Boss Pro | 142929 | 28 oz Gray 822 Expansion Joint Sealant

The Boss Pro 142929 822 Expansion Joint Sealant is a one-component, self-leveling sealant formulated for horizontal expansion joints in pool decks, patios, driveways, sidewalks, and other concrete surfaces. Packaged in a 28 oz cartridge, this gray sealant flows easily into joints and cracks, curing at room temperature to form a durable, flexible rubber seal that resists weathering and joint movement.

Designed for professional construction and repair applications, Boss 822 provides excellent adhesion to concrete, masonry, wood, vinyl, glass, and many plastics. Its self-leveling formulation creates a smooth, permanent seal while maintaining flexibility through changing weather conditions.

━━━━━━━━━━━━━━━━━━

Key Features

• 28 oz cartridge of self-leveling expansion joint sealant

• Gray finish for decorative concrete applications

• One-component, ready-to-use formula

• Flexible seal accommodates ±25% joint movement (50% total)

• Excellent adhesion to concrete, masonry, wood, vinyl, glass, and many plastics

• Ideal for pool decks, patios, sidewalks, driveways, and expansion joints

━━━━━━━━━━━━━━━━━━

Product Overview

Boss Pro 822 Expansion Joint Sealant is engineered to provide a long-lasting, flexible seal for horizontal expansion joints exposed to moisture, temperature changes, and regular movement. Its free-flowing consistency fills properly prepared joints without tooling, producing a smooth finish that resists cracking, vibration, ozone, thermal expansion, and weather extremes. The cured sealant remains flexible in temperatures ranging from -85°F to 400°F (-65°C to 204°C).

Suitable for residential and commercial concrete applications, this gray sealant is commonly used around swimming pools, patios, walkways, and driveways where durable expansion joint protection is required. For best performance, install in clean, dry joints using the appropriate backer rod and follow the manufacturer's application and curing recommendations.