Your trailer axle bearings work hard—hauling loads, enduring heat, and facing water. One of the simplest ways to protect them is using the right grease and compatible hardware.
This guide reviews five essential products, from marine-grade greases to replacement seals and dust caps, so you can keep your bearings rolling smoothly and avoid roadside failures.
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Lucas Oil 10320 Marine Grease – Waterproof
Lucas Oil 10320 Marine Grease is formulated specifically to handle water submersion and washout, making it an ideal choice for boat trailers or any rig that sees frequent rain or launches. Its tacky consistency clings to bearings even in high-speed rotation, reducing dry-out and extending service intervals.
The 14-ounce tube fits standard grease guns for easy application. While it lacks an explicit NLGI rating on the label, its performance in wet conditions is well proven among trailer owners. Use this grease if you need reliable lubrication that resists corrosion and water contamination.
- Superior water resistance
- Excellent rust prevention
- Trusted brand reputation
- 14-ounce size may be small
- Not labeled NLGI 2
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- Lucas Oil 10320 Marine Grease – 14 Ounce
iBroPrat 2-Pack Dust Caps – Heavy Duty
The iBroPrat 2-Pack Trailer Axle Dust Caps are built from heavy-duty carbon steel with a zinc-plated finish that resists rust and corrosion. Each cap has an outer diameter of 1.98 inches, fitting most 2,000 to 3,500 lb Dexter and similar trailer hubs. They work with both EZ-Lube and standard axles.
You also receive two spare rubber plugs, which is handy if a seal gets damaged during installation or maintenance. While the caps are strong, avoid using excessive force when pressing them on. For a quick, affordable dust cap replacement with extra seals, this set is a solid choice.
- Durable carbon steel construction
- Includes extra rubber seals
- Fits common 1.98-inch hubs
- Only zinc plated, not stainless
- Caps may dent if over-tightened
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- 【HEAVY DUTY 】These dust caps are made of high quality carbon steel and rubber, surface zinc plated, strong and durable, not easy to deform, corrode or rust.
- 【WITH EXTRA 2 SEALS】 2 caps meet your daily use and extra 2 seals will be a reserve in case you get into trouble.
- 【DIMENSION】OD: 1.98 inch/ 50.4 mm.Please check the size information and compatibility carefully before placing an order.
- 【FIT】Fit most standard 2000 -3500 lb trailer wheel hub for both types of axles EZ Lube and standard. Fit standard brake & idler trailer axles for most 4 lug & 5 lug axles with 1.98" diameter cap.
- 【SATISFACTION GUARANTEE】For whatever reason, if you are not satisfied, you can request a replacement. Please do not hesitate to contact us if you have any questions. We will show you our sincere attitude and satisfactory solution. Please rest assured purchase.
SUNCARACCL Rubber Plugs 4-Pack – Simple
SUNCARACCL’s 4-Pack Rubber Grease Plugs are designed to fit standard 1.98-inch trailer hubs, providing a simple and effective seal for your wheel bearings. Made from soft, high-quality rubber, they press into the hub dust cap opening and conform to the shape for a tight barrier against water and grime. They work equally well on EZ-Lube and standard axles.
Each plug measures 1.48 inches in diameter, so measure your hub’s cap opening before ordering. The four-pack gives you spares for multiple wheels or future replacements. If you need a no-hassle, low-cost way to protect your grease and bearings, these plugs are a handy solution.
- Soft, flexible rubber material
- Good water and dust seal
- Four plugs included
- Only rubber, no metal cap
- Slightly small for some hubs
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- 【Compatible with】 These bearing buddy rubber caps Fit most standard 2000 -3500 lb trailer wheel hub for both types of axles EZ Lube and standard.
- 【High Quality Material】 These dust caps for trailer are made of high quality rubber,which is soft,good elasticity, high toughness and durable,and can effectively resist water,dust,oil and chemical.
- 【Detailed Size】Our trailer hub dust cover is 1.48" in diameter,please carefully check the size information and compatibility carefully before ordering.
- 【Package Include】The package includes 4 pcs rubber grease plugs,providing a good seal and replacement for Axle grease cap.
- 【Rubber Plugs Features】- Our Rubber Grease Plugs is designed to keep Impurities from entering the trailer cap wheel center and Preserves Grease Life.
Better Boat Marine Grease 2-Pack – All-Weather
Better Boat Marine Grease is a high-performance lithium-based lubricant rated NLGI #2 and certified GC-LB, ensuring it meets the demands of both marine and automotive applications. It resists water washout and maintains its consistency across a wide temperature range, from freezing winter trips to hot summer hauls. The 14-ounce tube comes in a two-pack, giving you ample supply for multiple axles or a spare for the toolbox.
This grease works well on trailers, wheel bearings, hitch balls, and boat machinery. Its blue color makes application easy to see but can stain fabrics if not handled carefully. For a versatile, weather-ready grease that handles high heat and wet conditions, this is an excellent choice.
- All-weather temperature range
- NLGI #2 and GC-LB rated
- Versatile for multiple uses
- Blue color may stain clothes
- Tube can leak if stored sideways
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- UNIVERSAL APPLICATION: Simplify maintenance with a versatile grease tube in both a 14oz or 3oz size that excels in protecting trailers, wheel bearings, hitch ball and marine machinery. The ultimate high temp marine bearing grease cartridge solution
- HIGH PERFORMANCE SUPERIOR QUALITY: Our blue lithium based all purpose grease is NLGI #2 rated GC-LB and meets the ASTM D4950 requirements, ensuring your equipment is shielded by industry-leading standards and robust high temp grease capabilities.
- WEATHER-READY: Trust in a grease designed to perform in a wide high temperature range, offering year-round protection from freezing to extreme heats. Our marine grease tube works on your boat trailer bike atv or other trailers in a 3 oz or 14oz gun.
- UNMATCHED DURABILITY: Enjoy lasting protection in wet conditions with our automotive and marine grade grease tube, thanks to a waterproof formula that prevents washout and corrosion under harsh marine wheel bearing grease and axle bearing conditions
- WHY BETTER BOAT: We are a family owned American business committed to making premium boating accessories. We stand behind your satisfaction and our marine grade boat accessories including our NLGI 2 grease cartridges for grease gun solutions.
TiciKim 4-Pack Grease Seals – Leak-Free
TiciKim’s 4-Pack Trailer Axle Grease Seals are designed to replace Dexter part 010-019-00, Transcom 171255TB, and other common seals for 3,500 lb, five-lug hubs. With an inner diameter of 1.719 inches and outer diameter of 2.565 inches, they fit #84 spindles and EZ-Lube axles. The double-lip construction, made from NBR rubber and spring steel, provides strong sealing performance that resists oil leakage and corrosion.
Each pack also includes four cotter pins of 2.25-inch length, which are often needed during hub reassembly. Before buying, measure your existing seal’s ID and OD to confirm fit. If you’re rebuilding a Dexter or compatible axle, these seals offer a dependable, no-leak solution at a reasonable price.
- Double-lip design prevents leaks
- Includes four cotter pins
- Fits Dexter and EZ-Lube axles
- Limited to 3,500 lb hubs
- Not for all spindle sizes
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- Fits most 3,500 lb. 5 Lug Hubs, EZ-Lube Axles and #84 Spindles.
- Replace for Dexter 010-019-00 (10-19), Transcom 171255TB, National 473336, NOK AD2548EO, GS-2250DL.
- Dimension: Grease Seal (ID 1.719" x OD 2.565"); Cotter Pin (Length 2.25"). Please measure the ID & OD of your old seals before buying.
- No Leakage: High-quality NBR rubber and spring steel construction combined with a double-lip design provides good sealing performance, oil resistance, and corrosion resistance.
- Value Package: TOTAL 8PCS parts including 4PCS grease seals and 4PCS cotter pins. Great value kit for multiple repair needs.
Buyer’s Guide: What to Consider
Choosing the right grease and components keeps your trailer axle bearings safe from wear, heat, and moisture.
- Grease type & rating: Look for NLGI #2 rating and water-resistant additives like lithium complex or marine-grade formula.
- Seal dimensions: Measure old seal IDs and ODs; proper fit prevents leaks and contamination.
- Dust cap size: Dust caps must match your hub's outer diameter; common sizes are 1.98 inches.
- Plug material: Rubber plugs with good elasticity seal better against water and dirt than stiff alternatives.
- EZ-Lube compatibility: For EZ-Lube axles, use compatible seals and caps that allow even grease distribution.
Conclusion
Whether you need a heavy-duty marine grease like Lucas Oil or replacement seals and caps, matching the right product to your axle setup is essential for safe towing.
Start with the lubricant (Lucas Oil 10320), then pair it with high-quality seals and dust caps from iBroPrat or TiciKim for reliable, long-lasting protection.