MS polymer sealants, also known as "Modified Silicone"or "Hybrid"sealants, use a modified silane polymer as their base instead of the synthetic polymer base of silicone or the urethane-based polymer system utilized by polyurethane sealants. This unique chemistry allows MS polymers, like our Lechao MS, to combine the high-performance characteristics of silicone and polyurethane while minimizing the weaknesses of each.
For example, MS polymers possess the durability and paintability of polyurethane without the shrinkage commonly associated with polyurethane chemistries.
It also has silicone's weather and UV resistance while still standing up to abrasion.
Does not contain solvent, silicone or isocyanate, very Low VOC content, No bubble formation, even in wet and humid conditions, Very good UV resistance Over-paintable with water based paints, No shrinkage, Does not cause oil stains in panels and porous material, Non-sag, very easy to apply, No surface tackiness.
Extremely high initial adhesive strength.
● Versatile both indoors and out, super strong, fast and user-friendly.
● Excellent adhesion without primer on practically all surfaces, even moist ones.
● Rapidly strengthens, cures and reaches ultimate strength.
● High ultimate strength and mechanical resistance, for heavy-duty adhesive connections.
● Superb paintability.
● Thixotropic, no sagging, ideal for overhead applications.
● Non-corrosive to metals.
● Compatible in direct contact with the silver coating on mirrors and PVB-laminated glass.
● Odourless, adhesive-free, bubble-free and non-shrink curing hybrid system.
● Good resistance to UV, weather, water, moisture and ageing.
● Free of isocyanate, solvents and silicone.
● No staining or bleeding, no edge contamination.
| Chemical Base | Silane Modified Polymer |
| Curing Mechanism | Moisture Curing |
| Color | White/Black/Grey |
| Density | 1.58+0.1 gr/ml |
| Tack Free Time | 10-15 min (23'℃ and %50 R.H.) |
| Cured depth (24hours) | >3mm (23'Cand %50 R.H.) |
| Tensile Strength | >2.9MPa |
| Elongation at break | ≥250% |
| Shear stress | 2.7MPa |
| 100% Tensile Modulus | ≥ 21.65MPa |
| Shore A Hardness | 65A |
Application Areas:
1. Sealing and Bonding applications in.
2. Window and Door Perimeter.
3. General sealing and waterproofing.
4. Roofing and gutter.
5. Concrete joints.
6. Metal building construction.
7. HVAC
RESTRICTIONS:
● Avoid application below +5 'C and above +35 °C
● Do not apply on curing silicones.
● Minimum depth for working joint is 6 mm.
● Maximum expansion and contraction should not exceed 25% of average joint width
In today's demanding construction, automotive, and industrial markets, KASTAR MS Polymer Sealant stands out as a high-performance, eco-friendly, and versatile adhesive solution. Designed for extreme weather resistance, unmatched flexibility, and long-term durability, our MS Polymer Adhesives delivers exceptional adhesion to diverse substrates—metal, glass, concrete, plastics, and more—without the need for primers.
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