Skip to main content
Product

Modified Silane (MS Polymer)

Overview

About Modified Silane (MS Polymer)

Modified silane (MS polymer) adhesives and sealants represent the next generation of high-performance bonding technology — combining the best attributes of silicone flexibility and polyurethane strength in a single, isocyanate-free formulation. These advanced systems offer excellent adhesion to a wide range of substrates without primers, making them a versatile and safer alternative for demanding sealing and bonding applications.

MS polymer technology is based on silyl-terminated polyether chemistry that cures by reacting with atmospheric moisture — producing no hazardous by-products. Unlike polyurethane adhesives, MS polymers are free from isocyanates and MDI, addressing growing workplace health and environmental regulations. Unlike silicones, they can be painted over with standard coating systems. This unique combination of properties positions MS polymer as the adhesive technology of choice for an increasing range of automotive, marine, and construction applications.

Applications & Characteristics

Applications

Where It's Used

  • Automotive bonding and sealing — body seams, hem flanges, spoiler bonding
  • Marine deck bonding and hull sealing
  • Construction joint sealing — expansion joints, window perimeters
  • HVAC duct sealing and insulation bonding
  • General industrial bonding — metal, wood, plastic, and composite assemblies
  • Caravan, motorhome, and recreational vehicle assembly
  • Flooring installation — parquet and resilient flooring adhesive
  • Façade panel bonding in construction
Key Characteristics

Technical Highlights

  • Isocyanate-free — safer to formulate, handle, and apply in the workplace
  • No primer needed on most substrates — bonds directly to metals, glass, plastics, and coated surfaces
  • Paintable with standard water-based and solvent-based coatings
  • Low modulus with high elongation (>300%) — excellent movement accommodation
  • UV stable — no yellowing or degradation from sunlight exposure
  • Excellent initial grab — reduces fixturing and clamping requirements
  • Neutral cure — no corrosive by-products, safe for sensitive metals
  • Non-staining — does not cause silicone staining or contamination on adjacent surfaces
Surface Preparation & Usage

Application Guidelines

01

Surfaces must be clean, dry, and free from contamination. Remove dust, oil, release agents, and old sealant residues.

02

On most clean substrates, MS polymer adhesives bond directly without primer. Conduct adhesion testing on the specific substrate combination if in doubt.

03

Apply using a pneumatic or manual caulking gun. Cut the cartridge or sausage nozzle to the required bead size.

04

Tool the sealant within the tack-free time (typically 10–30 minutes) using a spatula dipped in soapy water for a smooth finish.

05

Full cure is achieved at approximately 3 mm per 24 hours at 23°C/50% RH. Allow adequate cure time before applying paint or exposing to service conditions.

06

Store in cool, dry conditions below 25°C. Shelf life is typically 12–18 months in original unopened packaging.

Packaging

Available Packaging Options

Cartridge: 290 mL, 310 mL
Sausage: 600 mL
Pail: 25 kg
Drum: 200 kg
Related Solutions

Explore More Solutions

MS Polymer vs Silicone — Understanding the Differences

While both MS polymer and silicone sealants offer excellent flexibility and weather resistance, MS polymer provides key advantages: paintability (silicones cannot be painted), no silicone contamination of adjacent surfaces, and compatibility with subsequent coating operations. However, silicone remains superior for continuous high-temperature applications (>120°C). The right choice depends on your specific performance and process requirements.

MS Polymer vs Polyurethane — A Safer Alternative

MS polymer adhesives deliver performance comparable to polyurethane systems for many bonding and sealing applications — without the isocyanate content that creates health and regulatory concerns. As workplace exposure limits for isocyanates tighten globally, MS polymer technology offers a future-proof solution with equivalent or superior performance in non-structural applications.

FAQ

Frequently Asked Questions

What does "isocyanate-free" mean and why is it important?

Isocyanates (including MDI and TDI) are chemicals commonly found in polyurethane adhesives that can cause occupational asthma and skin sensitisation. MS polymer adhesives contain zero isocyanates, eliminating these health risks and simplifying compliance with increasingly stringent workplace exposure regulations worldwide.

Can MS polymer adhesives be painted?

Yes — unlike silicone sealants, cured MS polymer can be painted with both water-based and solvent-based coating systems. This makes them ideal for applications where the adhesive joint is visible and must match the surrounding finish colour.

Do MS polymer adhesives need a primer?

In most cases, no. MS polymer adhesives offer excellent adhesion to metals (aluminium, steel, stainless steel), glass, many plastics, and coated surfaces without the need for primer. However, adhesion testing is recommended for critical applications or unusual substrate combinations.

What is the temperature range for MS polymer sealants?

MS polymer sealants typically perform well from -40°C to +100°C in continuous service, with short-term tolerance up to 120°C. For applications requiring continuous service above 120°C, silicone sealants are recommended.

Explore

Other Products & Services

Hotmelt Adhesives

Hotmelt adhesives are thermoplastic adhesive systems applied in molten state that form strong bonds upon cooling. These solvent-free formulations deli…

Learn more

Silicone Adhesives & Sealants

Silicone adhesives and sealants offer unmatched versatility across the most demanding bonding and sealing applications. Formulated from polydimethylsi…

Learn more

Polyurethane Adhesives & Sealants

Polyurethane (PU) adhesive and sealant systems deliver an exceptional combination of structural strength and elasticity — essential for applications w…

Learn more
View All Products & Services
Partner With Us

Ready to Strengthen Your Bonds?

Contact ParaGlu™ today to discover how our adhesive and sealant expertise can become your competitive advantage. Whether you're an automotive OEM or an industrial manufacturer — we're ready to solve your bonding challenges.

Contact Us Today sales@paraglu.com