1.Expanded Perlite 2.Course, Medium, Fine 3.Fine particles 4.Good performance 5.Competitve price Expanded Perlite , Unexpanded Perlite Properties and Application: Perlite is not a trade name but a generic term for naturally occurring siliceous rock. The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it ...