What’s the Difference Between Silicone Sealant and MS Adhesive for ACP?

Aluminum Composite Panel (ACP) is widely used in modern architecture for façades, cladding, signage, and interior decoration. To ensure long-term durability and a flawless appearance, choosing the right bonding and sealing material is essential. Two of the most common options in the ACP industry are silicone sealant and MS (Modified Silane) adhesive. Although they may look similar on the surface, their properties, performance, and recommended applications are very different.

In this article, we’ll walk you through the key differences and help you decide which solution is best for your ACP projects.

1. What Is Silicone Sealant?

Silicone sealant is a moisture-curing, elastomeric material primarily used for sealing joints. It is known for excellent UV resistance, weatherability, and flexibility, making it popular for exterior applications.

Key characteristics

▪ Strong weather and UV resistance

▪ Excellent flexibility even under temperature changes

▪ Suitable for sealing joints, gaps, and perimeter edges

▪ Available in acetic or neutral cure types

▪ Limited bonding strength on some materials

Common ACP uses

▪ Perimeter sealing Joint sealing between ACP panels

▪ Curtain wall weatherproof sealing

▪ Non-load-bearing applications

2. What Is MS Adhesive?

MS adhesive (Modified Silane Polymer) is a high-performance hybrid sealant/adhesive that combines the bonding strength of polyurethane with the durability of silicone.

Key characteristics

▪ High bonding strength for structural and semi-structural applications

▪ Excellent adhesion to metal, aluminum, ACP, glass, stone, concrete, and plastics

▪ Paintable after curing (unlike most silicones)

▪ Solvent-free, isocyanate-free, low-VOC, and environmentally friendly

▪ Strong initial tack and fast curing

Common ACP uses

Bonding ACP panels to frames or substrates

Interior and exterior installation

Fixing decorative aluminum panels

Structural bonding where mechanical fixings are not preferred

3. Key Differences Between Silicone Sealant and MS Adhesive for ACP

4. Which One Should You Choose for ACP?

Choose Silicone Sealant if:

✔ You need weatherproof sealing around ACP panels

✔ The application is non-load bearing

✔ Flexibility and UV resistance are the top priorities.

Choose MS Adhesive if:

✔ You need strong bonding for installing or fixing ACP panels

✔ You want an all-in-one adhesive and sealant

✔ You need excellent adhesion on aluminum, metal, or composite surfaces

✔ You prefer environmentally friendly, low-odor products

✔ You want a paintable surface after curing

In most ACP installation cases, MS adhesive is the preferred choice due to its superior bonding strength, versatility, and environmental safety. Silicone sealant, however, remains the best option for edge and joint sealing.

5. Why Choose KINGDELI Silicone Sealant & MS Adhesive?

KINGDELI offers a full range of silicone sealants and MS polymer adhesives designed for professional construction and ACP applications.

Our products provide:

✔ Strong adhesion to aluminum and composite materials

✔ Excellent weather and UV resistance

✔ High initial tack for reliable installation

✔ Low-VOC, environmentally friendly formulations

✔ Custom colors, packaging, and specifications

Our R&D team ensures every product meets international standards for durability, safety, and performance—making KINGDELI a trusted partner for ACP installers, contractors, and distributors worldwide.

Conclusion

Both silicone sealant and MS adhesive have their own advantages in ACP applications. Silicone is ideal for sealing, while MS adhesive excels in bonding and structural fixing. Knowing the difference helps you choose the right product for your project and ensures long-lasting results.

If you’re unsure which material suits your application, KINGDELI’s technical team is here to help.

Contact us today for product recommendations or request free samples!