Insulation and Topcoat

Niles Steel Tanks sprayed-on rigid insulation with acrylic topcoat exceeds ASHRAE 90.1b requirements with 2.5” of high density polyurethane foam with an R value of R-16. The 100% acrylic topcoat is formulated for outdoor applications and is designed to withstand a full range of environmental conditions. The 2 component polyurethane foam is applied at directly to the vessel and rises to the desired thickness. The acrylic topcoat protects the spray-on foam from deterioration from the sun.

Spray Polyurethan Foam
  • Specific Gravity: 1.22
  • Density: 2.5
  • Closed Cell Content: >90%
  • K-Factor, initial: 0.152 2″ SPF
  • Permeance: .55
  • Dimensional Stability: +1% – Dry Age 28 days (158°F, Dry)
  • Flame Spread: 25 – ASTM E-84
  • Smoke Development: 450
  • R Value: 6.6 inch
  • Max. Thickness: 4″
Acrylic Coating
Spray Polyurethan Foam
Specific Gravity 1.22
Density 2.5
Closed Cell Content >90%
K-Factor, initial 0.152 2’ SPF
Permeance .55
Dimensional Stability +1% Dry Age 28 days (158ºF, Dry)
Flame Spread 25 – ASTM E-84
Smoke Development 450
R Value 6.6 inch
Acrylic Coating
Topcoat White, 25 mils
Texture Smooth
Grade Spray or Roll
Base 100% Acrylic