3M 7000121486 Polyurethane Adhesive Sealant 550 Fast Cure Gray

Product Description

The 3M 7000121486 is a fast-curing polyurethane adhesive sealant designed to seal and bond a wide range of substrates in demanding trade and construction applications. Sold in a 10.5 fluid ounce cartridge, this product delivers strong adhesion and flexible sealing in a single application. The fast-cure formulation reduces wait time on the job, making it suitable for work where quick return-to-service is a priority. It bonds to concrete, wood, aluminum, most lacquered metals, polyester, glass, and stone, among other common substrates. The gray color blends with concrete and metal surfaces. Weighing 0.88 pounds, the standard cartridge fits most manual and pneumatic caulk guns.

This polyurethane sealant is used across HVAC, plumbing, electrical, and general construction trades wherever a flexible, adhesive-grade seal is needed. Typical applications include sealing penetrations in concrete and masonry, bonding dissimilar materials, and weatherproofing joints in metal and wood assemblies. It is well-suited for both interior and exterior use where substrate movement or vibration is a factor. Contractors, service technicians, and installers working on residential and light commercial projects will find the cartridge format convenient for controlled, mess-free dispensing.

Key Features

• Fast-cure polyurethane formula reduces downtime between application and return to service
• Bonds and seals in a single step across multiple substrate types
• Adheres to concrete, wood, aluminum, lacquered metals, polyester, glass, and stone
• Gray color suits concrete and metal surface applications
• Standard 10.5 fluid ounce cartridge compatible with common caulk guns
• Flexible cured bead accommodates substrate movement and vibration

Compatibility

Designed as a general-purpose adhesive sealant for use on concrete, wood, aluminum, most lacquered metals, polyester, glass, and stone substrates in residential and commercial construction and trade service applications.

Installation Notes

Application is typically performed by the installing trade using a standard manual or pneumatic caulk gun. Surfaces should be clean, dry, and free of dust, oil, and loose material before application. Follow all applicable local building codes and manufacturer surface-preparation guidance. Ensure adequate ventilation during application and avoid skin and eye contact with uncured material.

Technical Specifications

• Volume: 10.5 fluid ounces
• Weight: 0.88 pounds
• Color: Gray
• Formula Type: Polyurethane
• Cure Speed: Fast Cure
• Container Type: Cartridge
• UOM: Each
• UPC: 00048011627991

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121486