PU Sealant vs Neutral Silicone Sealant – How to Choose the Right One?

Introduction

Both PU Sealant and Neutral Silicone Sealant are widely used in construction and industrial sealing applications.

However, they are designed for different functional priorities:

Choosing the right sealant depends on whether your project requires strong adhesion and load-bearing capacity, or long-term weather resistance and flexible sealing performance.

Quick Selection Guide

✅ Need strong bonding strength and load-bearing performance?

→ Choose PU Sealant

✅ Focus on weather resistance and long-term sealing?   

→ Choose Neutral Silicone Sealant

How to Choose the Right Sealant

Choose PU Sealant if your project involves:

• High bonding strength or structural adhesion
• Heavy substrates such as concrete, metal, stone
• Floors, roads, expansion joints or load-bearing areas

Choose Neutral Silicone Sealant if your project focuses on:

• Long-term outdoor sealing performance
• High resistance to UV, temperature changes, and weathering
• Curtain walls, windows, facades, and building envelopes
• Applications prioritizing flexibility rather than bonding strength

Typical Application Examples

Professional Recommendation

PU Sealant and Neutral Silicone Sealant are not substitutes. In many construction projects, they are used together to achieve optimal performance.