Electrophoresis Aluminum Single Component Silicone Sealant
Electrophoresis aluminum Single component Silicone sealant is a one component, acetoxy-curing sealant that is used for appliance assembly, conventional glazing, marine applications, and sealing of building components, trailers, trucks, and RVs. It also bonds well with painted metals, glass, plastic, wood, fiberglass, aluminum, and tiles. It is non-sagging, fast curing, elastomeric, 100% RTV, durable, and flexible. It is resistant to temperature, mold, water-based cleaning chemicals, UV radiation, fresh and salt water. 295 mL Cartridge.
Products Description
Electrophoresis aluminum Single component Silicone sealant is a one component, acetoxy-curing sealant that is used for appliance assembly, conventional glazing, marine applications, and sealing of building components, trailers, trucks, and RVs. It also bonds well with painted metals, glass, plastic, wood, fiberglass, aluminum, and tiles. It is non-sagging, fast curing, elastomeric, 100% RTV, durable, and flexible. It is resistant to temperature, mold, water-based cleaning chemicals, UV radiation, fresh and salt water. 295 mL Cartridge.
Key Challenges with Electrophoresed Aluminum
The E-coat itself is the problem:
Non-Stick Nature:
E-coat is designed to be a smooth, continuous, and very durable coating. This same durability and low surface energy make it difficult for sealants to achieve a mechanical "bite."
Formulation-Dependent:
The chemical composition of E-coats varies by manufacturer. Some may have additives or a specific chemistry that silicone simply will not adhere to.
Weak Boundary Layer:
The bond may form to the surface of the E-coat but not to the aluminum underneath. Under stress, the entire sealant bead can peel off in a clean sheet, with the failure occurring between the E-coat and the sealant or, more problematically, between the E-coat and the aluminum substrate.
Best Practices for Success
Given the challenges, you cannot skip any steps.
1. Surface Preparation is EVERYTHING
This is not optional; it is critical.
Step 1: Abrasion (Absolutely Necessary)
You must mechanically abrade the entire area where the sealant will be applied.
Use a relatively coarse grit sandpaper (80-grit to 120-grit) to thoroughly scratch the surface. The goal is to break the smooth, non-porous finish and create a rough profile for mechanical interlock.
Sand until the surface appears uniformly dull.
Step 2: Solvent Cleaning (Crucial)
After sanding, the surface will be contaminated with dust and oils from your hands.
Wipe the abraded area thoroughly with a clean, lint-free cloth and a high-purity solvent like Isopropyl Alcohol (IPA). Use a "wipe on, wipe off" technique with a fresh cloth for the final wipe to ensure all residue is removed.
Do not use general-purpose cleaners or acetone, as they can leave a film.
2. Using a Primer (Highly Recommended)
For a reliable, long-term bond, a primer is often the difference between success and failure.
Purpose: A primer acts as a chemical intermediary, bonding strongly to both the prepared E-coat surface and the silicone sealant.
How to Use
After abrading and cleaning, apply a thin, even coat of the manufacturer-recommended primer.
Allow it to become tack-free or fully dry according to the primer's instructions (this can range from minutes to an hour).
Apply the silicone sealant within the specified application window (often within 1-4 hours). Applying sealant after the primer has fully cured for days may not work.
Choosing the RIGHT Silicone Sealant
Neutral Cure is Mandatory: As with other aluminum types, you must use a neutral cure (alkoxy or oxime) silicone to prevent corrosion of the underlying aluminum if the E-coat is compromised.
High-Adhesion Formulations: Look for products labeled for "Structural Glazing" or "High-Strength Bonding." These contain more powerful adhesion promoters.
Application Scenarios
Packaing
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