Description

The DAP INC 8787 is a 100% silicone, all-purpose window and door sealant formulated for maximum flexibility and long-term joint performance. Packaged in a 10.1 oz cartridge, it delivers a fully waterproof and weatherproof seal suitable for both interior and exterior applications. The silicone compound resists shrinking and cracking under extreme joint movement, making it a reliable choice for sealing around windows, doors, and other building envelope penetrations. It becomes water resistant within 30 minutes of application. Installers and contractors working on residential and light commercial projects will find this a dependable go-to sealant for a wide range of substrate types.

This sealant is designed for all-surface versatility across interior and exterior environments. It applies cleanly to common building materials and performs reliably in temperature conditions ranging from 40 to 120 degrees F during application. Low odor makes it practical for occupied spaces. Note that this product is not paintable, so surface color matching prior to application is recommended. It is sold in a package quantity of 12 cartridges per case, making it convenient for stocking on service vehicles or job sites with recurring sealing work.

Key Features

100% silicone formula resists shrinking, cracking, and extreme joint movement
Becomes water resistant in 30 minutes with a fully waterproof and weatherproof final seal
Application temperature range of 40 to 120 degrees F
All-surface versatility for use on glass, metal, wood, tile, and similar substrates
Low odor formula suitable for interior or exterior use
Not paintable gray color finish only
Backed by a lifetime durability guarantee

Compatibility

Designed as an all-purpose silicone sealant for window and door applications on residential and light commercial structures across a wide range of common building surface materials.

Installation Notes

This product is typically applied by general contractors, glaziers, plumbers, or HVAC technicians sealing penetrations and building envelope joints. Surface should be clean, dry, and free of old sealant or debris before application. Follow local building codes for sealant use in fire-rated or structural assemblies. Do not apply below 40 degrees F or above 120 degrees F, and allow adequate cure time before exposing the joint to water or mechanical stress.