BOSS 535 Polyurethane Sealant 10.1 oz Black Construction Caulk

BOSS 535 Polyurethane Sealant 10.1 oz Black Construction Caulk

The BOSS 535 Polyurethane Sealant is a professional-grade, one-component sealant designed for high-performance sealing and bonding in construction applications. This polyurethane formula provides excellent adhesion and long-lasting flexibility, making it ideal for demanding interior and exterior sealing jobs.

In simple terms: This is a heavy-duty flexible caulk used for sealing concrete, masonry, and construction joints where durability and movement are required.

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Best For

• Concrete and masonry joints: Expansion and control joints.
• Exterior sealing: Weatherproofing building joints.
• Construction applications: Structural and general sealing.

Key Benefits

• Polyurethane formula: Superior durability compared to standard caulks.
• High flexibility: Accommodates joint movement and expansion.
• Strong adhesion: Bonds to concrete, masonry, metal, and wood.
• Waterproof seal: Protects against moisture and weather exposure.
• Paintable: Can be painted after curing for a finished look.
• Interior and exterior use: Suitable for a wide range of jobsite conditions.

Typical Uses

• Sealing expansion joints in concrete
• Masonry and brick joint sealing
• Exterior building envelope sealing
• Sealing around doors, windows, and frames
• General construction and structural joints

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Specifications

Brand	BOSS
Product Name	535 Polyurethane Sealant
Type	Polyurethane Sealant
Size	10.1 oz Cartridge
Color	Black
Application	Interior and Exterior
Paintable	Yes

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Installation Notes (Best Practice)

• Surface prep: Ensure surfaces are clean, dry, and free of contaminants.
• Application: Apply using a standard caulking gun.
• Joint design: Use proper joint depth and backing where required.
• Curing: Allow adequate curing time before exposing to stress or moisture.

Common Questions

Q: What makes polyurethane sealant different?
A: Polyurethane provides higher durability, stronger adhesion, and better flexibility compared to standard acrylic or silicone caulks.

Q: Can this be used outdoors?
A: Yes. It is designed for both interior and exterior construction applications.

Q: Is this paintable?
A: Yes. The sealant can be painted after it fully cures.