Why Polyurethane Self Leveling Sealant Is Essential for Horizontal Joint Protection

The Role of Self Leveling Sealant in Infrastructure

In modern infrastructure and commercial construction, horizontal joints are highly vulnerable to movement, water penetration, and temperature fluctuation. Expansion joints in concrete roads, bridge decks, airport pavements, and industrial floors must withstand continuous dynamic stress. Selecting a high-performance self leveling sealant is essential to ensure long-term waterproofing and structural durability.

Self leveling sealant is specifically formulated for horizontal applications. Unlike non-sag sealants used on vertical joints, it flows naturally after placement, forming a smooth, uniform surface without tooling. This property ensures complete joint filling, minimizes air entrapment, and enhances overall sealing reliability.

Mechanical Performance and Movement Capability

Polyurethane self leveling sealant is known for its excellent elasticity and low modulus characteristics. With elongation at break exceeding 600%, it accommodates joint expansion and contraction caused by thermal variation and structural movement.

Its strong elastic recovery helps maintain joint integrity even under cold extension and hot compression conditions. This makes polyurethane self leveling sealant particularly suitable for heavy-duty concrete joint systems where repeated movement occurs over time.

Adhesion and Durability in Concrete Applications

Strong adhesion to porous substrates is critical in horizontal sealing applications. Polyurethane self leveling sealant bonds effectively to concrete surfaces and maintains stable tensile properties even after water immersion.

By preventing water infiltration, it protects joint edges from freeze-thaw damage, corrosion, and long-term deterioration. Its service temperature range and weather resistance allow it to perform reliably in demanding outdoor environments such as highways, bridges, and airport runways.

Typical Applications of Self Leveling Sealant

Self leveling sealant is widely used in:

• Concrete road expansion joints

• Bridge construction joints

• Airport runway sealing

• Parking deck joints

• Industrial floor systems

• General horizontal construction joints

In these environments, durability, elasticity, and leveling performance directly influence long-term structural safety.

Tengyu Polyurethane Self Leveling Sealant Solution

TP630 Self Leveling Polyurethane Sealant is a one-component, 25LM low modulus polyurethane sealant engineered for horizontal joint sealing.

It offers smooth leveling behavior, elongation above 600%, strong adhesion to concrete, and stable performance under dynamic stress conditions. Designed for infrastructure and heavy-duty construction projects, TP630 delivers reliable and durable joint protection.

Contact Tengyu

For technical data sheets, samples, OEM cooperation, or project consultation, please contact:

Contact Person: Jenny
Tel: +86 18615350735
WhatsApp: +86 13553116229
Email: jenny@sdsealant.com

Tengyu provides professional polyurethane self leveling sealant solutions for global construction and infrastructure projects.