ASTM C744 specifies the following tests for pre-faced glazed concrete masonry units
Cracking and Crazing	A test to ensure that the units are free from cracking and/or crazing.	Complies
Resistance to Staining and Chemicals	Testing of various chemicals, i.e., detergents, solvents, etc., in concentrations set by ASTM standards and ASTM requirements.	Complies
Adhesion	A test to determine the adhesion of the glazed facing to the block substrate.	Complies
Abrasion	A test to measure the abrasion resistance of the glazed facing.	Complies
Color Change	A test by accelerated weathering apparatus to measure color fading or change.	Complies
Soiling and Cleansability	A test to determine how easily the glazed surface can be cleaned.	Complies
Efflorescence	A test to ensure that unsightly soluble salts do not migrate to the surface when moisture is present.	Complies
Dimensional Tolerances	A test to ensure that variations in the sizes of the blocks in all dimensions are less than 1/16".	Complies
Efflorescence	A test to ensure that unsightly soluble salts do not migrate to the surface when moisture is present.	Complies
Dimensional Tolerances	A test to ensure that variations in the sizes of the blocks in all dimensions are less than 1/16".	Complies
Face Variation	A test to ensure that the glazed facing dimensions do not vary more than 1/16".	Complies
Depth Variation	A test by measurements to ensure that the thickness of the prefaced block are within 1/16" of the specified size.	Complies
Distortion of Facing	A test by measurements to ensure that the glazed facing is straight, true and in plane within 1/16".	Complies
Surface	A laboratory inspection for quality of the face (no imperfection).	Complies
Flame Spread Index *	A test to determine how much the glazed facing will allow flame to spread in a fire.	Complies
Smoke Development **	A test to determine the amount of smoke given off by the glazed facing in a fire.	Complies
* The test method specified in ASTM E84 is used to determine surface burning characteristics. ** In this test, red oak is given a value of 100 and asbestos cement board is given a value of 0 to calibrate the test equipment.
ASTM C90 specifies the following test for load-bearing concrete masonry units
Compressive Strength and Moisture Absorbency	A test to ensure that blocks meet strength and moisture requirements and are free of cracks and other defects.	Complies
Canadian Standard CSA-CAN3-A165.3-M85
Aging and Thermal Shock	A test to ensure that no cracking, spalling, crazing or blistering of the glaze occurs when the unit is subject to cycles of thermal shock at 0º and 93º C.	Complies
Other Tests:
Freeze/Thaw	Test A test to ensure that the glazed facing does not crack or craze when exposed repeatedly to freeze thaw cycles.	Complies
Acid Rain Test	A test to ensure that acid rain does not mar the face of Astra-Glaze-SW+ blocks.	Complies
Diesel Fume Exhaust	Test A test to measure the effect of prolonged diesel fume exhaust on the facing of Astra-Glaze-SW+ blocks.	Complies
Waste Water Treatment Plant Test .	A test to ensure that the glazed facing is not affected by chemicals found in waste water treatment plant environments	Complies
ASTRA-GLAZE-SW+ units meet USDA approval
Industry-Specific Testing
Industry-specific certificate of analysis testing has been completed for ASTRA-GLAZE-SW+ glazed masonry units by Froehling and Robertson, Inc. Laboratories. ASTRA-GLAZE-SW+ units successfully pass chemical and medical agents, steam, fuel and detergent testing in: Veterinary Hospitals & Clinics Animal Shelters Power Plants Machine Shops Heating Plants Control Labs Brewing & Distilling Industries Wash Rooms & Showers Laundry Rooms Dairy Industry Jails Meat Packagers Slaughter Houses Seafood Industries Kitchens & Food Preparation Facilities Dish Washing Bars