Sil-Bond RTV-6500 High-Temp Red Silicone Sealant by Silco, 10oz

Product Name

Sil-Bond RTV-6500 High-Temp Red Silicone Sealant

Brief Description

A one-part, acetoxy-cure red RTV silicone sealant rated for continuous service at 500°F and intermittent spikes to 650°F. Skins over in about 10 minutes, stays non-shrinking and non-yellowing through repeated heat cycling, and carries NSF 51, FDA, MIL-A-46106A, and ASTM C-920 listings.

Popular Applications & Uses

• Exhaust systems, mufflers, and other high-heat automotive joints
• Furnace, boiler, and fireplace seam sealing
• Gasketing on metal enclosures and high-temperature equipment
• Bonding and sealing around stone, marble, and solid-surface countertop edges
• General metal-to-metal, glass, and ceramic sealing where heat is a factor
• Food equipment sealing where an NSF 51 listed material is required

Industries that Commonly Use It

• Automotive Service/Repair: shops use it on exhaust, muffler, and engine-bay sealing jobs
• Construction/ Building Services: crews use it for high-heat seam and gasket sealing on site
• Countertop: stone and solid-surface fabricators use it around sink and seam edges
• Fabrication: metal shops use it for gasketing enclosures and high-temperature assemblies
• Metal Fabrication: welders and fabricators seal joints exposed to repeated heat cycling
• General Manufacturing: production lines use it for sealing heat-generating equipment
• Maintenance & Repair: technicians carry it for field repairs on furnaces, boilers, and exhaust systems
• Energy: plant maintenance uses it on high-temperature process equipment
• Petroleum Industry, Products or Services: refineries and processing facilities use it on high-heat sealing points
• Marine: engine compartments and exhaust runs need a sealant rated for sustained heat
• Transportation/ Specialty Vehicle: fleet maintenance uses it on exhaust and engine-area sealing
• Government & Military: the MIL-A-46106A rating covers military spec applications
• Food & Beverage Company or Distributor: NSF 51 and FDA compliance support food equipment sealing
• Chemical Industry: process plants use it on equipment exposed to heat and chemical splash
• Engineering Services: specified where a documented high-temperature, certified sealant is required
• Industrial Supply: supply houses stock it alongside other high-temperature sealants
• Distributers & Resellers: adhesive and sealant distributors carry it as the high-heat option in their line

Special and Unique Features

• High-Temperature Rated: continuous service to 500°F with intermittent spikes to 650°F
• Wide Service Range: rated down to -62°F, so it also holds up in cold conditions
• One-Part, No Mixing: acetoxy-cure RTV straight from the cartridge
• Certified for Regulated Work: NSF 51, FDA CFR 177.2600, MIL-A-46106A, and ASTM C-920 Type S, Grade NS, Class 25
• Stable Long-Term: non-shrinking, non-yellowing, UV-stable, and VOC-compliant at 30 g/L

Key Properties

• Service temperature: -62°F to 500°F continuous, 650°F intermittent
• Skin-over / tack-free time: 10 min / 17 min
• Cure rate: 1/8" per 24 hours
• Tensile strength / elongation: 310 psi / 500%
• Durometer: Shore A 26
• Shelf life: 24 months, unopened
• Weight: 0.81 lb per 10.3oz cartridge

Surface Compatibility

Bonds to:

• Metal, steel, and aluminum
• Glass and ceramic
• Painted surfaces
• Marble and natural stone
• Concrete

Known backups / known substitutes

• A standard-grade silicone sealant for jobs that stay under 400°F and do not need the NSF 51 or MIL-spec listings

Comparison Note

This is the high-temperature, certified option in the RTV silicone sealant line. Jobs that run below 400°F and don't need NSF 51, FDA, or MIL-spec compliance can use a standard-grade RTV sealant instead.