Description
Sil-Flex RTV-7500 is a professional-grade, neutral cure silicone sealant and adhesive designed for large-scale industrial and construction use. Packaged in a 5-gallon pail, this formulation offers the same proven performance as the cartridge version—providing long-lasting, flexible, and non-staining seals on virtually any substrate.
The low-modulus, oxime-cure system ensures exceptional flexibility and adhesion, even on sensitive materials such as quartzite, marble, and porcelain. Unlike acetoxy silicones, RTV-7500 produces no acid by-products, making it safe for natural stone and metal applications where corrosion or staining must be avoided.
Engineered for superior UV resistance, ±50% movement capability, and durable waterproof performance, RTV-7500 is ideal for production environments, precast operations, and field installations requiring bulk silicone dispensing.
Key Features & Benefits
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Neutral Cure Formula: Safe for marble, quartzite, and other natural stones—prevents staining or bleed-through.
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High Flexibility: ±50% movement capability for dynamic joints and expansion areas.
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Excellent Multi-Surface Adhesion: Bonds to PVC, concrete, metal, glass, wood, and painted substrates.
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Low Odor & Non-Corrosive: Ideal for interior applications and enclosed workspaces.
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UV Stable & Weatherproof: Long-term performance under extreme sunlight and temperature cycles.
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VOC Compliant (40 g/L): Meets current green building standards.
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Non-Flammable & Long Service Life: Maintains durable elasticity without shrinkage.
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Non-Bleeding: Specially formulated for use with natural and engineered stone surfaces.
Common Applications
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Countertop and surface fabrication (stone, quartz, porcelain)
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Precast and architectural concrete joints
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HVAC/R and plumbing penetrations
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Roofing and siding panels
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Industrial gasket sealing and appliance assembly
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Window and door perimeter sealing
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Marine and transportation equipment
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Interior/exterior expansion joints, 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 |
| Service Temperature Range | −62°F to 400°F | — |
| Intermittent Temperature | 450°F | — |
| UV Weathering (10,000 hrs) | No Change | QUV Weatherometer |
| Skin Over Time | 12 min | MNA Method |
| Tack-Free Time | 25 min | ASTM C-679 |
| Cure Rate | 1/8″ per 30 hrs | MNA Method |
| Tensile Strength | 190 psi | ASTM D-412 |
| Elongation | 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 | — |
Complies with ASTM C920 Type S, Grade NS, Class 50; TT-S-00230C; TT-S-01543A; MIL-A-46106A; AAMA 808.3, 805.2, 803.3 (Type I), 802.3 (Type II); UL Recognized Component.
Colors & Packaging
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Standard Colors: Clear, White, Black, Aluminum, Almond, Bronze, Gray, Trans White
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Packaging: 5-Gallon Pail (18.9 L) — ideal for bulk or OEM dispensing
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Custom Colors: Available upon request
Compatible Substrates
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PVC and composite materials
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Glass, aluminum, and steel
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Painted metals and wood
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Concrete, masonry, and brick
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Stone, ceramic, and porcelain
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Stucco and fiber cement
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
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VOC Compliant (40 g/L)
Ordering Information
Available in bulk 5-gallon pails for production and OEM applications.
For pricing, volume orders, or technical support, contact:
Chemical Concepts
📧 [email protected]
📞 800-220-1966
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