**Drying time** (25℃)

| Surface drying: ≤2 hours; Actual drying: ≤24 hours (specific time is adjusted according to ambient humidity and temperature) |

| **Adhesion** | ≤Level 1 (tested by cross-hatch method, in line with GB/T 9286 standard) |

 | **Wear resistance** | ≤0.02g (500g/1000 rpm, in line with GB/T 1768 standard) |

| **Impact Resistance** | No cracking or peeling at a height of 50cm (conforms to GB/T 1732 standard) |

| **Chemical Resistance** | Water resistance, acid resistance (10% H₂SO₄), and alkali resistance (5% NaOH), no significant change after soaking for 48 hours |

 | **Hardness** | ≥2H (pencil hardness method, in line with GB/T 6739 standard) |

 | **VOC content** | ≤100g/L (in line with environmental protection standards, such as GB/T 38597-2020) |

 | **Storage Stability** | In the unopened state, it can be stored in a sealed container at room temperature for ≥12 months without delamination or agglomeration | --- ###

**2. Construction precautions** #### **

1. Base treatment** - **Cleaning requirements**: The surface of the base must be smooth, dry, free of oil, dust, loose particles, etc., and the moisture content should be ≤8%. - **Repair and Grinding**: Fill the cracks and holes, and use a grinder to grind the entire surface to a uniform roughness. - **Acid washing or shot blasting**: It is recommended to pickle or shot blast the concrete base layer to enhance adhesion. #### **

2. Environmental conditions** - **Temperature**: The construction environment temperature is recommended to be 5℃~35℃. Avoid low or high temperature operations. - **Humidity**: Relative humidity ≤75%. Too high may cause the paint film to turn white and delay curing. - **Ventilation**: Maintain good ventilation, but avoid direct strong winds to prevent the paint film surface from drying too quickly.

3. Add 10% water, stir evenly and then apply, the dosage is 0.05kg per square meter.

4. **Maintenance time**: After the construction is completed, it needs to be cured for more than 2 days before it can be put into use. During this period, avoid heavy pressure or flooding. #### **

5. Precautions** -

**Proportion and mixing**: Strictly follow the product instructions (if it is a two-component product), stir thoroughly and avoid air bubbles. -

**Tool Cleaning**: Clean tools with water immediately after use to prevent paint from curing. 

- **Inter-layer treatment**: Before each layer of painting, make sure that the previous coating is completely dry, and sand it if necessary to enhance adhesion. 

- **Avoid contamination**: During the construction process, dust, water droplets or impurities must be prevented from falling into the uncured paint film. 

- **Special Areas**: Corners, gaps, pipes and other areas need to be treated carefully to avoid missing paint.

Water-based Polyurethane Topcoat Product Introduction

1. What is Water-based Polyurethane Topcoat?

A water-based polyurethane topcoat is a high-quality protective coating that provides a durable and aesthetically pleasing finish to a variety of surfaces. Unlike traditional oil-based polyurethane, which uses solvents for application and curing, water-based polyurethane relies on water as its primary solvent. This makes it a more eco-friendly and safer alternative, with reduced levels of volatile organic compounds (VOCs) that contribute to air pollution and health hazards.

Water-based polyurethane topcoats are commonly used to protect wood surfaces, such as wood floors, furniture, cabinetry, and trim, but can also be applied to concrete, metal, and plastic. They create a clear, hard-wearing finish that resists scratches, stains, and moisture, while maintaining the natural look and beauty of the underlying material.

This product offers a range of advantages, including faster drying times, easier clean-up, and superior clarity, making it a popular choice for both professionals and DIY enthusiasts. With its exceptional performance in residential, commercial, and industrial applications, water-based polyurethane topcoat is a versatile solution for anyone looking to protect and beautify their surfaces.

2. Key Features of Water-based Polyurethane Topcoat

2.1 Eco-friendly and Low VOC

One of the key features of a water-based polyurethane topcoat is its eco-friendliness. Traditional polyurethane products contain high levels of volatile organic compounds (VOCs), which can harm both the environment and human health. VOCs are released into the air as the product dries, contributing to air pollution, respiratory issues, and headaches.

Water-based polyurethane topcoats, on the other hand, have significantly lower levels of VOCs, making them a safer choice for both the applicator and the environment. The reduced presence of VOCs also means fewer harmful fumes during application, allowing for better indoor air quality. This makes water-based polyurethane topcoats ideal for use in residential spaces, schools, hospitals, and offices, where air quality is a significant concern.

2.2 Fast Drying and Quick Recoat Time

Water-based polyurethane topcoats are known for their quick drying times. Unlike oil-based polyurethanes, which can take hours to dry and require long curing periods, water-based versions typically dry to the touch within 1–2 hours, and can be recoated within 4–6 hours. This feature greatly reduces downtime and allows multiple coats to be applied in a single day.

The fast drying time also helps to speed up project completion, making it an excellent choice for both commercial and residential applications where time constraints are a factor. Moreover, the fast recoat time allows for efficient layering of the finish to ensure optimal protection and a smooth, flawless surface.

2.3 Superior Clarity and Aesthetic Appeal

Water-based polyurethane topcoats are known for their superior clarity, which allows the natural beauty and grain of the wood or other substrates to shine through. Unlike oil-based polyurethanes, which can yellow over time, water-based polyurethanes maintain their clarity and remain clear even after years of exposure to sunlight. This makes them especially ideal for wood furniture, cabinetry, and flooring, where the natural color and grain are important.

In addition to maintaining the integrity of the substrate, water-based polyurethane topcoats can be formulated in different finishes, including matte, satin, and gloss. This allows you to select the perfect sheen for your project, whether you're looking for a subtle, low-gloss finish or a high-gloss, glossy look.

2.4 Durability and Scratch Resistance

Water-based polyurethane topcoats offer excellent durability. Once cured, they form a hard, durable surface that resists scratches, stains, scuffs, and wear. This makes them a great option for high-traffic areas like wood floors, kitchen cabinets, and countertops.

In addition to its physical resistance, water-based polyurethane also provides excellent moisture resistance, protecting surfaces from spills, humidity, and cleaning. It creates a protective barrier that prevents liquids from penetrating the surface, reducing the likelihood of warping, swelling, or discoloration.

2.5 Low Odor and Easy Clean-Up

Another major advantage of water-based polyurethane is its low odor. Traditional oil-based finishes emit strong, often unpleasant smells due to the high concentration of solvents. Water-based polyurethane, however, has minimal odor, making it a more pleasant and safe option for both applicators and the people living or working in the space.

Additionally, clean-up is much easier with water-based polyurethane topcoats. Unlike oil-based polyurethanes, which require solvents like mineral spirits or turpentine for cleaning brushes and tools, water-based versions can be cleaned up with just soap and water. This not only makes post-application clean-up faster and more convenient but also eliminates the need for harsh chemicals, making it a safer option for the environment.

2.6 Long-lasting Finish

Water-based polyurethane topcoats provide a long-lasting finish that protects the surface from daily wear and tear. This makes them a smart investment for both residential and commercial spaces, where high levels of durability are needed. Whether applied to wood floors, furniture, or countertops, a high-quality water-based polyurethane finish will maintain its protective qualities for years with minimal maintenance.

The finish resists dirt, dust, and stains, which helps to keep the surface looking clean and fresh. Additionally, the finish is highly resistant to fading, so it retains its aesthetic appeal over time, even in areas exposed to sunlight.

3. Applications of Water-based Polyurethane Topcoat

Water-based polyurethane topcoat is suitable for a wide range of applications, thanks to its versatility and durable protective qualities. Below are some of the most common uses for this type of finish:

3.1 Wood Flooring

Water-based polyurethane topcoat is one of the most popular finishes for wood flooring. Whether you're installing oak, pine, maple, or other types of wood flooring, a water-based polyurethane topcoat provides a clear, protective finish that enhances the natural beauty of the wood grain while offering superior wear resistance. It is ideal for both residential and commercial flooring applications.

The quick drying time allows for faster project completion, and the low VOC content makes it safe for indoor use in homes, offices, and retail spaces. The scratch and stain resistance ensures that the floor remains beautiful and functional for years to come.

3.2 Furniture and Cabinets

Water-based polyurethane topcoat is an excellent choice for protecting wood furniture and cabinets. It enhances the natural color and grain of the wood, providing a smooth, clear finish that resists yellowing over time. The durable surface protects the furniture from scratches, stains, and moisture, making it ideal for high-use areas like kitchens, dining rooms, and bathrooms.

Additionally, water-based polyurethane provides a more environmentally friendly option for refinishing or restoring antique or modern wood furniture, offering a sleek, durable finish with less odor and fewer fumes during application.

3.3 Wooden Doors and Trim

Wooden doors and trim are subject to wear and tear from daily use, which makes them a prime candidate for protection with a polyurethane topcoat. Water-based polyurethane not only provides a durable, moisture-resistant barrier but also enhances the appearance of the wood, making it look fresh and well-maintained.

The quick-drying nature of water-based polyurethane also makes it easier to apply multiple coats in a single day, ensuring a smooth, uniform finish that will hold up to the rigors of daily life.

3.4 Countertops

Wooden countertops, especially those in kitchens and bathrooms, are prone to moisture damage, staining, and scratching. Applying a water-based polyurethane topcoat helps protect these surfaces from everyday wear and tear while preserving their natural beauty. The moisture-resistant and stain-resistant properties make it a great option for areas with frequent exposure to liquids and food spills.

Water-based polyurethane finishes are also safe for use in food preparation areas, as they do not contain harmful chemicals or strong odors that could compromise food safety.

3.5 Concrete and Other Surfaces

In addition to wood surfaces, water-based polyurethane topcoat can be used on other substrates like concrete, metal, and masonry. This versatility makes it suitable for a variety of commercial and industrial applications, including warehouse floors, parking garages, and industrial equipment.

When applied to concrete, it provides a clear, durable finish that resists stains, oil, and abrasion while enhancing the surface’s aesthetic appeal. It also offers UV resistance, making it suitable for outdoor applications, such as patios and balconies.

4. Advantages and Disadvantages of Water-based Polyurethane Topcoat

4.1 Advantages

• Eco-friendly: Low VOC content, safer for the environment and indoor air quality.

• Quick drying: Fast drying and recoating times, ideal for projects with time constraints.

• Clear finish: Maintains the natural look of wood and resists yellowing.

• Durable: Scratch, stain, and moisture-resistant, ideal for high-traffic areas.

• Easy cleanup: Requires only soap and water for cleaning tools.

• Low odor: Minimal fumes during application, making it more pleasant to work with indoors.

• Versatile: Suitable for wood, concrete, metal, and more.