Butyl Hot Melt Sealant For Aluminum Alloy

Product Description

The Butyl Hot Melt Sealant for Aluminum Alloy is a high-performance, single-component thermoplastic adhesive engineered specifically for bonding and sealing applications involving aluminum and aluminum alloy surfaces. Formulated with premium butyl rubber and advanced adhesion promoters, this sealant ensures strong, flexible, and long-lasting bonds with excellent compatibility for non-ferrous metals.

Designed for demanding applications in construction, electronics, transportation, and appliance manufacturing, this sealant offers strong initial tack, excellent thermal and weather resistance, and non-corrosive bonding to aluminum substrates. Its non-curing nature ensures that it remains pliable and tacky throughout its service life, accommodating thermal expansion and contraction without cracking, drying, or shrinking.

This butyl hot melt sealant is suitable for both indoor and outdoor use, offering a reliable vapor, air, and moisture barrier when used for panel sealing, window systems, electrical housings, and HVAC components. The product’s smooth flow characteristics and stable viscosity enable easy processing with both manual and automated equipment.

Key Features

Excellent Adhesion to Aluminum Alloy: Specially formulated to bond securely with aluminum and coated aluminum surfaces.

Non-Corrosive: Chemically neutral formulation prevents galvanic corrosion or surface degradation of aluminum parts.

Thermal Flexibility: Maintains performance under wide temperature ranges without becoming brittle or soft.

Permanent Tackiness: Non-curing composition allows long-term flexibility and reworkability.

Weather & UV Resistant: Withstands prolonged exposure to sunlight, moisture, and pollutants.

Clean Application: Smooth, clog-free flow for precise, continuous sealing lines during high-speed production.

Environmentally Friendly: Solvent-free and low in volatile organic compounds (VOCs), safe for enclosed environments.

Technical Specifications

Base Polymer: Synthetic butyl rubber

Density: 1.4 – 1.6 g/cm³

Softening Point: 100 – 120°C

Application Temperature: 150 – 190°C

Color Options: Black, gray, custom on request

Packaging: 5kg / 10kg / 25kg blocks, 200kg steel drums

Shelf Life: 12 months in unopened original packaging

Adhesion Strength (Aluminum): ≥ 1.5 MPa

Applications

Aluminum Curtain Walls and Panels: Provides air- and water-tight sealing for aluminum framing systems and exterior panels.

HVAC Components: Seals joints in ductwork, vents, and insulation with aluminum casings.

Appliance Manufacturing: Used in aluminum-bodied appliances for vibration damping and enclosure sealing.

LED Lighting and Electronics: Protects aluminum enclosures from water, dust, and heat ingress.

Automotive and Transportation: Applied in aluminum body panels and structural components for vibration isolation and sealing.

Application Instructions

Surface Preparation: Ensure aluminum alloy surfaces are clean, dry, and free from oil, oxide, or contaminants.

Heating: Heat sealant to 150–190°C using a hot melt applicator, tank system, or extruder.

Dispensing: Apply a continuous, even bead along the desired joint or edge.

Assembly: Join components while the sealant is hot to ensure optimal wetting and bonding.

Storage & Handling

Store in a cool, dry place (5–30°C) out of direct sunlight.

Reseal packaging when not in use to prevent contamination.

Use protective gloves and eyewear when handling molten material.

Dispose of product waste in compliance with local environmental regulations.

Deliver,Shipping And Serving

1. Online testing

Online testing will be carried out before the finished product is packaged, and the finished product will be packaged only after it meets the relevant requirements.

2. Quality control supervision.

Quality control will be carried out again before the finished product packaging is put into storage and enters the market.

3. Application testing

Carry out full product testing, from the user's perspective, restore the product application scenario, and test its application.

4. Technical service

Application technical service provides high-quality technical services. After the product enters the market, after-sales technical service will continue to track the product usage and provide high-quality after-sales service.

Butyl Hot Melt Sealant For Aluminum Alloy

FAQ – Frequently Asked Questions

Q1: Is this sealant safe to use on raw or anodized aluminum?

A: Yes. The formula is non-corrosive and works effectively on raw, anodized, and coated aluminum surfaces without promoting oxidation or surface damage.

Q2: Does it require a primer for aluminum adhesion?

A: Generally, no primer is needed. However, for polished or treated aluminum, a surface test is recommended for best results.

Q3: Can it be used outdoors on aluminum joints?

A: Yes. It is weather-resistant and UV-stable, making it suitable for long-term outdoor use.

Q4: Will it become brittle or shrink over time?

A: No. This is a non-curing thermoplastic that remains flexible and tacky, resisting aging, cracking, and shrinkage.

Q5: Is this sealant conductive or will it interfere with electronic components in aluminum housings?

A: No. It is non-conductive and safe for use around sensitive electronics and electrical housings.

Q6: Can the sealant be reheated and reused?

A: Yes. If uncontaminated, the sealant can be reheated and reused multiple times without losing its properties.

Q7: Is this product compatible with automated extrusion equipment?

A: Absolutely. Its stable viscosity and smooth flow make it ideal for high-speed, automated production lines.

Company Profile

Chengxin (Henan) Sealing New Material Tech Co., Ltd. is a Chinese manufacturer and supplier of insulating glass sealing materials. We have been professionally focusing on the sealing material industry for many years. With excellent product quality and a complete market service guarantee system, the company has formed a wide sales network in China. In the international market, "Chengxin" brand series products have been exported to Western Europe, America, the Middle East, Africa, Southeast Asia and other countries and regions. We look forward to becoming your long-term partner.