Description
Chem-Set™ MS-35 is a one-part, high-performance hybrid adhesive and sealant engineered for demanding bonding and sealing applications. Formulated with silyl-terminated polyether (STPE) technology, MS-35 combines the strength of polyurethane with the flexibility and weather resistance of silicone, making it one of the most versatile sealants available.
Available in Ultra Clear and White, MS-35 cures by moisture to form a tough, durable, and UV-stable elastomeric bond. It is VOC compliant, non-staining, paintable, and resistant to shrinking, cracking, and yellowing—ideal for both indoor and outdoor use.
Key Features & Benefits
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Superior Adhesion – Bonds securely to PVC, concrete, glass, aluminum, painted surfaces, wood, marble, metals, and more.
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Hybrid Strength – Combines urethane durability with silicone flexibility.
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Weather & UV Resistant – Non-yellowing, non-staining, and stable under long-term UV exposure (ASTM G26).
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VOC Compliant & Eco-Friendly – Contains no solvents or isocyanates; safe for green building standards.
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Paintable & Aesthetic – Can be painted with most industrial and consumer latex paints.
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Durable & Flexible – Withstands joint movement up to ±25% without shrinking or cracking.
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Application Versatility – Can be applied in damp or wet environments without loss of performance.
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Additional Benefits – Vibration damping, low dirt pick-up, and fast curing with same-day paintability.
Common Applications
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Sealing openings & exterior joints
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HVAC, plumbing, roofing, and industrial gaskets
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Kitchen & bath, countertops, and sanitary seals
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Precast concrete and panel mounting
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Marine cabins, transportation seals, appliance trim & parts
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Interior and exterior above-grade construction
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Cure System | Hybrid, Moisture Cure | — |
| Colors | Ultra Clear, White | — |
| Movement Capability | ±25% | ASTM C-719 |
| Skin Over Time | ~20 min | MNA |
| Tack Free Time | ~40 min | ASTM C-679 |
| Cure Rate | 1/8” per 24 hrs | MNA |
| Tensile Strength | 225 psi | ASTM D-412 |
| Elongation | 450–500% | ASTM D-412 |
| Modulus | High | ASTM D-412 |
| Shore A Hardness | 46 | ASTM C-661 |
| Service Temperature | -75°F to 220°F | — |
| Intermittent Temp | Up to 250°F | — |
| Weathering Resistance | UV-A, no change (2,000 hrs) | QUV |
| Specific Gravity | 1.66 | — |
| VOC Content | 18 g/L | — |
| Shelf Life | 12 months | — |
Meets or exceeds: ASTM C920 (Type S, Grade NS, Class 25, Use NT, A, M, G), TT-S-00230C, USDA Approval, AAMA 808.3/805.2/803.3/802.3.
Ordering & Packaging
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Colors: Ultra Clear, White (custom colors available upon request)
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Packaging: Standard cartridges (10.3 fl. oz. / 300 ml)
Why Choose Chem-Set™ MS-35?
Engineered to outperform traditional sealants, MS-35 offers unmatched adhesion, durability, and weather resistance in one simple, one-part formula. Whether sealing countertops, bonding panels, or weatherproofing exterior joints, MS-35 delivers “silicone on steroids” performance in both Ultra Clear and White.
📞 Contact Chemical Concepts at 800-220-1966 for technical guidance, bulk pricing, or to request samples.
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