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AMSOIL · Product code GWR

AMSOIL Synthetic Water-Resistant Grease

Provides exceptional film strength, shear resistance, adhesion properties and mechanical stability. Its water-washout and sprayoff resistance are outstanding for applications frequently exposed to water, mud, snow or ice, including ATVs, UTVs, snowmobiles and boat trailers.

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GWR35-EA
35 lb. Lug
GWR99-EA
120 lb. Keg
GWRCR-CA
14 oz. Cartridges, Case of 10
GWRCR-EA
14 oz. Cartridge
GWRCR-PK
14 oz. Cartridges, Pack of 40

Product highlights

Specially formulated for wet-duty performance
Excellent water-washout resistance to stay in place longer
Exceptional protection from corrosion
Outstanding load-carrying and EP performance for heavy and abusive loads

Provides exceptional film strength, shear resistance, adhesion properties and mechanical stability. Its water-washout and sprayoff resistance are outstanding for applications frequently exposed to water, mud, snow or ice, including ATVs, UTVs, snowmobiles and boat trailers.

See the product data sheet for full details.

MAXIMUM PROTECTION AND PERFORMANCE

  • Holds together when exposed to standing or pressurized water
  • Clings tenaciously to metal surfaces to prevent washout and spray-off
  • Protects components against metal-to-metal contact under heavy loads
  • Fights rust and corrosion to protect metal surfaces and prevent damage

FORMULATED FOR WET-DUTY PERFORMANCE

  • Meets the performance requirements of the NLGI GC-LB and HPM+WR specifications
  • Recommended for applications frequently exposed to water, mud, snow or ice, including ATVs, UTVs, snowmobiles and marine applications

SDS

WARRANTY

Application Recommendation

AMSOIL Synthetic Water-Resistant Grease meets the requirements of the HPM core specification and is enhanced with the WR (Water Resistance) tag set by the National Lubrication Grease Institute (NLGI) for wheel-bearing (GC) and chassis applications (LB). It may be used in automotive wheel bearings, chassis or other applications for which an NLGI #2 GC or LB grease is recommended and exposure to water, humidity or other high-moisture conditions is common.

Superior Lubrication and Protection in Automotive, Powersports and Industrial Applications With Extensive Exposure to Water.

AMSOIL Synthetic Water-Resistant Grease is an extreme-pressure grease formulated specially for wet-duty performance. Composed of premium-quality synthetic base oils and calcium sulfonate complex thickeners, AMSOIL Synthetic Water-Resistant Grease provides exceptional film strength, shear resistance, adhesion properties and mechanical stability. Its water-washout and sprayoff resistance are outstanding for applications frequently exposed to water, mud, snow or ice, including ATVs, UTVs, snowmobiles and marine applications.

Water-Washout and Sprayoff Protection

The superior wet-duty performance of AMSOIL Synthetic Water-Resistant Grease is formulated with extra durable cohesive and adhesive chemistry. It holds together when exposed to water and clings tenaciously to metal surfaces when wet, protecting components during prolonged exposure to standing or pressurized water.

Corrosion Protection

Frequent or prolonged water contact can increase corrosion, resulting in damage to metal surfaces and compromised components. AMSOIL Synthetic Water-Resistant Grease seals metal surfaces and chemically fights corrosion, making it ideal for applications with extensive exposure to water, mud, snow or ice.

Load-Carrying and Extreme-Pressure Performance

AMSOIL Synthetic Water-Resistant Grease protects components from metal-to-metal contact even under heavy loads. Its extreme-pressure additives protect against sustained or sudden extreme loads for dependable protection against wear.

Application Maintenance

Maintaining a clean work environment is important when greasing equipment. Wipe grease fittings clean prior to injecting grease to prevent contaminant ingestion. Maintain bearing housings one-third to one-half full of grease. Do not over-grease, as excessive heat buildup can result. Supplement standard grease maintenance by cleaning and packing housings with fresh grease on an established maintenance schedule.

Product Availability

AMSOIL Synthetic Water-Resistant Grease is available in 14-oz. cartridges, 35-lb. lugs and 120-lb. kegs.

Compatibility

AMSOIL Synthetic Water-Resistant Grease is compatible with many other types of grease; however, it is recommended that, when changing greases, the equipment be cleaned of the old grease when possible or flushed with a liberal amount of AMSOIL Synthetic Water-Resistant Grease while the mechanism is in operation. Closely monitor the system for any inconsistencies. Grease compatibility questions should be referred to your AMSOIL representative or AMSOIL INC.

Technical Properties

PropertyGWR
ThickenerCalcium Sulfonate Complex
NLGI Consistency Grade2
NLGI Performance GradeGC-LB, HPM+WR
Penetration (ASTM D217) (25°C [77°F], 0.1 mm), worked 60 strokes275
Operating Range, °F (°C)-40 to 350 (-40 to 177)
Dropping Point, °F (°C) (ASTM D2265)>600 (>316)
High-Temperature Life, hours (ASTM D3527)120
Water Washout, % (ASTM D1264)0.8
Rust and Corrosion (ASTM D1743)Pass
Oil Separation, % (ASTM D6184)0 (ASTM D6184)
Leakage, g lost (ASTM D4290)2.3
Four-Ball Wear Test, mm scar (ASTM D2266)0.42
Four-Ball EP, kgf (ASTM D2596), Weld Point620
Timken OK Load Test, lbs (ASTM D2509)65
Low-Temperature Torque, N•m (ASTM D4693), -40°C [-40°F]8.7
Base Oil Viscosity @ 40°C, cSt170
ColorBlue
TextureSmooth with Tack

Customer Reviews

4.9 out of 5 from 59 reviews

Good grease wished available in smsll

5.0 / 5

This is an excellent grease. I use it all the time. I have two small grease guns that I used to use it in and it’s no longer available. Use it all the time and then wished it was still available in the small Greece tube. Great for small jobs.

By SHAWN, June 19, 2026 on June 19, 2026 · Verified Buyer · Recommends this product · Helpful: 0

WR grease

5.0 / 5

Great product, used it on my Teryx when I was doing a clutch mod. Great for gaskets

By WAYNE, April 18, 2026 on April 18, 2026 · Verified Buyer · Recommends this product · Helpful: 0

Trailer Grease

5.0 / 5

Works great on my boat trailer.

By KEVIN, Florida on March 24, 2026 · Verified Buyer · Recommends this product · Helpful: 0

Water resistant.

5.0 / 5

Great product for my drive shafts love that its water resistant.

By KOBE, Saskatoon on November 25, 2025 · Verified Buyer · Recommends this product · Helpful: 0

Synthetic Water-Resistant Grease is excellent

5.0 / 5

This is the only grease I will use for my mower. It provides excellent protection from water infiltration in the bearings.

By RON, South Carolina on July 30, 2025 · Verified Buyer · Recommends this product · Helpful: 1

Can't get BETTER

5.0 / 5

Its pretty difficult to find issues with AMSOIL products.

By LEN, July 14, 2025 on July 14, 2025 · Verified Buyer · Recommends this product · Helpful: 0

Best grease around

5.0 / 5

This grease is great for everything! I use it on my outboard motors, wheel hubs/ bearings, and vehicle suspension parts. I live where I take my boat into salt water and since I have used this grease I have seen a difference in how it does not breakdown like other products after heavy temperature swings. I highly recommend it to anyone.

By MATT, Maple Valley WA on July 7, 2025 · Verified Buyer · Recommends this product · Helpful: 1

Product Outstanding Shipping Box Horrible

4.0 / 5

Outstanding product part of a 18 item purchase including (2) gallon jugs. Shipping box used was horrible. Large box split along (2) of the long seams. Amsoil use a heavier than 32 lb crush box next time.

By Mike, South Carolina on July 5, 2025 · Verified Buyer · Recommends this product · Helpful: 0

Use Grease for my forcklift

5.0 / 5

Très bonne graisse et je l’utilise pour faire la maintenance d’une flotte de chariot élévateur à chaque semaine et elle reste longtemps car j’utilise de moin en de graisse et même avec un lavage et la pluie elle reste bien présente Je la recommande

By MARTIN, Gatineau on April 24, 2025 · Verified Buyer · Recommends this product · Helpful: 1

mhmm

5.0 / 5

I use it in my hair it works wonders, wife approves!

By KYLE, March 31, 2025 on March 31, 2025 · Verified Buyer · Recommends this product · Helpful: 4



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