Perlite for Construction

The versatile mineral

Perlite plays an important role in a wide variety of construction-related uses including: as an aggregate in lightweight insulating concrete and plaster; as a loose fill insulation material for concrete masonry blocks, cavity walls, in residential homes; and in a variety of specialty applications including fireproofing sprays, chimney fills, interstitial floors, acoustical sprays, etc.

Construction Uses for Perlite
  • Lightweight concrete & plaster
  • Loose fill & slab insulation
  • Fireproofing sprays
  • Chimney fill
  • Interstitial floors
  • Acoustical sprays & ceiling tiles
  • Texturizing agent
  • Fire-rated door cores
  • Blast panels
  • Tile, mortar and grout

Product Specifications

Our construction grade expanded perlite is furnaced to 8.0 lb/ft3 loose weight density. See Tech Info for a Typical Elemental Analysis. Product specifications and availability are subject to change without notice. Contact us for current sizes or to inquire about specialty grades.

See Describing Perlite Particle Size for an explanation of the data shown below.

Construction Grade Perlite

An all purpose grade designed for use as loose fill insulation or to withstand crushing forces inside a transit mixer when mixing with concrete and other aggregates.

US Mesh Inches Microns % Passing by Weight.
4 3/16" 4750 100
8 3/32" 2380 85-100
16 3/64" 1190 40-85
30 600 20-60
50 300 5-25
100 150 0-10
Ratings and Specifications
  • Loose weight density: 8.0 lbs/ft3
  • Fire rated (UL Design U 905)
  • Reduces sound transmission (STC Rating of 51)
  • ASTM C549: Perlite Loose Fill Insulation
  • ASTM C332: Lightweight Aggregates for Insulating Concrete
  • Thermal Resistivity (R-value): approx 3.0 per inch of thickness

Perlite Institute Member

Since 1954