Can you use wd40 on a compound bow
Quick Answer
No β you should not use WD-40 on a compound bow. WD-40 is a water-displacing solvent, not a lubricant. It evaporates within hours, leaves a residue that attracts grit, and contains petroleum distillates that degrade the composite cam bodies, rubber components, and polymer parts found in modern compound bows. The correct alternative is silicone oil β chemically inert, material-safe, and long-lasting.
WD-40 is one of the most recognizable products in any toolbox. It loosens rusted bolts, displaces moisture, and has a hundred household uses. It is also one of the most common mistakes archers make when maintaining a compound bow β and one of the most damaging.
The confusion is understandable. WD-40 claims to lubricate, and it does β briefly. But compound bows are not the application it was designed for, and the materials inside a modern compound bow react badly to what WD-40 leaves behind after the solvent evaporates.
This article explains exactly what WD-40 does to a compound bow, why manufacturers advise against it, and what product to use instead.
Contents
What WD-40 Actually Is
Definition:
WD-40 stands for Water Displacement, 40th formula. It is a petroleum-based penetrating solvent and moisture displacer β not a lubricant. Its primary function is to displace water from metal surfaces and loosen corroded fasteners. The petroleum distillates in its formula evaporate within hours of application, leaving behind a thin oily residue that provides minimal and very short-term friction reduction.
WD-40 was developed in 1953 by the Rocket Chemical Company for the aerospace industry β specifically to protect Atlas missile components from rust and corrosion. The formula that worked is the 40th attempt, hence the name. It was never designed as a long-term lubricant for precision mechanical systems.
WD-40 itself acknowledges this distinction on their own website β they market dedicated lubricant products separately from the original formula precisely because the original WD-40 is not designed for sustained lubrication.
"The most persistent myth in bow maintenance is that WD-40 is a lubricant. It is not. It is a solvent with a short-term oily residue. On a compound bow it does nothing useful and several things harmful."
β Igor G., GNP Defend Product Specialist
What WD-40 Does to a Compound Bow
Understanding the specific damage WD-40 causes requires understanding what a modern compound bow is made from. This is not a steel-on-steel mechanical system. A compound bow contains:
- Composite cam bodies β carbon and resin composite materials
- Polymer cable slides β plastic and polymer components
- Rubber components β limb dampers, string silencers, O-rings in some systems
- Synthetic bowstring fibers β Dyneema and similar high-performance materials
- Anodized aluminum β the riser and many hardware components
Here is what WD-40 does to each of these:
Composite cam bodies β material degradation
The petroleum distillates in WD-40 can attack the resin systems used in composite cam bodies over repeated application. The degradation is slow and cumulative β you won't see it after one use, but consistent use introduces solvent contact that the manufacturer never intended and that the composite was not designed to tolerate.
Rubber components β swelling and cracking
Petroleum-based solvents are well documented to swell, soften, and eventually crack rubber. Limb dampers, string silencers, and any rubber O-rings in the bow's assembly are vulnerable. Once rubber components swell, they lose their dimensional accuracy and their function β dampers no longer dampen correctly, silencers no longer fit properly.
Polymer cable slides β surface degradation
The cable slide is a polymer component that moves under cable pressure every draw cycle. Petroleum solvents can soften and degrade certain polymers, affecting the slide's surface finish and increasing friction rather than reducing it over time.
The grit-trap problem β the most immediate damage
Within hours of application, the solvent component of WD-40 evaporates. What remains is a thin, sticky petroleum residue that acts as a grit magnet. Dust, dirt, and debris adhere to this residue at cam axle contact points β the exact surfaces you were trying to protect. The result is a gritty paste at the axle that functions as an abrasive rather than a lubricant, accelerating wear rather than preventing it.
Bowstring damage β potentially the most serious
If WD-40 migrates onto the bowstring β which it will when applied near axle points β the petroleum solvents break down the fiber structure of modern synthetic string materials. Serving can loosen. Fibers weaken. String life is dramatically shortened. A compromised bowstring on a compound bow under full draw tension is a safety risk.
Warning: Never apply WD-40 near bowstrings or cables. If WD-40 has contacted a bowstring, wipe it off immediately with a clean dry cloth and inspect the string carefully. If there is any sign of serving separation or fiber damage, have the string inspected by a professional before shooting the bow again.
What Bow Manufacturers Say
This is not a position unique to GNP Defend. Major bow manufacturers explicitly advise against WD-40 and similar penetrating oils in their official documentation.
Hoyt Archery, one of the world's leading compound bow manufacturers, states in their FAQ that penetrating oils such as WD-40 are not recommended for compound bow axle lubrication. They recommend silicone or Teflon-based lubrication instead β applied at a specific interval of every 1,500β2,000 shots under normal conditions.
The consensus across manufacturers is consistent: silicone-based or PTFE-based (Teflon) products are appropriate for compound bow lubrication. Petroleum-based solvents and penetrating oils are not.
π‘ Key fact: Hoyt, Mathews, Bowtech, and PSE all specify silicone or PTFE-based lubrication for axle points in their owner's manuals. None recommend WD-40 or petroleum-based penetrating oils. If you cannot find your bow's owner manual, contact the manufacturer directly or check their website before applying any lubricant.
What to Use Instead of WD-40
The correct lubricant for compound bow axles and cable slide rails is silicone oil. Here is why silicone oil is the right choice:
| Property | WD-40 | Silicone Oil |
|---|---|---|
| Type | Petroleum solvent | Chemically inert lubricant |
| Lasting protection | Hours β evaporates quickly | Weeks to months |
| Safe for composites | No β degrades over time | Yes β chemically inert |
| Safe for rubber | No β causes swelling | Yes β preserves elasticity |
| Grit attraction | High β sticky residue | Low β clean film |
| Corrosion protection | Short-term only | Long-term moisture barrier |
| Manufacturer recommended | No | Yes |
| Temperature range | Limited | -58Β°F to +392Β°F |
GNP Defend Silicone Oil β The WD-40 Alternative for Compound Bows
Chemically inert silicone lubricant formulated for compound bow cam axles, cable slide rails, and limb bolt threads. Safe for all bow materials β composite cams, polymer slides, rubber components, and metal surfaces. Stable from -58Β°F to +392Β°F.
- Does not degrade composites, rubber, or polymer bow components
- Stable lubricating film β doesn't evaporate within hours like WD-40
- No sticky residue to trap grit at contact points
- Long-lasting moisture and corrosion protection
- Available in 200ml ($20.95) and 400ml ($26.95) aerosol
Where to apply silicone oil on a compound bow
- Cam axles β open bushing systems only, every 1,500β2,000 shots
- Cable slide rail β light coat along the full length, every 1,500β2,000 shots
- Limb bolt threads β when adjusting or if bolts feel stiff
- Limb pocket contact surfaces β light application to prevent squeaking
For the complete step-by-step guide including diagrams, read: The Complete Guide to Compound Bow Lubrication.
What to Do If You've Already Used WD-40 on Your Bow
If you have already applied WD-40 to your compound bow, the damage depends on where it was applied and how many times.
Step 1 β Inspect the string immediately
Check the full length of the bowstring and cables for any sign of WD-40 contact β the string may feel slicker than normal or show signs of serving loosening. Wipe off any residue immediately with a clean dry cloth. If you see serving separation or fiber damage, take the bow to a pro shop before shooting again.
Step 2 β Clean the axle and slide areas
Wipe down all areas where WD-40 was applied with a clean lint-free cloth. The sticky petroleum residue it leaves behind needs to be removed before you apply fresh silicone oil β lubricating over the residue suspends it in the new oil film and continues to cause problems.
Step 3 β Apply silicone oil
Once the surfaces are clean, apply a small amount of GNP Defend Silicone Oil to the axle points and cable slide rail. Cycle the bow by hand to distribute the lubrication.
Step 4 β Inspect rubber components
Check limb dampers, string silencers, and any rubber components for signs of swelling or cracking. If WD-40 was applied near these components repeatedly, they may need replacement.
If WD-40 was used only once and immediately wiped off, the risk of lasting damage is low. If it has been applied multiple times over an extended period, a professional inspection is worth considering β particularly of the string, cables, and any rubber components.
Frequently Asked Questions
Can you use WD-40 on a compound bow?
No. WD-40 is a petroleum-based penetrating solvent, not a lubricant. It evaporates quickly, leaves a grit-attracting residue, and degrades the composite, rubber, and polymer materials in modern compound bows. Major manufacturers including Hoyt explicitly advise against it. Use silicone oil instead.
What does WD-40 do to a compound bow?
WD-40 evaporates within hours and leaves a sticky petroleum residue that attracts grit at axle contact points. Its solvents degrade rubber components and composite materials over repeated use. If it reaches the bowstring, it breaks down synthetic fiber structure and dramatically shortens string life.
What should I use to lubricate my compound bow instead of WD-40?
Silicone oil is the correct choice for compound bow lubrication. It is chemically inert, safe for all bow materials, provides lasting friction protection, and repels moisture. Apply to cam axles (open bushing systems only) and cable slide rails every 1,500β2,000 shots.
Is WD-40 safe on any part of a compound bow?
No part of a compound bow benefits from WD-40 in the way a proper lubricant would. There is no application on a compound bow β or any bow β for which WD-40 is the recommended product. Silicone oil handles every lubrication need a compound bow has, without the material compatibility risks WD-40 introduces.
I used WD-40 on my bow once β is it ruined?
A single application is unlikely to cause permanent damage if wiped off promptly. Inspect the string and cables carefully for any contact, wipe all surfaces clean with a dry cloth, then apply silicone oil to the affected areas. Repeated use over time is where the damage accumulates.
Does WD-40 remove rust from compound bow parts?
WD-40 can help loosen surface rust on metal parts but it is not appropriate for use on compound bow components. If you have rust on bow hardware, consult a professional archery technician. Using WD-40 to treat rust on a bow risks the material damage described in this article. Preventing rust through regular silicone oil application is more effective than treating it afterward.
Can I use WD-40 on my recurve bow?
No. The same material compatibility concerns apply β rubber components, composite limb materials, and synthetic strings on recurve bows are all vulnerable to petroleum-based solvents. WD-40 is also damaging to wood risers on traditional recurves. Use silicone oil for metal hardware and bowstring wax for strings regardless of bow type.
The Bottom Line
WD-40 is a useful product for many applications. Lubricating a compound bow is not one of them. It is a solvent that evaporates, leaves grit-attracting residue, degrades rubber and composite bow materials, and provides no lasting protection. Every major bow manufacturer recommends against it.
Silicone oil is the correct product for every compound bow lubrication point β cam axles, cable slide rails, and limb bolt threads. It is chemically inert, material-safe, long-lasting, and exactly what your bow was designed to work with.
View GNP Defend Silicone Oil β Β Β Lubrication Guide β Β Β Complete Bow Care Guide β Β Β Best Archery Oil Guide β
About the Author
Igor G. Β· GNP Defend Product Specialist Β· 10+ years in protective lubricant formulation. Igor works directly on the development of GNP Defend's silicone-based product line and writes about practical maintenance for shooters, hunters, and archers.
Published May 11, 2026 Β· Last updated May 11, 2026