High temperature industrial E.P. grease


The AF-300 is a superior quality extreme pressure high temperature grease with ANTIFRICTION TREATMENT which outperforms lithium, aluminum and polyurea base standard greases of the same of viscosity.

Characteristics and Benefits

The AF-300 unique formulation includes such elements as:
- Overbased calcium sulfonate complex;
- Superior quality mineral base oil;
Its exclusive PROLAB formula brings the AF-300 extreme pressure high temperature grease to an exceptional level of performance: it is super adherent and reduces friction, protects against rust, corrosion and oxidation, provides exceptional load resistance as well an excellent mechanical stability and moisture, vapour and washout resistance.
The exceptional properties of the AF-300 extreme pressure high temperature grease bring notable benefits from regular use including less frequent lubricating jobs and substantial savings on maintenance costs.
Available in NLGI grade 2, Prolab's AF-300 extreme pressure high temperature grease is safe to use as it contains no contaminants harmful to the environment.

Types of Application

The AF-300 is a must for every type of business, no matter what the size or the nature of the operations. It performs best in the lubrication of joints and pins as well as in difficult conditions such as heavy loads, slow rotational speeds (less than 1000 rpm) and very high temperatures, up to 260°C, (for example, cubage, excavation, steelworks, etc.)

Directions for Use

Always use AF-300 extreme pressure high temperature grease in reference to the equipment manufacturer's manual.


Whenever performing a grease change, make sure to validate the compatibility of the various greases used (refer to PROLAB's grease compatibility chart).

Available Sizes

435gr, 17 kg, 55 kg, 180 kg

Product Code

# 281



Characteristics astm test typical values
Appearance   Dark brown
N.L.G.I. grade   2
Viscosity at 40oC D445 750 cSt
Viscosity at 100oC D445 35,2 cSt
Viscosity index D2270 107
Dropping point D2265 300oC
Oil separation at 25oC D1742 0,2%
Consistency 60 X D217 280 (1/10mm)
Shear stability 100,000 X D217 2,3%
Shear stability 10,000 X (50/50 with water) D217 4%
Roll stability D1831 3,7%
Bearing leak tendency D4290 4 SI
Oxydation resistance 1000h D942 9 psi
Bearing life D3527 100 hrs
4-ball wear (75oC, 40 kg, 1200 t/m, 1h) D2266 0,38 mm
Load wear index D2596 62
Weld load D2596 500 kg
Timken OK load D2509 27 kg
Rust preventative D1743 Pass
Water spray resistance at 79oC D1264 2,0%
Corrosion - copper strip D130 1b
Salt fog corrosion (1 mil d.f.t.) B117 >300 hrs.
Oil separation (100oC, 30 hrs.) D6184 n.d.


23oC (73oF)

-18oC (0oF)

-23oC (-10oF)

-29oC (-20oF)

-34oC (-30oF)



234 g/min

1 gr/min

0 gr/min

0 gr/min

0 gr/min