Description
Sil-Flex RTV-7500 is a one-part, neutral cure, low-modulus silicone adhesive and sealant designed for high-performance sealing and bonding across a wide range of substrates. Engineered for both industrial and construction applications, it cures to form a flexible, rubber-like seal with excellent adhesion, even on challenging surfaces like concrete, PVC, painted metals, and stone.
Its non-bleeding formula makes it a preferred choice for quartzite, marble, and porcelain installations—especially for fabricators concerned with silicone staining. Whether you’re sealing expansion joints or installing countertops, RTV-7500 delivers long-lasting durability, UV resistance, and weatherproof performance in demanding environments.
Key Features & Benefits
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Neutral Cure – Safe on sensitive stones like quartzite and marble; prevents staining or bleed-through
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Multi-Surface Compatibility – Bonds to PVC, wood, aluminum, concrete, glass, painted surfaces, brick, stone, and more
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Excellent Adhesion & Flexibility – ±50% movement capability (ASTM C-719)
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Low Odor & Non-Corrosive – Ideal for indoor use and occupied spaces
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UV Resistant & Waterproof – Suitable for exterior weather-exposed joints
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VOC Compliant – 40 g/L formula meets green building requirements
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Non-Flammable & Long Service Life
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Non-Bleeding – Ideal for natural stone, as highlighted in our Quartzite Solutions Guide
Common Applications
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Countertop installations (stone, quartz, marble, porcelain)
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HVAC/R and plumbing penetrations
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Roofing and siding joints
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Precast and architectural concrete
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Appliance trim, industrial gaskets, and marine seals
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Kitchen, bath, furnace, and fireplace joints
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Interior and exterior caulking, above-grade
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Cure System | Neutral / Oxime | — |
| Movement Capability | ±50% | ASTM C-719 |
| Modulus | Low | ASTM D-412 |
| Cured Texture | Rubber | — |
| Specific Gravity | 1.04 | — |
| Extrusion Rate | 500 g/min @ 50 psi | ASTM C-1183 |
| Temperature Range | -62°F to 400°F | — |
| Intermittent Temp. Max | 450°F | — |
| UV Weathering (10,000 hrs) | No Change | QUV Weatherometer |
| Skin Over Time | 12 minutes | MNA Method |
| Tack-Free Time | 25 minutes | ASTM C-679 |
| Cure Rate | 1/8” per 30 hours | MNA Method |
| Tensile Strength | 190 psi | ASTM D-412 |
| Elongation at Break | 650% | ASTM D-412 |
| Shore A Hardness | 15 | ASTM C-661 |
| Dielectric Strength | 20 kV/mm (500 V/mil) | — |
| Dielectric Constant | 2.7 @ 100 Hz | — |
| VOC Content | 40 g/L | — |
| Shelf Life | 18 months | — |
Compliance & Certifications
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ASTM C920 Type S, Grade NS, Class 50
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TT-S-00230C, TT-S-01543A
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MIL-A-46106A
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AAMA 808.3, 805.2, 803.3 (Type I), 802.3 (Type II)
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UL Recognized Component
Compatible Substrates
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PVC, concrete, glass, aluminum
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Painted metals, wood, fiber cement
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Brick, stone, ceramic, porcelain, stucco
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Building paper, window wrap, steel, masonry
Packaging & Ordering Information
Standard Colors:
Clear, White, Black, Aluminum, Almond, Bronze, Gray, Trans White
(Custom colors available upon request)
Packaging:
10.3 fl oz (305 mL) cartridges. Cases available for volume orders.
📞 Get Expert Help or Order Now
For pricing, bulk orders, or custom color requests, contact us at:
📧 [email protected]
📞 800-220-1966
Looking for other neutral cure options for quartzite or marble? Check out our Quartzite Solutions Guide or browse our full line of Neutral Cure Silicones.
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