Boss Products 142900 Multi-seal Construction Sealant 9.5 Oz White

Product Description

The BOSS PRODUCTS 142900 is a multi-seal building construction sealant formulated from ultra synthetic polymer, packaged in a standard 9.5-ounce cartridge in white. It is engineered for general-purpose sealing applications across a wide range of building construction and trade work. The sealant performs across an operational temperature range of -40 degrees F to 200 degrees F and can be applied at temperatures as low as -35 degrees F. It carries ratings to TT-S-000230C and ASTM C920 Class 25, making it appropriate for specification-driven projects. HVAC technicians, plumbers, electricians, and general contractors typically install this type of sealant during rough-in and finish work.

The 142900 sealant is suited for sealing gaps, penetrations, and joints in residential and commercial construction. It is commonly used where a flexible, durable, UV-resistant seal is needed around building envelope penetrations, mechanical rough-ins, and general construction joints. The white color makes it appropriate for interior and exterior applications where finished appearance matters. Its ultra synthetic polymer composition provides long-term adhesion and flexibility across a broad range of substrates commonly encountered in trade work.

Key Features

• Ultra synthetic polymer composition provides flexible, durable adhesion across substrates
• Temperature range of -40 degrees F to 200 degrees F suits demanding mechanical applications
• UV resistant formulation for exterior and exposed installations
• Meets TT-S-000230C and ASTM C920 Class 25 ratings for specification compliance
• Application temperature range down to -35 degrees F allows cold-weather installation
• Manufactured in the USA with a shelf life of 1 year from date of shipment

Compatibility

Designed as a general-purpose construction sealant compatible with a wide range of substrates typical in residential and commercial building construction, including applications requiring ASTM C920 Class 25 rated sealants.

Installation Notes

This sealant is installed by licensed tradespeople including HVAC technicians, plumbers, and electricians as part of penetration sealing and joint work. Surfaces should be clean, dry, and free of oil or dust before application. Full cure takes 7 days — avoid disturbing the joint or exposing the bead to water during the cure period. This product is subject to California Proposition 65 requirements; review applicable safety data before use in California jobsites.

Technical Specifications

• Size: 9.5 ounces
• Volume: 10.3 fl oz
• Color: White
• Composition: Ultra Synthetic Polymer
• Type: General Purpose
• Temperature Range: -40 degrees F to 200 degrees F
• Application Temperature: -35 degrees F to 140 degrees F
• Flash Point Temperature: 392 degrees F
• Dry Time: 7 days
• UV Resistant: Yes
• Ratings: TT-S-000230C; ASTM C920 Class 25
• Shelf Life: 1 year from date of shipment
• Height: 11.25 inches
• Width: 2 inches
• Length: 2 inches
• Weight: 0.8 pounds
• Prop 65: Yes
• Country of Origin: USA

Standard Information

• Brand: BOSS PRODUCTS
• Manufacturer Part Number: 142900