Expanded Perlite Boards
High-Performance Thermal & Cryogenic Insulation | CUI Resistant | Waterproof | Fireproof
Product Overview
Wedge India’s Expanded Perlite Boards are engineered from premium expanded perlite bulk material blended with waterproofing agents and high-strength binders. They offer exceptional thermal insulation performance across a wide temperature range — from cryogenic (-190°C) to high-temperature (+650°C) applications.
Thanks to 99–100% hydrophobicity and an integrated rust inhibitor, our Perlite Boards effectively prevent Corrosion Under Insulation (CUI) and maintain their performance even in harsh industrial environments. These boards are non-combustible, rot-proof, damp-proof, and sound-absorbing, making them an ideal insulation choice for industrial, construction, and fire-protection projects.
 
Key Features & Benefits
Exceptional Thermal Performance – Low thermal conductivity (0.059–0.062 W/m·K at 50°C) ensures minimal heat loss.
Corrosion Protection – Built-in rust inhibitor neutralizes chlorides, eliminating CUI risk.
Wide Temperature Range – Reliable performance from -190°C to +650°C.
Waterproof & Fireproof – 99–100% water-repellent, inorganic, and non-flammable.
Lightweight & Easy to Install – Low bulk density for easy handling and reduced structural load.
Eco-Friendly – Asbestos-free, chemically inert, and safe for the environment.
 
Applications
Cryogenic Insulation – LNG, liquid nitrogen pipelines, cold storage panels.
High-Temperature Insulation – Furnaces, boilers, process pipelines, and foundry equipment.
Fireproofing & Passive Fire Protection – Industrial plants, structural steel, and fire door cores.
Acoustic Insulation – Walls, ceilings, and machinery enclosures.
Waterproofing Projects – Swimming pools, specialized construction, and damp-prone areas.
 
Technical Specifications
Property
W-Pearl220
W-Pearl250
W-Pearl350
Colour
White
White
White
Service Temp.
-190°C to +650°C
-190°C to +650°C
-190°C to +650°C
Bulk Density (kg/m³)
220
250
350
Hydrophobicity (%)
99–100
99–100
99–100
Cold Compressive Strength (MPa)
0.45
0.55
0.55
Flexural Strength (MPa)
0.25
0.3
0.3
Thermal Conductivity (W/m·K @ 50°C)
0.059
0.06
0.062
Sizes (mm)
Length: 600, 1050, 2100Width: 300, 900, 950Thickness: 25–100
 
Why Choose Wedge Expanded Perlite Boards?
Dual Application – Performs in both hot and cold environments.
Long-Lasting – Maintains insulation performance over decades.
Custom Dimensions – Available in multiple lengths, widths, and thicknesses.
Global Expertise – Backed by Wedge Group’s proven insulation technology in over 30 countries.
 
FAQs about Expanded Perlite Boards
Q1: What makes Expanded Perlite Boards better than Rockwool for some projects?
A: Unlike Rockwool, Expanded Perlite Boards offer 99–100% hydrophobicity and are CUI-resistant, making them more durable in moisture-prone and cryogenic applications.
Q2: Can they be used in LNG and cryogenic environments?
A: Yes. Their -190°C rating makes them ideal for LNG pipelines, storage tanks, and cold chain facilities.
Q3: How does the rust inhibitor work?
A: If moisture enters, the rust inhibitor neutralizes chlorides, preventing corrosion on steel surfaces under the insulation.
Q4: Are they suitable for fire door manufacturing?
A: Absolutely. Wedge MgO Perlite boards provide excellent fire resistance, soundproofing, and structural stability for fire door cores.
Q5: Do they require special maintenance?
A: No. Thanks to their waterproof, rot-proof, and chemical-resistant properties, Expanded Perlite Boards require minimal maintenance.