Hydrophobic expanded perlite is a naturally occurring siliceous volcanic rock that is moulded into pipe and block forms. Perlite 650 is a high temperature insulation which displays exceptional corrosion inhibiting properties. A negative charge is present within the sodium silicate binder which draws the positive charge from the pipe. This acts as a protection barrier against moisture, oxygen, chlorides and other corrosive elements.
Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. Perlite 650 benefits from meeting or exceeding the minimum physical property requirements of ASTM C 610. Perlite 650 is asbestos-free and benefits from low thermal conductivity with a high compressive strength whilst acting as a strong rigid insulation. Also meets the requirements of ASTM C795 for Stress cracking on Stainless Steel.
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Product Benefits
Please feel free to download our data sheets;
Perlite 650 - Data Sheet & MSDS