Product Name
Permabond MS359A Grey MS Polymer Medium Set 10 - 20 min (Thin Viscosity, Self Leveling)
Brief Description
Permabond MS359A Grey is a single-part, moisture-curing MS Polymer adhesive and sealant. It is formulated with a thin, self-leveling viscosity and offers a medium set time of 10 to 20 minutes. This hybrid technology combines the benefits of traditional polyurethane and silicone products, providing excellent adhesion, flexibility, and durability without solvents, isocyanates, or silicones.
Popular Applications & Uses
- Potting and sealing electronic components.- Sealing filters.- Bonding large metal panels, such as transport containers and air conditioning ducts.- Bonding and sealing metal, glass, and plastic panels in curtain wall systems.- Installation and sealing of windows, doors, and other fenestration elements.- Waterproofing and sealing of roofs, balconies, and terraces.- Bonding and sealing of joints in precast concrete panels and structural glazing.- Automotive assembly and repairs, including bonding body panels and windshields.- Ship-deck caulking, ship & boat building.- Structural bonding in vibration constructions.- Connection joints in sheet metal fabrication.- Supple bonding in car bodies, caravans & containers.- Construction & building fabrication.- Glass panel bonding.- Lighting lenses.- Sealing joints in roofs, walls, and floors.- Bonding and sealing car bodies, windshields, and windows.- Bonding and sealing boats and yachts.- Bonding and sealing various materials in manufacturing, including plastics, metals, and glass.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Cladding- Concrete- Construction/ Building Services- Distributers & Resellers- Fabrication- Flooring Installer or Manufacturer- General Manufacturing- Government & Military- Industrial Supply- LED/Electronics- Marine- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle
Special and Unique Features
- Single-part, moisture-curing adhesive.- Self-leveling viscosity (10,000 to 25,000 cP).- Medium set time of 10 - 20 minutes.- Free from solvents, isocyanates, silicones, and PVC compounds.- Non-corrosive.- Cures at room temperature.- Can be painted after curing.- Primer-free adhesion to most surfaces.- Excellent flexibility and elasticity, accommodating movement and vibrations.- Superior adhesive properties across various substrates.- Excellent weather resistance, including UV radiation, temperature variations, and moisture exposure.- Low VOC (Volatile Organic Compound) emissions.- No bubbling during curing.- Non-staining and limits dirt pickup.- Good chemical resistance.- Low odor.- Can withstand higher temperatures for brief periods (e.g., paint baking, wave soldering).
Key Properties
- Chemical composition: MS-Polymer (Modified Silane Polymer).- Appearance: Grey liquid.- Curing system: Moisture cure.- Viscosity: Thin, self-leveling (approx. 17500 mPa s @ 23°C, or 10,000 to 25,000 cP).- Skin formation time: 10 - 20 minutes (medium set).- Time to handling strength: Approximately 1-2 hours.- Full cure: 24 hours.- Temperature resistance (cured): -40°C to 100°C (briefly up to 120°C for some MS polymers).- Density: 1.34 g/cm³ (grey).- Shore A hardness: Typically 20-40 Shore A for MS Polymers, with this product being flexible.- Elongation at break: High, typically 500-800% for MS Polymers.- Tensile strength: 1-3 MPa for MS Polymers.- Tear strength: Approx. 10 N/mm.- Shrinkage: None.- Solvent-free, isocyanate-free, silicone-free, PVC-free.
Surface Compatibility
- Metals (steel, aluminum, zinc, galvanized, acid resistance).- Glass.- Plastics (PVC, polycarbonate, ABS, Nylon, various types except PE, PP, PTFE, low surface energy plastics).- Concrete and mineral substrates (e.g., plasterboard, gypsum).- Wood (all woods, including natural wood with humidity <20%).- Composites.- Epoxy finishes.- Most fabrics.- Varnished and primed surfaces.- EPDM rubber roofing.- Kynar® coated materials.- Not compatible with soft, rubbery, or polyolefins like PP, HDPE, PE, LDPE, UHMW.- Surfaces should be clean, dry, and grease-free. Light abrasion may benefit some metals.
Known backups / known substitutes
- Other MS Polymer adhesives/sealants from Permabond (e.g., MS359 Clear, MS359 Grey, MT3826 - a two-part modified hybrid silane polymer).- Other brands of MS Polymer sealants/adhesives (e.g., SABA Sabatack®, Sababuild®, Weicon Flex 310 M Classic, Everkem EvoSeal MS, AXION FS332BL64).- Polyurethane-based adhesives/sealants (MS Polymers combine benefits of PU and silicone).- Silicone-based adhesives/sealants (MS Polymers combine benefits of PU and silicone).- Epoxy adhesives (for very high-strength bonds, where MS Polymers might not be sufficient).- Methyl Methacrylates (MMAs) (MS Polymers offer better flexibility).- High Bond Structural Tapes (alternative in architectural cladding).- Neutral cure silicones (offer adhesion to a wide range of materials without primer, non-corrosive, low odor, permanent flexibility).
Comparison Note
Permabond MS359A, as an MS Polymer, offers a unique blend of properties that often surpass traditional polyurethane and silicone products. Unlike many polyurethanes, it is solvent-free and isocyanate-free, eliminating bubbling during cure and reducing VOC emissions. Compared to silicones, it is paintable, non-staining, and does not contain silicone oil that can lead to streaking and dirt pickup. It provides excellent flexibility and elasticity, superior to many structural adhesives like epoxies and methyl methacrylates, making it ideal for applications with movement and vibration. Its primer-free adhesion to a wide range of substrates and excellent weather resistance make it a versatile and durable choice for both interior and exterior applications. The self-leveling, thin viscosity, and medium set time of MS359A make it particularly suitable for applications requiring a flowable, even layer that cures at room temperature.
Search Tags
Permabond, MS359A, MS Polymer, Modified Silane Polymer, Adhesive, Sealant, Self-Leveling, Thin Viscosity, Medium Set, Moisture Cure, Grey Adhesive, Flexible Adhesive, Weather Resistant, Solvent-Free, Isocyanate-Free, Silicone-Free, Paintable, Construction Adhesive, Automotive Sealant, Marine Adhesive, Electronic Potting, Metal Bonding, Plastic Bonding, Glass Bonding, Concrete Sealant, General Manufacturing Adhesive, Hybrid Polymer.
