MS Modified Silane Sealant

MS Modified Silane Sealant is a one-component, neutral-curing elastic sealant based on advanced STP (Silane-Terminated Polymer) technology.

It uniquely combines the excellent weather resistance of silicone sealants with the high strength and paintability of polyurethane sealants, offering a non-corrosive, environmentally friendly, and all-round sealing solution for windows, curtain walls, and industrial assembly.

Featuring low modulus, high elasticity, outstanding UV and aging resistance, and excellent adhesion to concrete, glass, metals, plastics, and more, this MS polymer sealant is an ideal upgraded alternative to traditional PU sealants and certain silicone sealants.

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Videos Product Description Technical Specifications & FAQ

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

Key Features

Low modulus, high elasticity (elastic recovery ≥80%)

Paintable, weather-resistant, anti-aging

Neutral curing, non-corrosive to substrates
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

Main Functions & Applications

Main Functions

Provides long-term elastic sealing for construction joints, offering waterproofing, dust resistance, sound insulation, vibration absorption, and accommodation of structural movement.
Typical Applications

Windows & Doors Installation: Waterproof sealing between frames and walls

Curtain Wall Systems: Unitized curtain walls, stone and aluminum panel joints

Prefabricated Buildings: Waterproof sealing of precast concrete (PC) joints

Industrial & Maintenance Use: Vehicle bodies, ship decks, containers, and general equipment sealing
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.

Q

What is the difference between MS, silicone, and PU sealants?

A

MS sealants combine silicone-like weather resistance with PU-like paintability and broad adhesion, without corrosion—making them ideal for windows and curtain walls.
Q

Can it be used for outdoor windows? How long is the service life?

A

Yes. It is a core application, with an expected service life of over 20 years under normal conditions.

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