Honeywell SL1LMSTN Self-leveling Joint Sealant 28 Oz

Product Description

The HONEYWELL SL1LMSTN is a one-component, self-leveling elastomeric polyurethane sealant formulated for expansion joints in concrete floors, decks, and similar horizontal surfaces. Sold in a 28-ounce unit, it cures by reacting with atmospheric moisture — no primer required. The limestone-colored formula delivers flexibility, abrasion resistance, and puncture resistance across a wide range of commercial and industrial horizontal joint applications. Maximum application depth is 0.375 inches. No tooling is required, making installation straightforward for flooring contractors and concrete restoration crews working on tight schedules.

This sealant is recommended for expansion joints, pavers, plaza decks, industrial floors, driveways, sidewalks, decks, parking areas, and pitch pans on concrete or metal substrates. It is not recommended for vertical applications or locations subject to continuous water immersion. Typical users include commercial flooring contractors, concrete restoration specialists, and facilities maintenance crews working on horizontal joint sealing in both indoor and outdoor environments. USDA compliant for use in areas that handle meat and poultry, making it suitable for food-processing facility floor joints.

Key Features

• One-component formula cures with atmospheric moisture — no mixing or priming required
• Self-leveling application eliminates tooling step on horizontal surfaces
• Elastomeric polyurethane construction provides flexibility, abrasion resistance, and puncture resistance
• Limestone color blends with standard concrete finishes
• USDA compliant for meat and poultry handling areas
• Maximum application depth of 0.375 inches per installation

Compatibility

Designed for use on horizontal expansion joints in concrete and metal substrates including pavers, plaza decks, industrial floors, driveways, sidewalks, decks, parking areas, and pitch pans. Not suitable for vertical surfaces or areas with continuous water immersion.

Installation Notes

Installation is performed by flooring contractors or concrete restoration professionals on horizontal substrates only. Ensure the joint is clean, dry, and free of debris before application. Maximum fill depth must not exceed 0.375 inches; use a backer rod for deeper joints to control sealant depth. Allow adequate cure time based on ambient moisture levels before opening the surface to foot or vehicle traffic.

Technical Specifications

• Product Type: Self-Leveling Elastomeric Polyurethane Sealant
• Color: Limestone
• Container Size: 28 oz
• Maximum Application Depth: 0.375 inches
• Cure Method: Moisture cure
• Substrate Compatibility: Concrete, Metal
• Weight: 1.86 pounds
• Certifications: Federal Spec TTS-00230C Type 1 Class A; ASTM C 920 Type S Grade P Class 25 Use T M and O; Corps of Engineers CRD-C-541; CAN/CGSB 19.13-M87 Classification C-1-40-B-N and C-1-25-B-N No. 81028; USDA Compliant
• UPC: 00080492303599

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: SL1LMSTN