VITROBOND® SULFUR COMBOUNDS
The jointing compound must contain at least 55% sulfur completely soluble in carbon disulfide. It must contain not more than 43% of a properly selected aggregate. The aggregate must be at least 90% silica and have a particle size so distributed as to give optimum physical properties. No clay, shale, brick dust or similar fillers shall be used. The product shall contain polysulfide rubber plasticizer.
This cement must meet ASTM C287 for chemical resistant mortars and must show weight change of less than 1% when 1" cylinders are exposed to the following corrosive materials for 30 days at 150ºF (66ºC):
10% Chromic Acid
60% Acetic Acid
25% Sulfuric Acid
25% Hydrochloric Acid
10% Nitric Acid
The compound must act as an electrical insulator and show no passage of current when electrodes are placed apart a distance of 1/2" on the surface under a potential of 45 volts.