What is the Differences Between Water-Based and Solvent-Based Polyurethane Waterproof Coatings?
Polyurethane waterproof coatings are reactive curing (moisture-cured) materials widely used for roofing, bathrooms, basements, and other areas. They offer strong adaptability to substrate deformation. With advancements in technology, water-based polyurethane waterproof coatings have gradually taken a larger share of the waterproofing market. However, solvent-based polyurethane coatings are still commonly used in many applications. So, what exactly are the differences between the two?
Key Differences Between Water-Based and Solvent-Based Polyurethane Waterproofing
1. Different Dispersion Mediums
Water-Based Polyurethane Waterproofing: Uses water as the dispersion medium instead of organic solvents.
Solvent-Based Polyurethane Waterproofing: Uses organic solvents such as isocyanates and polyether as the dispersion medium.
2. Different Colors
Water-Based Polyurethane Coating: Typically light yellow in color.
Solvent-Based Polyurethane Leak Seale: Usually dark brown. This is the most visually noticeable difference between the two.
3. Different Applications
Water-Based Polyurethane Waterproofing: Has a high water absorption capacity and large penetration radius, making it suitable for sealing water seepage in dynamic water layers, shallow soil, and surface layers for consolidation and protection.
Solvent-Based Polyurethane Waterproofing: Commonly referred to as "cyanate grout" in China, forms a solid body with high strength and excellent impermeability, ideal for foundation reinforcement and dual-function projects requiring both waterproofing and leak sealing.
4. Different Elasticity of the Solidified Material
Water-Based Polyurethane Waterproofing: The solidified material is highly elastic, making it suitable for leak-proofing and sealing dynamic joints in concrete structures.
Solvent-Based Polyurethane Waterproofing: The solidified material has lower elasticity, better suited for sealing static joints and structural reinforcement in concrete.
Choosing the appropriate type according to their respective properties will ensure better waterproofing performance.
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