Description
Sil-Bond RTV-6500 is a professional-grade, one-part high-temperature RTV acetoxy-cure silicone sealant designed for sealing and bonding applications exposed to extreme heat. This construction-grade silicone withstands continuous temperatures up to 500 °F and intermittent spikes to 650 °F, maintaining flexibility and adhesion where other sealants fail.
The 6500 series delivers tenacious adhesion to metal, steel, aluminum, tile, ceramic, glass, painted surfaces, marble, stone, and concrete—creating airtight and watertight joints that endure vibration, thermal cycling, and outdoor exposure. Formulated for all-weather performance and compliance with today’s Green Building Standards, it’s ideal for demanding industrial, HVAC, and high-temperature sealing needs.
Key Features & Benefits
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High-Temperature Performance: Withstands 500 °F continuous, 650 °F intermittent exposure.
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Excellent Adhesion: Bonds securely to metals, ceramics, glass, and most construction materials.
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All-Weather Durability: Remains flexible after prolonged UV and temperature exposure.
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Waterproof & Airtight: Reliable sealing against moisture, air, and contaminants.
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Non-Flammable & VOC Compliant: Safe, low-VOC formula meeting green-building standards.
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Non-Shrinking & Non-Yellowing: Maintains consistent seal appearance and integrity.
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UV Stable & Weather-Resistant: Excellent resistance to cracking, chalking, or fading.
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NSF & FDA Compliant: Approved for incidental food-contact and industrial equipment use.
Common Applications
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HVAC/R systems and ductwork
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Furnaces and fireplaces
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Flues and vent systems
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Roofing and flashing
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Sealing & glazing assemblies
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Plumbing fixtures and bath areas
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Transportation & appliance assembly
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Interior/exterior construction above grade
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Cure System | Acetoxy | — |
| Movement Capability | ± 25 % | ASTM C-719 |
| Modulus | Medium | ASTM D-412 |
| Specific Gravity | 1.04 | — |
| Extrusion Rate | 370 g/min (1/8″ orifice @ 50 psi) | ASTM C-1183 |
| Service Temperature Range | −62 °F to 500 °F | — |
| Intermittent Temperature Range | 650 °F | — |
| Accelerated Weathering (10,000 hrs) | No Change | QUV Weatherometer |
| Skin Over Time | 10 min | MNA Method |
| Tack Over Time | 17 min | ASTM C-679 |
| Cure Rate | 1/8″ per 24 hrs | MNA Method |
| Tensile Strength | 310 psi | ASTM D-412 |
| Elongation | 500 % | ASTM D-412 |
| Durometer Shore A | 26 | ASTM C-661 |
| Dielectric Strength | 20 kV/mm (500 V/mil) | — |
| Dielectric Constant @ 100 Hz | 2.9 @ 60 | — |
| Shelf Life | 24 months | — |
| VOC Content | 30 g/L | — |
Complies with ASTM C-920 Type S, Grade NS, Class 25; TT-S-00230C (COM-NBS); TT-S-01543A (COM-NBS); MIL-A-46106A; FDA CFR 177.2600; USDA Approved; NSF 51; UL Recognized Component.
Colors & Packaging
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Standard Color: Red
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Packaging: 10.3 oz cartridges (24 per case)
Compatible Substrates
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Metal & steel components
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Aluminum panels & frames
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Ceramic & porcelain tile
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Glass & glazing systems
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Stone, marble & concrete
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Painted & coated surfaces
Compliance & Certifications
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ASTM C-920 Type S / Grade NS / Class 25
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MIL-A-46106A qualified
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FDA CFR 177.2600 & NSF 51 approved
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UL Recognized Component
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VOC Compliant (30 g/L)
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Meets Green Building Standards
Ordering Information
Available individually or in case quantities.
For bulk pricing, custom OEM orders, or technical support, contact:
Chemical Concepts | 800-220-1966 | [email protected]
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