MASTERSEAL SL1 LIMESTONE ONE COMPONENT SELF-LEVELING POLYURETHANE SEALANT CTG 825 MIL

Description

MasterSeal SL 1 (formerly known as Sonolastic SL 1) is a one-component, non-priming, elastomeric, self-leveling polyurethane sealant designed for expansion joints in concrete floors and decks.

MasterSeal SL 1 is engineered for commercial concrete contractors, industrial facility managers, and professional builders who require a durable, long-lasting expansion joint sealant for horizontal concrete surfaces. Whether used in parking structures, warehouse floors, sidewalks, or plazas, this sealant provides a seamless and resilient finish that moves with the concrete—ideal for high-traffic or weather-exposed environments.

Why It Matters

Concrete expands and contracts with temperature and load cycles. Without the right sealant, joints can fail—leading to cracking, water infiltration, and costly repairs. MasterSeal SL 1 delivers professional-grade protection with:

• Movement capability of ±35% allows expansion and contraction with joint movement
• Abrasion resistant to provide for longer wearing and durability
• Easy to gun for quick installation
• No priming needed on most surfaces, offering excellent adhesion
• Self-leveling sealant, so no tooling needed?

By using MasterSeal SL 1, contractors reduce rework, improve jobsite efficiency, and ensure a clean, professional finish that lasts.

How It Works

MasterSeal SL 1 is a one-component polyurethane sealant that comes ready to apply—no mixing required. After gunning directly into clean, prepared joints, it flows and levels itself, filling expansion and control joints in concrete floors and decks. Once cured, it forms a flexible, watertight, and chemical-resistant elastomeric seal that withstands traffic, vibration, and environmental stress.

This sealant bonds tightly to most concrete and masonry surfaces without primer and can be painted or coated after curing for uniform aesthetics. Its abrasion resistance and chemical stability make it suitable for both indoor and outdoor concrete construction.

Key Features

• One-component, non-priming polyurethane formulation
• Self-leveling, no tooling required
• ±35% joint movement capability
• Excellent adhesion and flexibility
• Resistant to abrasion, chemicals, and weathering
• Ideal for horizontal joints in concrete floors, decks, and pavements