Chem-Set MS-35 Hybrid Adhesive Sealant


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Chem-Set MS-35: One-Part, High-Performance Hybrid Sealant and Adhesive

Chem-Set MS-35 is a one-component, high-modulus, mildew-resistant, multipurpose silyl-terminated polyether (hybrid) elastomeric sealant and adhesive. When fully cured, this unique VOC compliant formula offers UV stability and firm bonding to a wide variety of substrates, including PVC, concrete, glass, aluminum, painted surfaces, wood, plywood, marble, metal, and more. We often refer to the MS-35 as “silicone on steroids”.

Here’s what makes MS-35 the ideal choice for your sealing and bonding needs:

  • Combines the best qualities of urethane and silicone sealants: MS-35 offers the high strength and durability of polyurethane with the elasticity and weather resistance of silicone.
  • High early green strength/same day painting: MS-35 cures quickly, allowing you to paint the sealed surface on the same day, saving you time and labor.
  • Bonds to most substrates without priming: MS-35 adheres to a wide range of substrates without the need for primers, simplifying your application process.
  • Wide range of applications: MS-35 is suitable for various applications, including panel mounting, sealing precast concrete, industrial gaskets, transportation seals, marine cabins, appliance trim & parts, interiors/exteriors, above-grade applications, sealing openings & exterior surfaces, HVAC/R, plumbing, roofing, kitchens & baths, countertops, and sanitary seals.
  • Easy to use: MS-35 is a one-part sealant, eliminating the need for mixing and reducing the risk of application errors.
  • Durable and long-lasting: MS-35 is 100% solids, contains no solvents or isocyanates, and offers excellent resistance to UV degradation, weathering, and water washout, ensuring a long-lasting and reliable seal.
  • Low odor and eco-friendly: MS-35 is VOC compliant and low in odor, making it a safe and environmentally friendly choice for indoor and outdoor applications.

In addition to the features mentioned above, MS-35 also offers the following benefits:

  • Vibration damping
  • Improved aesthetics
  • Low dirt pick-up
  • Speed and ease of application
  • Paintable with most consumer and industrial latex paints
  • Can be applied in damp and wet environments

By combining the strengths of polyurethane and silicone sealants, MS-35 offers a versatile and high-performing solution for a wide range of sealing and bonding applications.


Physical Properties Test Method
Cure System Hybrid, Moisture Cure  
Color Ultra Clear and White  
Skin Over Time (min) 20* MNA Method
Tack Over Time (min) 40° ASTM C-679
Cure Rate 1/8″ per 24hrs” MNA Method
Tensile Strength (psi) 225 ASTM D-412
Elongation % 450-500 ASTM D-412
Modulus High ASTM D-412
Physical Properties (Cured) Rubber  
Specific Gravity 1.66  
Extrusion Rate, g/min 320 ASTM C-1183
1/8″ orifice @ 50 psi Modified  
Temperature Range -75°F to 220°F  
Intermittent Temperature Range 250 F  
Accelerated Weathering (2,000 hrs.) UV-A, No Change QUV Weatherometer
Durometer Shore A 46 ASTM C-661
Shelf Life (months) 12  
Volatile Organic Content 18 gr./liter  

*All propeties derived from lab conditions (77°F at 50% relative humidity)

Additional information

Weight .8125 lbs
Dimensions 2 × 2 × 9 in

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