Top ten precautions for home improvement waterproof materials

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1. How to estimate the amount of waterproof material needed?

The total quantity of waterproof coating required is calculated by multiplying the area to be coated by the amount of paint needed per square meter.

2. What is the typical usage per square meter for different types of waterproof materials?

According to Yuhong brand instructions, for a 1.5mm thick coating, the theoretical material usage is as follows:

  • Acrylic: 3 kg/m²
  • Polyurethane: Approximately 2 kg/m²
  • Polymer-based: Around 3 kg/m²
  • Flexible cement mortar: About 3 kg/m²

3. What should you consider when buying waterproofing materials?

The building materials market isn't always well-regulated, and there are many fake or low-quality products available. It's best to choose well-known brands that have environmental certifications like the China Environmental Label or CTC certification. These ensure the product meets safety and quality standards.

4. Why recommend purchasing from a building materials supermarket?

Supermarkets usually offer clear pricing and reliable supply, reducing the risk of counterfeit products. They also provide better return and exchange policies, which can be very helpful if any issues arise.

5. What’s the cost-effectiveness of different waterproof coatings?

Most waterproof coatings on the market that meet national standards are suitable for home use. Each has its own advantages:

  • Polyurethane: Excellent elasticity and film quality, but more expensive and takes longer to apply. Note that many products labeled as polyurethane may not be pure and could have poor environmental performance.
  • Acrylic: Easy to apply, eco-friendly, and reasonably priced – a popular choice for home projects.
  • JS Coating: Flexible and easy to work with, non-toxic, and environmentally friendly.
  • Cement Mortar: Strong film strength and good adhesion, ideal for tiling directly. However, it's rigid and not recommended for new houses that may settle over time.

In general, polyurethane offers the best performance, acrylic and JS coatings are the most cost-effective, and cement mortar is practical and economical.

6. What are the key factors when purchasing materials?

First, focus on the waterproofing performance. Second, prioritize environmental safety. Since waterproofing is a hidden project, using toxic materials can lead to long-term health risks. Always choose eco-friendly options.

7. How to buy eco-friendly waterproof coatings?

Look for products sold at formal building material stores that have passed environmental certifications like the China Environmental Label or CTC. These ensure safer and higher-quality products.

8. How to tell if a waterproof coating is genuine?

Check the packaging: it should be clear, with proper labeling, including product name, net weight, origin, and certifications. Well-known brands often have anti-counterfeit features, so pay attention when purchasing.

9. How to avoid being tricked when buying polymer coatings?

Many products are falsely labeled as "polymer" or "high molecular." The real polymer waterproofing material is called JS coating. Some manufacturers may mislead buyers by calling their products "GS high molecular," which is not reliable. Be cautious and check the price — genuine products usually cost more than 20 yuan per 20kg barrel.

10. How to determine if a waterproof material is good?

Evaluate based on three main factors: (1) No sedimentation or clumping in the coating; (2) No strong chemical smell; (3) Easy to apply during construction.

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