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Product Code: GWR

Synthetic Water Resistant Grease

Superior Lubrication and Protection in Automotive and Industrial Applications Resists water washout and degradation. Unparalleled protection for boat trailer wheel bearings and other components frequently exposed to water.
Stays in place, lubricates and protects against rust.


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, 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.

Water-Washout and Sprayoff Protection
The superior wet-duty performance of AMSOIL Synthetic Water-Resistant Grease can be credited to its outstanding cohesive and adhesive properties. 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. Water-Resistant Grease seals metal surfaces and chemically fights corrosion, making it an ideal solution 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 Recommendation
AMSOIL Synthetic Water-Resistant Grease meets the highest performance standards set by the National Lubrication Grease Institute (NLGI) for wheel bearing applications (GC) and chassis applications (LB). It may be used in automotive wheel bearings, chassis or other applications for which an NLGI No. 2 GC or LB grease is recommended.

AMSOIL Synthetic Water-Resistant Grease is compatible with many other types of greases. 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 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.

Maintaining a clean work environment is important when equipment greasing is performed. 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.

Typical Technical Properties
Synthetic Water Resistant Grease (GWR) GWRNLGI GC/LB Requirements
Thickenercalcium sulfonate complexNR
NLGI consistency grade2NR
NLGI performance gradeGC-LBNR
Penetration (ASTM D217) (25C [77F], 0.1 mm) worked 60 strokes277220-340 min
Dropping point, F (C) (ASTM D2265)>500 (>260)428 (220) min
High temperature life, hours (ASTM D3527)11580 min
Water washout, percent (ASTM D1264)1.2515 max
Rust and corrosion (ASTM D1743)passpass
Oil separation, percent loss (ASTM D1742) (24 hours, 25C [77F])06.0 max
Leakage, g lost (ASTM D4290)4.210 max
Four-ball wear test, mm scar (ASTM D2266)0.420.60 max
Fretting wear, mg (ASTM D4170)2.510 max
Four ball EP, kgf (ASTM D2596)

Weld point

Load wear index



200 min

30 min

Timken OK load test, lbs (ASTM D2509)70NR
Low-temperature torque, Nm (ASTM D4693) (-40C [-40F])6.815.5 max
Oil viscosity, 40C (104F), cSt165NR
Texturesmooth with tack NR

NR: Not required for NLGI GC-LB labeling

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