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polyurethane structural adhesive

Polyurethane Structural Adhesive

Need a cleaner, stronger alternative to screws or welds? Our polyurethane structural adhesive delivers high-strength, flexible bonds that stand up to vibration, impact, and harsh environments. Available in one- and two-component formulas, it gives you control over curing speed and application conditions. Whether you’re working in automotive, aerospace, construction, or electronics, this adhesive helps you create long-lasting, integrated assemblies that resist heat, humidity, and chemicals—streamlining your process while boosting performance.

Table Of Contents For This Page

It’s not easy to cover everything about laminating adhesives, so we’ve prepared a lot of information on this page for you to learn more about. To ensure you can quickly find the information you need, we’ve prepared this table of contents, which will jump to the corresponding location when you click on it.

Product Overview

Features

Product Model

Application Scenario

Specifications

FAQs

Product Overview

Our polyurethane structural adhesives come in two types: two-component and single-component moisture-curing.

  • Two-Component Adhesives require mixing and offer high-strength bonding, ideal for aluminum doors and windows, concealed door handles, sintered stone panels, and general spot bonding.

  • Single-Component Adhesives cure with ambient moisture, making them easy to use for aluminum doors and windows, light steel villa wall panels, small components, and general spot bonding.

polyurethane adhesive

Features

Strong adhesion

Ensures a durable bond between materials like metal, wood, plastic, and composites.

Flexibility

Accommodates thermal expansion and prevents cracking or delamination.

Weather resistance

Withstands moisture, temperature changes, and UV exposure, making it suitable for indoor and outdoor use.

Impact resistance

Absorbs shock and vibration, enhancing durability.

Chemical resistance

Performs well in industrial and construction environments.

Low VOC & eco-friendly

Some formulations are solvent-free, meeting environmental standards.

Product Model

PU-T308 Two-Component Polyurethane Assembly Adhesive

Looking for a simple, reliable way to bond structural components? Our 1K Polyurethane Assembly Adhesive gives you high-strength performance with no mixing required. It offers excellent adhesion and durability, standing up to moisture, temperature shifts, and daily wear. Ideal for general assembly across industries, it helps you streamline production while ensuring long-lasting results.

2k
1k

8# Single-Component Polyurethane Assembly Adhesive

Need a fast, hassle-free bonding solution for your assembly work? Our Single-Component Polyurethane Assembly Adhesive cures with ambient moisture, giving you strong, durable bonds without mixing. It offers excellent flexibility and adhesion on a wide range of materials, while resisting moisture, temperature changes, and daily stress—making it ideal for industrial and construction applications where reliability matters.

Two-Component Thermally Conductive Potting Compound

Struggling with overheating or short-circuit risks in your electronics? Our 2K Thermally Conductive Potting Compound offers reliable thermal management and electrical insulation, helping you protect sensitive components from heat, moisture, and vibration. Its efficient heat dissipation improves performance and extends product lifespan—ideal for high-demand electronic applications where stability and durability are non-negotiable.

2k thermally conductive potting compound

Caulking Gun

Manual Applicator Guns:

  • Operation: Require physical effort to dispense adhesive.​

  • Ideal For: Small-scale or detailed applications requiring precision.​

Pneumatic Applicator Guns:

  • Operation: Utilize compressed air for dispensing adhesive.

  • Ideal For: Large-scale or continuous applications needing efficiency.

Application Scenario

RUR-33 Two-Component Polyurethane Assembly Adhesive

  • Aluminum Window & Door Corner Bonding – Provides strong and durable joints for aluminum frames.

  • Aluminum Profile Edge Sealing – Ensures seamless and secure sealing for aluminum extrusions.

  • Concealed Door Handle Bonding – Offers a clean, invisible bond for modern handle designs.

  • Sintered Stone Panel Installation – Delivers high-strength adhesion for heavy panel mounting.

  • General Spot Bonding – Suitable for various materials requiring precise and reliable adhesion.

8# Single-Component Polyurethane Assembly Adhesive

  • Aluminum Window & Door Corner Bonding – Ensures secure and long-lasting joints for aluminum frames.

  • Light Steel Villa Wall Panel Bonding – Provides strong adhesion for structural wall assembly.

  • Small Component Bonding – Ideal for precision bonding in manufacturing and assembly.

  • General Spot Bonding – Suitable for a wide range of materials requiring fast and reliable adhesion.

Two-Component Thermally Conductive Potting Compound

  • High-Power Electronic Components: Ensures effective heat dissipation and insulation for devices like power amplifiers and inverters.​

  • Power Modules with High Insulation and Temperature Requirements: Offers robust protection for modules operating under demanding conditions.​

  • Electronic Devices Requiring Heat Transfer to Enclosures or Heat Sinks: Facilitates efficient thermal conduction, preventing overheating.​

  • High-Frequency Transformers and Communication Modules: Provides insulation and thermal management, enhancing performance and durability.​

  • LED Drivers and High-Power LED Assemblies: Improves heat dissipation, ensuring optimal functionality and extending service life.

Specifications

Single-Component Polyurethane Adhesive Parameters:
ParameterValue/Description
AppearanceBlack
Curing MethodMoisture curing
Open Time50 - 70 minutes
Curing TimeAbout 50 - 70 minutes at room temp
Solvent ContentSolvent-free
Typical ApplicationsLaminated elements with porous materials
Two-Component Polyurethane Adhesive Parameters:
ParameterValue/Description
Component A (Resin):
- AppearanceMilky white paste
- Viscosity10,000 ± 2,000 mPa·s
- Density1.52 ± 0.05 g/cm³
Component B (Hardener):
- AppearanceBrownish-yellow liquid
- Viscosity500 ± 100 mPa·s
- Density1.25 ± 0.05 g/cm³
Mixing Ratio (A:B)4:1 (by weight)
Mixed Viscosity2,500 ± 500 mPa·s
Pot Life75 ± 25 minutes
Initial Bonding Time~6 hours (25°C)
Full Curing Time7 days
Tensile Shear Strength (Al-Al)>3.5 MPa
Tensile Strength (on inorganic boards)≥0.1 MPa (rock wool)
Service Temperature Range-40~120°C
Typical ApplicationsBonding decorative construction materials (sandwich panels, metals, rock wool, etc.)

FAQs

1. What are polyurethane adhesives, and how do they work?

Polyurethane adhesives are versatile bonding agents formulated by reacting polyols with isocyanates. This chemical reaction forms a strong polyurethane polymer network that adheres to various substrates. Polyurethane adhesives work by forming molecular bonds between the adhesive and the substrate, providing strong and durable adhesion.

Polyurethane adhesives offer several advantages, including strong bonding strength, flexibility, durability, resistance to chemicals and environmental factors, versatility, wide temperature range, and excellent mechanical properties. These properties make them suitable for a wide range of bonding applications.

Polyurethane adhesives can bond to a wide variety of substrates, including metals, plastics, wood, glass, ceramics, composites, and foams. They can also bond dissimilar materials together, making them versatile for bonding different types of surfaces.

Polyurethane adhesives can be applied using methods such as brushing, rolling, spraying, or dispensing with a caulking gun. It’s essential to follow the manufacturer’s instructions for proper surface preparation, application technique, and curing conditions to achieve optimal bonding results.

The curing time for polyurethane adhesives varies depending on factors such as temperature, humidity, substrate type, and adhesive formulation. Generally, polyurethane adhesives cure within a few hours to several days, with full cure achieved over 24 to 72 hours.

Yes, polyurethane adhesives are typically waterproof and exhibit excellent resistance to moisture. They can withstand exposure to water, humidity, and other environmental conditions without compromising their bonding performance.

Yes, polyurethane adhesives can be painted over once fully cured. However, it’s essential to ensure that the adhesive is completely cured and free of contaminants before applying paint. Some formulations may require surface preparation or priming for optimal paint adhesion.

Yes, polyurethane adhesives are suitable for outdoor applications due to their durability, weather resistance, and UV stability. They can withstand exposure to sunlight, rain, temperature fluctuations, and other environmental factors without degrading or losing adhesion.

When used according to manufacturer instructions, polyurethane adhesives are generally safe to use. However, it’s essential to follow proper handling, storage, and safety precautions to minimize exposure to uncured adhesive, which may contain potentially harmful chemicals. Adequate ventilation and personal protective equipment (PPE) should be used when handling polyurethane adhesives.

While polyurethane adhesives provide strong and durable bonds, they can be removed using mechanical methods such as sanding, scraping, or heat application. Chemical solvents or adhesive removers may also be used, but it’s essential to test them on a small, inconspicuous area first to ensure compatibility with the substrate and to follow safety precautions.

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