Does johns-manville spintex blown insulation contain asbestos?

Johns Manville Spintex blown-in insulation does not contain asbestos. The primary component of Johns Manville Spintex insulation is glass fiber, which is a synthetic material made from molten glass. Asbestos is a naturally occurring mineral that was commonly used in building materials prior to the 1980s, but its use has since been largely discontinued due to its known health risks.