Shin‑Etsu KBM‑503 Silane Coupling Agent 1 kg Methacryloxy Functional Silane for Resin–Inorganic Adhesion

About Shin-Etsu KBM-503 Silane Coupling Agent

OVERVIEW:

Shin-Etsu KBM-503 is an organofunctional silane coupling agent designed to improve adhesion between organic polymers and inorganic materials. It features a methacryloxy functional group, which allows chemical bonding with unsaturated polyester, acrylic, and other resin systems, while the silane component forms strong, durable bonds with inorganic surfaces such as glass, metal, ceramics, and mineral fillers. KBM-503 is widely used to enhance mechanical properties, moisture resistance, and durability in adhesives, coatings, composites, and sealants.

KEY FEATURES:

Adhesion Promotion
Enhances bonding strength between organic resins and inorganic surfaces, supporting improved structural performance and longevity.

Methacryloxy Functional Group
Compatible with various polymer systems, including unsaturated polyesters, acrylics, and other free-radical-curing resins.

Moisture Resistance
Forms hydrolysis-resistant siloxane bonds with inorganic substrates, contributing to improved water and weather resistance.

Versatile Usage
Can be used as a surface treatment agent, primer, or formulation additive in a wide range of industries.

Improved Mechanical Properties
Supports increased tensile strength, impact resistance, and fatigue performance in composite materials.

APPLICATIONS:

• Composite Materials – Enhances bonding between resins and glass fibers or mineral fillers, improving mechanical strength and durability.

• Coatings and Paints – Used to improve adhesion to glass, metals, and ceramics, supporting better durability and weathering performance.

• Adhesives and Sealants – Promotes stronger adhesion to inorganic substrates in structural and flexible adhesives and sealants.

• Glass Fiber Treatment – Applied as a coupling agent for glass fibers used in reinforced plastics and composites.

• Construction Materials – Improves bonding performance and moisture resistance in building products and architectural coatings.

PACKAGING:

Shin-Etsu KBM-503 is typically available in sealed containers such as 1kg bottles, 15kg pails, or 200kg drums, depending on regional availability and distributor offerings.

INSTRUCTIONS FOR USE:

• Surface Preparation: Clean substrate surfaces to remove dust, oils, and oxides for optimal bonding.

• Application: Apply KBM-503 as a primer, surface treatment, or formulation additive. When used as a treatment agent, dilution with suitable solvents may be necessary.

• Curing: Allow treated surfaces to hydrolyze and condense properly before subsequent processing or coating steps.

SAFETY AND HANDLING:

Shin-Etsu KBM-503 should be used in a well-ventilated area. Avoid contact with eyes and skin. Use protective gloves and eyewear when handling. For detailed safety, handling, and disposal guidelines, refer to the product’s Safety Data Sheet (SDS).

DISCLAIMER:

The information provided is intended for general reference only. Actual product performance depends on materials used, application methods, and processing conditions. Users should consult the official technical datasheet and SDS to verify suitability for their specific application.