3M 7100200170 Urethane Joint Sealant 10.5 Oz Gray

Product Description

The 3M 7100200170 is a urethane joint sealant from the 3M Series 525 line, packaged in a 10.5 oz cartridge and finished in gray. It is a single-component, paintable sealant designed to seal joints and gaps in a range of construction and mechanical applications. The sealant meets ASTM C-920 Type S Grade NS Class 25 and NSF R2 standards, making it appropriate for use where code-compliant joint sealing is required. Tack-free dry time is 150 minutes, with a full cure time of 24 hours. Application temperature ranges from 40 to 95 degrees F, and the cured sealant remains flexible and serviceable from -22 to 176 degrees F.

This sealant is suited for sealing expansion joints, penetrations, and transitions in residential and commercial construction. It adheres directly to fiberglass, metal, plastic, and wood substrates without a primer in most cases. Typical applications include HVAC duct penetrations, plumbing rough-in, and general building envelope sealing where a flexible, durable, paintable seal is required. It is installed using a standard caulk gun compatible with 10.5 oz cartridges.

Key Features

• Urethane chemistry provides long-term flexibility and adhesion across substrate types
• Paintable after tack-free dry time of 150 minutes
• Meets ASTM C-920 Type S Grade NS Class 25 and NSF R2 standards
• Adheres to fiberglass, metal, plastic, and wood
• Service temperature range from -22 to 176 degrees F
• Full cure achieved in 24 hours

Compatibility

Designed for use on fiberglass, metal, plastic, and wood substrates. Suitable for joint sealing applications requiring compliance with ASTM C-920 Type S Grade NS Class 25 and NSF R2.

Installation Notes

Surface preparation is critical — substrate surfaces should be clean, dry, and free of oil, dust, and loose material before application. Apply only when ambient and surface temperatures are between 40 and 95 degrees F. Do not apply to wet surfaces or in conditions where rain is expected before the sealant reaches tack-free cure. Installers should follow applicable building codes and refer to the product safety data sheet for personal protective equipment requirements.