METALGUARD A81
Heavy-Duty Precharged High-Nitrite Antifreeze Additive Package for use with Virgin or Non-Virgin Glycol (ethylene or propylene)

Product Description and Applications
METALGUARD A81 is a heavy-duty, fully-formulated and precharged additive package that allows antifreeze producers to make a finished product that meets the most demanding industry specifications, including ASTM D6210/6211 and RP 329/330 of the Technology and Maintenance Council of the American Trucking Association. As a precharged additive package, METALGUARD A81 contains the initial charge of supplemental coolant additive, meeting the requirements in the cited specifications. In other words it is available with either a minimum of 2400 ppm nitrite or optionally a nitrite/molybdate formulation with aminimum of 1560 ppm nitrite plus molybdate (with both at or above 600 ppm) in antifreeze concentrate. The cost of the nitrite/molybdate formulation varies widely with the cost of molybdenum metal and its derivative sodium molybdate (METALGUARD A81M)

METALGUARD A81 is a sophisticated, multi component additive system which employs synergistic combinations of inhibitors to provide you with the best corrosion protection available for heavy-duty engine cooling systems, whether in vehicles or stationary engines. A proprietary combination of substituted tolytriazoles and phosphonocarboxylates controls corrosion of steel, cast iron and aluminum . The soft or yellow metals (copper, brass and solder) are protected by a mercaptobenzothiazole/tolytriazole system. METALGUARD A81 also contains antiscalants and dispersants to prevent inorganic salt scaling on heat exchange surfaces and organic fouling due to minor oil leakage into the cooling system.

Compliance with the many dissimilar antifreeze specifications in today’s market also make it important to know what your additive package does not contain. Many European automobile warranties require that non-phosphate antifreezes be used; for many Japanese vehicle warranties, silicate-containing antifreezes are not allowed. Many U.S. vehicle and engine producers do not allow amine-containing antifreezes to be used in their cooling systems. METALGUARD A81 was designed with all of these considerations in mind; it contains no silicates, phosphates, amines or nitrates.

METALGUARD A81 can be used effectively with either ethylene or propylene glycol. This universal additive system can also be used with either virgin or high-quality reclaimed glycol from distillation units, reverse osmosis membranes, and most flocculation/filtration systems. WEBA Corp recommends that you send in sample of any non-virgin glycols that you are considering for use with any of WEBA Corp's additive packages to a laboratory for testing, and send us the results. We will help you determine if any pretreatment will be necessary prior to blending antifreeze to ensure compliance with all required specifications.

Product Specifications

As concentrated additive package:
Visual	Cloudy, pale yellow liquid (or choice of dye)
Specific Gravity	1.180-1.200
pH	12.5-13.5
As concentrated Antifreeze (made with METALGUARD A81):
Specific Gravity	1.110-1.125
pH	10.0-11.0 (ASTM 7.0-11.0)
Reserve Alkalinity	10 ml min.
Freeze Point	-34°F max
Nitrite	2400 ppm min.

METALGUARD A81 is formulated to meet these Industry standards:

• ASTM D 3306
• ASTM D 4985
• ASTM D 6210/11
• TMC of ATA RP329/338
• TMC of ATA RP302A

Nearly all of OEM automotive light-duty ad heavy-duty specifications are patterned after or identical to the ASTM standard specifications given above. For individual OEM specification compliance contact your sales representative. Note that the ASTM specifications listed include the key performance tests (ASTM D1384, D4340, D1881, D2570, D2809).

Blending and Storage Instructions
Always store METALGUARD A81 at a temperature of 60ºF or higher. METALGUARD A81 should be blended with glycol at a treat rate that is 2.2% of the volume of glycol being additized. 5,000 gallons of glycol plus two 55-gallon drums of METALGUARD A81 will produce 5,110 gallons of finished antifreeze concentrate. The glycol should first be charged to the blending vessel at a temperature of 50ºF or higher, and at a pH of 7.0-10.0. Since METALGUARD A81 blends readily with either ethylene or propylene glycol in this temperature and pH range, mixing may be provided by agitation, pump recirculation or air sparging. Add sufficient METALGUARD A81 to equal 2.2% of the volume of glycol being treated; continue mixing for at least 30 minutes after all of the additive package has been transferred into the blending vessel.

Water Quality And Dilution: When antifreeze concentrate is diluted to 50% by volume with water, the water of dilution must be of acceptable quality. Deionized water is the best to use, but other sources of water are acceptable as long as they contain no more than 350 ppm total hardness measured as calcium and magnesium compounds. Higher hardness levels may cause excessive inhibitor consumption, scale deposits and metal pitting.

Making Claims for Antifreeze/Coolant Blended with WEBA Corp's Additive Packages
The specifications listed in this bulletin are based on antifreeze produced with WEBA Corp's additive packages, virgin glycol and deionized water. Antifreeze blenders must demonstrate compliance with ASTM or other specifications with their antifreeze/coolant, because the quality of the glycol and water used is as important as the additive package. Note that OEM's have placed limits on the percentage of recycled glycol that can be used in factory fills as have other purchasers of antifreeze. Glycol quality specifications have also been established. Obtain copies of the specifications that you wish to meet, thoroughly read them and conduct any required tests, prior to stating that the antifreeze produced meets the specifications. WEBA Corp can provide assistance locating the necessary specifications/standards. To confirm that your finished products meet the required industry specifications, WEBA Corp recommends that you test your glycol and finished products at an accredited laboratory. Glycol should be tested for conformance with ASTM E1177 and finished products should be tested for the ASTM performance tests listed on this product bulletin. WEBA Corp can assist your company in preparing your samples for testing with pre-tests performed at the accredited laboratory. WEBA Corp will warrant our additive packages only if the recommended blending procedures are properly followed. In addition, the glycol or other base fluid used with our additive systems must meet industry or ASTM standards unless specifically exempted in our literature.

Ordering Information:

Product Code:	METALGUARD A81
Quantity options (US)	55 gal. Drum, 275 gal. Tote, Bulk
Quantity options (outside US)	205 L Drum, 1000 L Tote, Bulk
Dye	Yes
Dye Options (Color)	Green or custom dye (see chart)

Quality Control
WEBA Corp additive packages are tested for conformance with product specifications and industry standards. A laboratory analysis is conducted for all production lots and shipments and a certificate of analysis is available to customers who require them.

Technical Support
WEBA Corp can answer questions about ASTM standards and industry specifications as well as help with many other questions relating to antifreeze and glycols. To confirm that your finished products meet the required industry specifications, WEBA Corp's laboratory will help you with problem solving and testing associated with any products containing our inhibitor package.