Information

West System 404 High-Density Powder is a premium filler designed to be mixed with West System epoxy to create a high-strength adhesive and structural filler. Engineered to provide exceptional compressive strength and durability, 404 High-Density Powder is ideal for bonding, filleting, and hardware bonding applications where maximum strength is essential. This versatile filler enhances the mechanical properties of epoxy, making it a critical component in marine construction and repair projects.

Key Features:

• Enhanced Strength: Increases the compressive strength and durability of epoxy, making it suitable for high-stress bonding and structural filleting.
• Versatile Application: Ideal for bonding hardware, laminating, filleting, and creating strong structural fillets and bonds in marine and structural projects.
• Easy to Mix: Simple to blend with West System epoxy resins, forming a smooth, workable mixture that can be easily applied.
• Improved Adhesion: Provides excellent adhesion to a variety of materials, including wood, fiberglass, metals, and composites.
• Consistent Performance: Delivers reliable, high-quality results in various environmental conditions, ensuring long-lasting performance.

Technical Specifications:

• Appearance: Off-white powder
• Mix Ratio: Add as needed to achieve desired consistency (typically 20% to 40% by weight of the mixed epoxy)
• Application Temperature: Suitable for use in a wide range of temperatures, following the guidelines for the chosen epoxy and hardener
• Cure Time: Varies based on the chosen epoxy resin and hardener combination

Application Instructions:

1. Surface Preparation: Ensure all surfaces to be bonded or filled are clean, dry, and free of contaminants. Sand smooth surfaces to improve mechanical adhesion.
2. Mixing Epoxy: Combine the appropriate amount of West System epoxy resin and hardener according to the product instructions.
3. Adding 404 Powder: Gradually add West System 404 High-Density Powder to the mixed epoxy. Stir continuously until the desired consistency is achieved. For bonding applications, a mayonnaise-like consistency is ideal, while filleting may require a thicker peanut butter-like consistency.
4. Application: Apply the mixture to the prepared surfaces using a spreader, filleting tool, or brush. Work quickly to shape and smooth the mixture before it begins to cure.
5. Clamping and Curing: For bonding applications, clamp the parts together with appropriate pressure. Allow the epoxy to cure according to the hardener’s specifications.

Safety Precautions:

• Always wear protective gloves, eyewear, and a dust mask when handling 404 High-Density Powder and epoxy resins.
• Work in a well-ventilated area to avoid inhaling dust and fumes.
• Avoid contact with skin and eyes. In case of contact, wash thoroughly with soap and water and seek medical attention if necessary.
• Store in a cool, dry place away from direct sunlight and moisture.

Benefits:

• Superior Strength: Enhances the compressive strength and load-bearing capacity of epoxy, ensuring durable and long-lasting bonds.
• Versatile Use: Suitable for a variety of marine and structural applications, from bonding hardware to creating structural fillets.
• Easy Application: Simple to mix and apply, providing consistent and reliable results for both professional and amateur users.
• Tailored Solutions: Allows for customization of epoxy properties to meet specific project requirements, ensuring optimal performance.

West System 404 High-Density Powder is an essential additive for any serious boat builder or repair professional. Its ability to enhance the strength and durability of epoxy makes it a critical component for achieving high-quality, long-lasting results in demanding applications.