tight spots — engine bays, hinges behind body panels, concealed pulleys.
• The formula itself is unchanged in purpose: it penetrates, lubricates lightly, displaces water, and protects metal from corrosion.

Here’s a high-level look at how the multi-use product — the same concept as the "Multifunktionsprodukt" — is sold and used in the US market:

Variant (US)	Core Purpose	Key Delivery Feature	Typical US Street Price (USD)*	Best For
WD?40 Multi-Use Product, 8 oz can	General-purpose lubrication & moisture displacement	Standard spray nozzle	? $6–$8	Basic home use, quick fixes
WD?40 Multi-Use Product with Smart Straw, 11 oz	Same formula, more precise control	Flip-up fixed straw (wide spray or precision)	? $7–$10	DIYers, bike maintenance, hinges, locks
WD?40 Multi-Use Product EZ?Reach, 14.4 oz	Same formula, hard-to-reach areas	8-inch flexible metal hose	? $10–$15	Automotive, machinery, tight engine bays
WD?40 Multi-Use Gallon/Jug formats	Bulk use, refilling, dipping & soaking parts	No spray; pour or use with separate sprayer	Varies, often $25+ per gallon	Shops, small businesses, serious tinkerers

*Approximate US online and big-box pricing at time of writing. Always check current prices from retailers.

So what’s actually new for US buyers?

The formula itself is mature — WD?40 is not marketing this as a brand-new chemical breakthrough. Instead, the current "hype" in the US centers on usability and task-specific formats. Over the last few years, WD?40 has doubled down on making the multi-use product:

• Harder to misuse: You can switch between a focused stream and a fan spray without changing parts.
• Easier to keep on hand: Slimmer cans that fit in toolboxes, glove compartments, and bike bags.
• More efficient: Better aim means less overspray, less cleanup, and less wasted product.

For US readers, the key connection to the "WD?40 Multifunktionsprodukt" branding used abroad is this: if you see European content talking about the product’s ability to loosen, lubricate, protect, and clean, those same use cases are exactly what the US-labeled multi-use cans are meant for.

Real-world US use cases

Looking at recent Reddit threads in subreddits like r/DIY, r/MechanicAdvice, and r/Tools, US users repeatedly bring up the same handful of scenarios where the multi-use spray still earns its space on a crowded shelf:

• Stuck fasteners: Loosening rusty bolts on old pickups, lawnmowers, and snow blowers.
• Moisture displacement: Spraying down wet ignition components or damp tools after unexpected rain.
• Noise control: Stopping squeaks in door hinges, garage door rollers, and office chair wheels.
• Light corrosion protection: Coating garden tools, bike chains (short term), and outdoor padlocks.
• Gunk removal: Helping remove sticker residue, road tar, or greasy grime before final cleaning.

Experts do highlight a crucial nuance: WD?40 multi-use is a multi-function maintenance spray, not a heavy-duty long-term lubricant. For high-load parts like chains, bearings, or firearms, specialist lubricants or greases are still recommended after WD?40 helps clean and free the mechanism.

Availability and relevance for US buyers

In the United States, WD?40’s multi-use lineup is widely available at:

• Big-box retailers such as Home Depot, Lowe’s, Walmart, and Target.
• Auto parts stores like AutoZone, O’Reilly, Advance Auto Parts, and NAPA.
• Online marketplaces like Amazon, where multi-packs often drop the per-can price.

US pricing tends to hover between $6 and $15 per can depending on size and format. Bulk formats can be significantly more cost-effective for garages and small businesses, especially when paired with refillable sprayers.

For US homeowners, the Smart Straw 11 oz can is often the sweet spot: it’s compact enough to live in a utility drawer, accurate enough for door locks and electrical connectors, and cheap enough that buying a second can for the car or truck doesn’t sting.

How it compares to alternatives

Independent reviewers and US-based mechanics often compare WD?40’s multi-use formula to:

• Dedicated penetrants (e.g., more aggressive rust-busters) that can sometimes outperform WD?40 on severely seized fasteners.
• Silicone or PTFE sprays that provide longer-lasting, low-friction lubrication on sliding doors, windows, and drawer slides.
• Heavy greases and oils for high-load applications like wheel bearings or industrial machinery.

The consensus from both pro mechanics and serious hobbyists is that WD?40 remains a first-line, generalist tool. It’s the "reach for this first" can: clean, free, displace moisture — then, if the job demands it, follow up with a specialist product.

What the experts say (Verdict)

Across US-focused reviews and forum threads, the verdict on WD?40’s multi-use product — the functional twin of the "WD?40 Multifunktionsprodukt" branding — is remarkably consistent.

Pros highlighted by experts and power users:

• Reliability and familiarity: The formula does what it claims — frees, protects, and displaces moisture — and has decades of real-world proof behind it.
• Smart delivery systems: Smart Straw and EZ?Reach formats solve the long-standing annoyance of lost straws and hard-to-reach hardware.
• Versatility: Suitable for everything from squeaky hinges and sticky zippers to corroded battery terminals and garden tools.
• Value in the US market: Widely available, competitively priced, and often discounted in multi-packs.
• Safe on many materials: When used correctly, it’s generally safe on metal and many plastics (though spot-testing is still advised).

Cons and caveats you should know:

• Not a heavy-duty lubricant: It’s a light-duty, multi-function product. For chains, bearings, and long-term lubrication, you’ll want a dedicated lube after cleaning with WD?40.
• Overspray risk: On painted or delicate surfaces, careless spraying can create clean “spots” or attract dust if you don’t wipe down properly.
• Flammability: As with most aerosol maintenance sprays, you need ventilation and distance from open flames and hot surfaces.

US reviewers at major publications and on large YouTube channels tend to describe WD?40’s multi-use spray as a baseline tool rather than a silver bullet. It’s the can that lives between your hammer and your socket set — something you reach for whenever a part doesn’t move the way it should, or metal meets moisture.

Bottom line for US readers: If you’re seeing European coverage of "WD?40 Multifunktionsprodukt" and wondering what to actually buy at Home Depot or Amazon in the US, you’re looking for the WD?40 Multi-Use Product can — ideally with Smart Straw or EZ?Reach. The chemistry is mature, but the user experience has finally caught up with how you actually work on cars, bikes, and everything else that squeaks, sticks, or rusts.