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SEIMEDA manufactures one-component, neutral-curing MS Modified Silane Sealant based on silane-terminated polymer (STP) technology. As part of our construction sealants and adhesives range, this MS polymer sealant provides flexible, paintable sealing for window and door joints, precast concrete panels, metal assemblies, and multi-material construction applications.
We supply silane modified polymer sealant to construction material distributors, contractors, and OEM brands. Our MS sealant combines multi-substrate adhesion, weather resistance, and elastic recovery, with bulk supply and packaging customization options for international buyers.
Product Video
Watch our application demonstration video to learn proper installation techniques and real-world performance of the MS Modified Silane Sealant.
Key Features & Typical Properties
Paintable Surface: MS polymer sealant can be painted with compatible coatings, making it suitable for joints that require a finished appearance. Paint compatibility should be tested before application.
Multi-Substrate Adhesion: Suitable for evaluation on concrete, masonry, glass, metal, PVC, wood, and coated surfaces. Primer requirements depend on the actual substrate.
High Elasticity: Elongation at break ≥450%, elastic recovery ≥80%, and movement capability ±20% help the cured sealant accommodate joint movement.
Neutral-Cure Formulation: The one-component hybrid polymer sealant cures with atmospheric moisture and provides a non-corrosive sealing system for compatible building materials.
Exterior Weather Resistance: Developed for building joints exposed to sunlight, moisture, and temperature changes, subject to the selected application requirements.
Application Efficiency: Skin formation time of 20–40 minutes and curing speed ≥3.0 mm/day under the stated reference conditions support construction and assembly scheduling.
Key Properties
Movement Capability: Up to ±20% (meets 20LM classification)
Skin Forming Time: 20–40 minutes (23°C, 50% RH)
Curing Speed: ≥3.0 mm per day
Eco-Friendly: Solvent-free, low odor, free of PVC and isocyanates, very low VOC
Product Advantages
One Sealant for Multiple Substrates
Primer-free on most surfaces, reducing inventory and application complexity
Long-Lasting Performanc
Excellent UV and aging resistance, remains flexible without cracking or yellowing after long-term outdoor exposure
Application-Friendly
Low odor and paintable surface improve job-site conditions; smooth extrusion and excellent sag resistance
Environmentally Safe
Complies with strict environmental regulations, suitable for schools, hospitals, and public buildings
MS Polymer Sealant Applications
Main Functions
SEIMEDA MS polymer construction sealant is primarily intended for elastic, non-structural joints where paintability, adhesion to different materials, and movement accommodation are required.
Typical Applications
Window & Door Installation: Frame-to-wall perimeter joints, aluminum and PVC frame connections
Precast Concrete Buildings: Precast panel joints, concrete wall connections
Aluminum Panel Façades: Non-structural metal panel joints and façade connections
Interior Construction:Wall panel joints, skirting board connections, decorative finishing joints
Metal Assembly: Sheet-metal joints, equipment housings and compatible metal connections
Substrates & Limitations
Suitable Substrates: Concrete, masonry, glass, anodized aluminum, steel, PVC, wood, and most painted surfaces
Application Conditions: Recommended substrate temperature 5°C–35°C; surfaces must be dry, clean, and frost-free
Limitations:
Not suitable for permanent water immersion, food-contact surfaces, or direct contact with asphalt and oily materials
Composition
Based on MS Polymer (silane-modified polyether) resin, formulated with fillers, plasticizers, and special weather-resistant additives. Neutral curing system ensures no corrosion to metals or coated glass.
Technical Specifications / Performance Data
The following data is tested under standard laboratory conditions and is provided as a clear performance reference for buyers.
|
Performance Item |
Test Result |
Description |
|
Extrudability |
≥ 100 mL/min |
Smooth and easy application |
|
Skin Forming Time |
30 minutes |
High application efficiency |
|
Hardness |
40 Shore A |
Balanced flexibility |
|
Tensile Strength |
≥ 1.8 MPa |
Strong and reliable adhesion |
|
Elongation at Break |
≥ 450% |
High elasticity |
|
Elastic Recovery |
≥ 80% |
Excellent resilience |
|
Volatile Organic Content (VOC) |
3% |
Environmentally friendly, low VOC |
|
Movement Capability |
±20% |
Accommodates wide joint movement |
FAQ
MS sealants combine silicone-like weather resistance with PU-like paintability and broad adhesion, without corrosion—making them ideal for windows and curtain walls.
What is the difference between MS, silicone, and PU sealants?
MS sealants combine silicone-like weather resistance with PU-like paintability and broad adhesion, without corrosion—making them ideal for windows and curtain walls.
Can it be used for outdoor windows? How long is the service life?
Yes. It is a core application, with an expected service life of over 20 years under normal conditions.
MS polymer, silicone, and polyurethane sealants have different performance characteristics. The appropriate material depends on substrate compatibility, paintability, joint movement, and operating conditions.
| Selection Factor | MS Polymer Sealant | Neutral Silicone Sealant | PU Sealant |
|---|---|---|---|
| Paintability | Generally paintable with compatible coatings | Standard grades are generally difficult to paint | Depends on formulation |
| Multi-Substrate Adhesion | Suitable for various approved construction substrates | Good adhesion to compatible glass, metals, and building materials | Suitable for selected construction and industrial substrates |
| Weather Resistance | Suitable for exterior applications with appropriate product selection | Generally strong UV and weather resistance | Formulation-dependent |
| Joint Flexibility | Flexible elastic sealing | Flexible sealing with grade-dependent movement ratings | Grade-dependent elasticity and movement |
| Typical Applications | Paintable building joints, mixed-material sealing, panel joints | Glazing, windows, doors, general construction joints | Construction joints, metal assembly, industrial sealing |
For conventional glass and window joints, SEIMEDA supplies NP Neutral Silicone Sealant. For polyurethane-based industrial and construction applications, see our PU Polyurethane Sealant.
Paintability is an important advantage of MS polymer sealant for construction joints requiring a uniform painted finish. However, coating performance depends on the paint formulation, curing conditions, and expected joint movement.
| Paintability Factor | Selection Guidance |
|---|---|
| Paint Type | Verify compatibility with the intended water-based or solvent-based coating |
| Painting Time | Follow the approved product and paint instructions; confirm whether sufficient curing is required |
| Paint Adhesion | Test adhesion to the cured sealant surface |
| Joint Movement | Ensure the coating has sufficient flexibility for the expected movement |
| Surface Appearance | Check for cracking, discoloration, poor adhesion, or uneven finishing |
For exterior painted joints, the flexibility of the coating is as important as the paintability of the MS modified silane sealant. Rigid paint films may crack when the underlying joint moves.
SEIMEDA supplies MS polymer sealant for building material wholesalers, distributors, construction contractors, and private-label brands. Packaging and customization requirements can be discussed according to the target market and order volume.
| Purchasing Item | Supply Information |
|---|---|
| Product Grade | Standard MS modified silane sealant; alternative requirements subject to evaluation |
| Available Colors | Confirm standard and custom color options before ordering |
| Packaging Format | Cartridge, sausage, and bulk packaging requirements can be reviewed; actual available capacities require confirmation |
| OEM / Private Label | Custom labels, branding, and packaging artwork subject to order requirements |
| Formulation Customization | Curing speed, hardness, flexibility, and other requested properties subject to technical evaluation |
| MOQ | Confirm according to selected packaging, color, and customization |
| Samples | Request samples for substrate and paint compatibility testing |
| Lead Time | Confirm based on product specifications, quantity, and production schedule |
For private-label MS polymer sealant orders, provide your target market, required performance, packaging specifications, brand artwork, and estimated purchasing quantity.
SEIMEDA also supports international buyers developing their own construction sealant product ranges. See our OEM Sealant Manufacturing Services.
Application Requirements
Surface Preparation: Ensure substrates are clean, dry, stable, and free from oil, dust, or loose particles.
Joint Design: Select joint width, depth, and backing materials according to the expected movement and project requirements.
Application Conditions: Recommended substrate temperature is 5°C–35°C. Avoid application on wet or frozen surfaces.
Sealant Curing: Allow sufficient moisture-curing time before exposing joints to service conditions or additional finishing operations.
Painting: Confirm coating compatibility and the appropriate painting time before site application.
Application Limitations
Not suitable for permanent water immersion.
Not recommended for direct contact with asphalt, oils, or materials that may cause plasticizer migration without compatibility testing.
Not intended for food-contact applications without appropriate product approval.
Difficult-to-bond plastics and specialized coatings may require additional surface treatment.
Do not use as a substitute for load-bearing structural glazing silicone without specific testing and approval.
For load-bearing glass curtain wall bonding, refer to SEIMEDA Structural Silicone Sealant.
Yes. SEIMEDA MS polymer sealant is designed to be paintable with compatible coatings. Test the intended paint system and follow the recommended curing and painting conditions before application.
It can be considered for precast concrete panel joints requiring elastic sealing. Confirm the expected joint movement, concrete surface condition, adhesion performance, and project standards before selecting the product.
Primer requirements depend on the substrate and its surface treatment. Adhesion testing should be performed on the actual materials to determine whether a primer is necessary.
MS polymer sealant can be an alternative for certain non-structural joints where paintability and multi-substrate adhesion are important. It should not be treated as a universal replacement for structural silicone, specialist PU adhesives, or other application-specific sealants.
SEIMEDA supports OEM and private-label sealant supply. Buyers can discuss packaging, labeling, colors, and formulation requirements according to their market and order quantity.
Buyers can request the applicable product TDS, SDS, and available performance reports. Specify the required test standard or market regulation so SEIMEDA can confirm which documents are available for the selected grade.
SEIMEDA manufactures MS modified silane sealant for construction joint sealing, window and door installation, precast concrete applications, and international B2B supply. We support distributors, contractors, and private-label brands with product selection, sample requests, and customized purchasing arrangements.
Send us your application, substrate materials, required specifications, paintability requirements, packaging preferences, and estimated order quantity. Our team can review the available MS polymer sealant options and provide technical information and a quotation.
Contact SEIMEDA for MS Polymer Sealant Pricing, Samples & OEM Supply
Payment Methods
We offer flexible and secure payment methods: T/T, Alibaba Trade Assurance (Alibaba.com Pay), and company bank transfer.
Certifications & Project References
ISO 9001, CE, RoHS certified. Product quality insured by PICC
ISO9001
CE
RoHS
PICC
Why Choose Us
We are not just a manufacturer, but your long-term construction sealing solution partner, providing one-stop service from product performance to export logistics.
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