Phenolic Boards

Unparalleled Phenolic Insulation for Superior Thermal Performance

As a leading professional manufacturer of composite materials, WT is proud to present our exceptional phenolic boards collection. 

Our phenolic boards are designed to provide unparalleled thermal insulation, making them the ideal choice for a wide range of applications, including interior and exterior wall insulation, vapor barriers, and more.

The WT ductwork System is an advanced and premium performance pre–insulated HVAC ductwork system which offers benefits such as reduced installation time, low weight, space savings through flush–to–ceiling installation, increased performance and energy efficiency. The system comprises premium performance WTphenolic panels, fabrication methods, coupling systems and a complete line of accessories to produce pre–insulated rectangular ductwork in long sections.

Choose WT for Your Phenolic Board Needs

Phenolic Board

Partner with WT to experience the unparalleled quality and performance of our phenolic board collection. Stand out from the competition by selecting a product that combines innovation, durability, and professional craftsmanship. Trust our expertise as a leading manufacturer to provide you with the best phenolic boards available in the market.

Upgrade your thermal insulation with our phenolic boards today. Experience the difference in energy efficiency, and let us be your partner in achieving optimal comfort and sustainability.

UL181, fireproof, durable, easy to customize

A phenolic insulation board is a type of closed-cell rigid foam created through a scientific process that involves combining different materials like phenolic resin, flame retardants, smoke suppressants, curing agents, foaming agents, and additional additives. Its primary benefits lie in its excellent fire resistance and thermal insulation properties.

Ul181 Listedphenolic Insulation Panel

Ul181 Listedphenolic Insulation Panei

“The American standard UL Super Insulation Phenolic Board utilizes high-performance, low thermal conductivity phenolic resin, with a core material featuring an interwoven ultra-fiber structure. The density reaches up to 60 kg/cubic meter, and the compressive strength of the board is as high as 190 kPa, surpassing standard phenolic boards in the market by 60%. It boasts a closed-cell rate of over 95% and a thermal conductivity as low as 0.019 W/(m·K) or less.”

Double-sided aluminum foil phenolic board
Ul 181 Phenolic Insulating Panel
  • The surface employs a 0.06-0.15mm nano-coated passivated aluminum sheet, which remains rust-free and corrosion-resistant during long-term use. It is also antimicrobial and resistant to acids and alkalis, offering exceptional flexibility and ductility.
  • The surface material utilizes E-Class grade fiberglass cloth as a protective layer, providing non-combustible and fire-resistant properties while also offering insulation and corrosion resistance.

Performance of Phenolic Insulation Board

  1. Excellent Fire Performance: Organic insulation materials such as polyurethane and polystyrene produce dense smoke and toxic fumes when burned, which can lead to casualties and increase the difficulty of firefighting. In contrast, phenolic foam insulation boards are non-combustible, with a fire performance rating of up to Class A. They can withstand temperatures of up to 180°C (allowing brief exposure up to 250°C). A 100mm thick phenolic foam can resist direct flame exposure for over one hour without penetration. When exposed to flames, it forms a ‘graphite foam’ layer on the surface, effectively protecting the foam structure inside; no charring, dripping, curling, or melting occurs.
  2. Excellent Thermal Insulation Performance: With a low thermal conductivity (<0.02 W/m·K, more than twice as low as polystyrene and similar to polyurethane), it is an outstanding material for insulation and heat resistance.
  3. Corrosion Resistance and Aging Resistance: It can withstand the corrosion of almost all inorganic acids, organic acids, and organic solvents. Long-term exposure to sunlight does not result in noticeable aging, making it environmentally friendly and offering good aging resistance.
  4. Low Density and Lightweight: It can reduce the self-weight of buildings, lower the structural load, and decrease construction costs. Additionally, it is easy to work with, allowing for simple and swift installation. It can be easily cut using sharp tools or fine-toothed saws, which enhances work efficiency.
  5. Sound Absorption Performance: Phenolic foam insulation boards exhibit excellent sound absorption capabilities, with the open-cell foam structure being particularly advantageous for sound absorption.
  6. Dimensional Stability and Precise Cutting: These boards maintain stable dimensions and can be precisely cut to achieve tight fits in situations such as between rafters.
  7. Highly Moisture Resistant: Moisture has minimal impact on its thermal performance.
  8. Diverse Product Specifications: Custom product sizes can be manufactured according to customer requirements.
  9. Aesthetic Appearance: The surface can be customized with various materials to suit specific environmental requirements. Currently, Weiteng offers customization options including single or double-sided aluminum foil (in silver, black, white, and blue), single or double-sided color-coated steel, PVC, felt, aluminum foil grids, galvanized steel, non-woven fabric, and canvas, among others.
  10. Long Service Life of up to 20 years with low wear and maintenance costs.
  11. Non-biodegradable but recyclable, allowing discarded materials to be reused in the production process.
  12. Performance of the four main types of rigid foam boards: Polyisocyanurate (PIR), Phenolic Foam (PF), Extruded Polystyrene (XPS) commonly known as polystyrene foam plastic, and Expanded Polystyrene (EPS).



Comparison of the Four Main Types of Rigid Foam Boards: Polyisocyanurate (PIR), Phenolic Foam (PF), Extruded Polystyrene (XPS) commonly known as polystyrene foam plastic, and Expanded Polystyrene (EPS).


1.HVAC: Precision-cut foam components, including half-sections, laminates, elbows, and more, with vapor barriers. High-density foam for structural use.

2.Architecture & Construction: Used in roofing, wall panels, insulation, and more. Recognized for exceptional fire protection, expanding market share.

3.Composite Panels: High-density phenolic foam core with steel facings, ideal for various applications like food processing, clean rooms, and cold storage, boasting excellent fire resistance.

4.Process/Petrochemical: Used for pipe, tank, and container insulation in industrial applications.

5.Specialized Use: Fire doors, highly fire-resistant panels, and insulation for ships, offshore structures, and submarines.

Phenolic foam’s development began in the 1990s, initially for military and aerospace use. Later adopted in civil aviation, maritime, and industrial sectors, it’s now prevalent in high-rises, hospitals, and sports facilities due to its fire protection qualities.


“Durable duct plate, precision-engineered for optimal airflow. Made of high-quality material, ensuring longevity and resistance to wear. Streamlined design guarantees easy installation and a seamless fit in your duct system.

Duct boards have excellent flame-retardant, fire-preserving, thermal insulation, sound-absorbing, anti-bacterial and mildew-proof properties. 

In the field of climate control, air conditioners stand out as a symbol of human innovation, ensuring optimal comfort under different environmental conditions. Central to the functionality of these systems is the often overlooked duct panel.


  • Thickness Options: Standard profiles of 20mm, 25mm, and 30mm, with customization available.
  • Robustness: Boasting a tensile strength of ≥1.1MPa and a compressive force of ≥0.18MPa.
  • Tailored Dimensions: Standard sizes range from 2000×1200 to 4000×1200 mm. Custom sizes available.
  • Efficient Airflow: Experience ≤1.2% air leakage and handle up to 15M/s airflow.
  • Aluminum Foil Choices: Options from 0.025 to 0.08 mm for heat and moisture management.
  • Superior Thermal Attributes: A resistance of 0.86m^2K/W and conductivity between 0.019-0.02W (mK).
  • Safety First: Smoke concentration ≤9, no toxic emissions, and a formaldehyde release of ≤0.5Mg/L.
  • Moisture Management: Absorption rates as low as ≤3.7%.
  • Stability & Tolerance: Withstands -150℃ to 150℃ and retains ≤2% stability at 70±2℃ over 48 hours.
  • Impressive Fire Resistance: Achieves >1.5 hours of resistance with an A fire rating.

Application of Duct Board:

Air Duct
Central Air Conditioning
Duct Board
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“Revolutionize your building’s energy efficiency with our exterior wall insulation panels. Crafted from premium materials, these panels provide optimal thermal resistance, ensuring year-round comfort. Their durable design stands up to harsh weather while enhancing aesthetic appeal. The perfect blend of functionality and design!”

In the realm of modern architecture and design, the application of exterior wall panels has emerged as a pivotal strategy to redefine urban landscapes. Not just mere protective layers against the elements, these panels serve as the skin of buildings, bridging the gap between structural demands and aesthetic aspirations. 

Exterior wall panels come in a myriad of materials—ranging from natural stone to metal, and even synthetic polymers—each bringing its unique texture, finish, and durability. Beyond the visual appeal, these panels play an instrumental role in enhancing thermal insulation, soundproofing, and often, sustainability.


  • Adaptability & Customization:
    Regular thickness spanning 30-220 mm, suitable for diverse wall types.
    Customizable dimensions up to 4000x1200mm.
    Aluminum foil thickness tailored to specific needs: 0.025, 0.04, 0.06, 0.08 mm.
  • Strength & Durability:
    Tensile strength of ≥1.1MPa ensures resilience.
    Core material density between 40-60 Kg/m for optimum durability.
    Compressive strength of ≥0.18MPa.
  • Thermal Properties:
    Impressive thermal resistance value of 0.86 m2K/W.
    Low thermal conductivity between 0.019-0.02 W(m/K).
    Heat resistance from -150℃ to 150℃.
  • Safety & Environmental Standards:
    Oxygen index of ≥ 45.
    Extended fire resistance time over 1.5 hours, with a fire protection grade of A2.
    Formaldehyde emission kept minimal at ≤0.5Mg/L.
    Smoke concentration of ≤ 9, with no toxic gas release.
  • Performance Metrics:
    Dimensional stability at ≤2% under 70±2℃ for 48 hours.
    Water absorption rate capped at ≤3.7%.
    Maximum airflow set at 15 M/s.

Application of exterior wall panels:

Application of Exterior Wall Panels​
Building Exterior Wall Panels
Exterior Wall Panels​
Paste Exterior Wall Panels​
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