Rust-oleum 9186402 Epoxy Mastic Coating 1 Gal Gloss Gray

Product Description

The RUST-OLEUM 9186402 is a gloss-finish epoxy mastic coating formulated for rust prevention and corrosion protection on metal and concrete surfaces. Sold in a 1-gallon can, it delivers 100 to 225 square feet of coverage per gallon depending on surface porosity and application method. With a VOC content of 340 g/L, this coating is classified as a solvent-borne system and requires a separate activator before use. Licensed painters, industrial maintenance crews, and facilities technicians apply this product where long-term protection against rust and environmental exposure is required on steel or concrete substrates.

The 9186402 is suitable for both indoor and outdoor applications on direct-to-metal and concrete surfaces. Typical use cases include structural steel, equipment housings, tanks, and concrete floors in industrial and commercial settings. Application is appropriate when ambient temperatures fall between 50 degrees F and 120 degrees F. No activator is included in this package; compatible activators include part numbers 07836737, 00243543, 00243568, and 00243527.

Key Features

• Epoxy mastic formula provides direct-to-metal rust preventative protection without a separate primer coat
• Gloss finish in gray suits industrial and commercial maintenance applications
• Coverage of 100 to 225 square feet per gallon depending on surface texture and porosity
• Tack-free in 20 minutes, fully dry in 26 hours, recoat window opens at 72 hours
• Rated for indoor and outdoor use on steel and concrete substrates
• Activator required — sold separately; compatible activator part numbers listed in specifications

Compatibility

Designed for use on steel and concrete surfaces. Requires a separate activator; compatible activators are part numbers 07836737, 00243543, 00243568, and 00243527.

Installation Notes

Surface preparation is critical — remove loose rust, mill scale, oil, and contaminants before application per standard industrial coating practice. Mix the coating thoroughly with the required activator before applying; do not apply unmixed material. Apply only when surface and ambient temperatures are between 50 degrees F and 120 degrees F, and avoid application in high humidity or direct moisture conditions. Follow local and regional VOC regulations, as this product contains 340 g/L VOC and may be restricted in certain air-quality jurisdictions.