MS (Modified Silane) polymer sealants are widely used for their excellent adhesion across a variety of common substrates. This guide outlines the performance on different materials and provides practical tips for surface preparation and application.

1. Common Substrates and Adhesion Performance

Metals

• Excellent adhesion to aluminum, steel, brass, and other standard alloys, often without primers.

• Surface prep tips: For coated or roughened metals, cleaning, degreasing, and light abrasion improve bond reliability.

Glass and Glazing Materials

• Strong adhesion with good durability.

• Tips: Ensure clean, dry surfaces and consider masking for neat joints.

Concrete and Masonry

• Very good bonding to concrete, masonry, and mortar.

• Smooth surfaces may require preconditioning to enhance adhesion.

Stone and Ceramics

• Bonds well to granite, marble, limestone, and ceramic tiles.

• For outdoor applications, choose UV-stable and stain-resistant formulations.

Wood and Timber Products

• Generally bonds well to natural and engineered wood.

• Moisture conditioning and surface cleaning prior to application improve results.

Plastics and Composites

• Good to excellent adhesion on many plastics.

• Low surface energy plastics (e.g., some polyolefins) may need surface treatment or primer.

• For challenging plastics, test adhesion or use manufacturer-recommended primers.

Glass-Fiber Reinforced Plastics (FRP) and Composites

• Reliable bonding achievable with appropriate surface preparation and product selection.

2. Practical Surface Preparation and Application Tips

Surface Preparation

• Surfaces should be clean, dry, and free of dust, oils, or release agents.

• Degreasing followed by light abrasion on smooth substrates generally improves adhesion.

Primers

• Some substrates, especially low-surface-energy plastics or coated surfaces, benefit from primers.

• Always follow the MS polymer product’s primer recommendations.

UV and Weather Exposure

• For exterior joints, select UV-stabilized formulations designed for outdoor use to maintain adhesion and appearance.

Paint Compatibility

• For joints that will be painted, use a paintable MS polymer and test a small area first.

Curing Considerations

• Cure times vary with temperature and humidity.

• Ensure proper joint design and consider environmental conditions during application.

3. Project-Specific Recommendations

For precise guidance on challenging substrates (e.g., treated surfaces, difficult plastics, or exterior applications), provide:

• Substrate type and coating status

• Exposure conditions (indoor vs. outdoor)

• Whether the joint will be painted

This allows for tailored product recommendations and substrate-specific guidance.

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