Krylon WL099111B Silicone Sealing Compound 12 Oz

Product Description

The KRYLON WL099111B is a black silicone sealing compound packaged in a 12 oz cartridge. It forms a flexible, durable seal across a wide operating temperature range of -50 degrees F to 375 degrees F, making it suitable for both cold-climate and high-heat applications. The compound adheres to ceramic, glass, metal, painted surfaces, plastic, rubber, and wood. It is paintable once cured, which adds versatility for finish work. HVAC technicians, plumbers, and general contractors use this type of product to seal joints, seams, and openings where thermal cycling and moisture exposure demand a resilient, long-lasting seal.

This silicone sealing compound is appropriate for residential and light commercial applications involving doors, windows, gutters, and mechanical system penetrations. It can be applied at temperatures as low as -20 degrees F, allowing for year-round use in cold-weather field conditions. The wide substrate compatibility makes it a practical choice for mixed-material assemblies where a single sealant must bond to more than one surface type. Licensed tradespeople and experienced DIYers working on weatherization, duct penetrations, or plumbing rough-ins will find this a reliable general-purpose option.

Key Features

• Silicone chemistry provides a flexible seal resistant to thermal expansion and contraction
• Operating temperature range: -50 degrees F to 375 degrees F
• Minimum application temperature: -20 degrees F, allowing cold-weather installation
• Adheres to ceramic, glass, metal, painted surfaces, plastic, rubber, and wood
• Paintable formulation compatible with finish coats after curing
• 12 oz cartridge format fits standard caulk guns

Compatibility

Designed for use on doors, gutters, joints, seams, openings, and windows across a wide range of substrate materials including ceramic, glass, metal, painted surfaces, plastic, rubber, and wood.

Installation Notes

A licensed tradesperson or qualified installer should apply this compound using a standard-barrel caulk gun. Clean and dry all surfaces thoroughly before application to ensure proper adhesion. Do not apply to surfaces exposed to continuous water immersion unless the product is rated for that service. Follow applicable building codes for air-sealing and weatherization work, including local energy code requirements for envelope penetrations.