WHITTEMORE TECHNICAL DATA SHEET Vermiculite and .
WHITTEMORE TECHNICAL DATA SHEET Product: Whittemore Perlite Grade: Loose Fill Insulation Composition: Perlite, Amorphous Alumina Silicate Density: 211 lbs per cubic foot (loose) PH Range: Sieve Analysis (% Retained; by weight) Sieve # 4 ( mm)5 % Maximum Plus 4 .