Super Extended And Inward-Leakage Resistant Butyl Hot Melt Sealant

The Super Extended and Inward-Leakage Resistant Butyl Hot Melt Sealant is a specialized, high-performance sealing solution designed for advanced barrier protection against moisture, air, and gas infiltration. Formulated with high-quality butyl rubber and precision-engineered tackifying resins, this thermoplastic sealant offers exceptional elongation, dimensional stability, and inward leakage resistance, making it ideal for the most demanding insulation and sealing applications.

With its super extended sealing capability, the product provides long, continuous bead application across wide surfaces without breakage or thinning. Its enhanced formulation delivers superior inward-leakage resistance, effectively preventing the penetration of air, water vapor, dust, and chemicals—even under thermal stress or external pressure.

It remains permanently tacky and flexible without curing, making it ideal for use in insulated glass units (IGUs), aerospace systems, automotive assemblies, construction panels, and electronic enclosures. The sealant performs reliably over time, maintaining airtight and watertight barriers while resisting deformation or failure, even in extreme environments.

Key Features

Super Extended Bead Capability: Maintains a continuous, stable bead over long distances, ideal for wide panel and large glass applications.

Inward-Leakage Resistant: Acts as a durable barrier against air, moisture, and vapor intrusion.

High Elastic Recovery: Accommodates thermal expansion and mechanical stress without cracking or shrinking.

Non-Curing & Thermoplastic: Stays permanently pliable, allowing for easy adjustment or rework.

Stable Flow Properties: Smooth, clog-free application with consistent viscosity across the full application temperature range.

UV and Weather Resistant: Suitable for long-term outdoor or high-humidity applications.

Low MVTR (Moisture Vapor Transmission Rate): Ensures airtight and watertight performance in critical installations.

Technical Specifications

Base Polymer: Premium butyl rubber

Density: 1.4 – 1.6 g/cm³

Softening Point: 105 – 120°C

Application Temperature: 150 – 190°C

Elongation: >600%

MVTR (ASTM E96): ≤ 0.02 g/m²·24h

Color: Black or gray (custom colors available)

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

Shelf Life: 12 months in sealed original packaging

Applications

Insulated Glass Units (IGUs): Ideal for secondary sealing in double/triple glazing, providing extended edge sealing and preventing gas leakage and moisture ingress.

Automotive Industry: Used in door panels, soundproof layers, and lighting assemblies to prevent air and water penetration.

Construction & Facade Panels: For curtain walls, metal panel joints, and cladding where extended sealing and leakage control are essential.

Aerospace & Rail: High-performance barrier protection for cabin insulation, compartment joints, and equipment housing.

Electronics & Appliances: Seals enclosures to protect internal circuits from humidity and dust without curing shrinkage.

Application Instructions

Preparation: Clean all bonding surfaces thoroughly to remove dust, oil, and water. Surfaces should be dry and free from contaminants.

Heating: Melt the sealant using a hot melt machine, pump, or handheld applicator to 150–190°C.

Application: Apply in a consistent, extended bead along the desired sealing path. The formula supports wide and long joints without splitting or thinning.

Assembly: Join materials while the sealant is hot for best adhesion, ensuring uniform compression.

Storage & Handling

Store in a cool (5–30°C), dry location, away from direct sunlight and heat sources.

Wear heat-resistant gloves and protective gear when handling molten sealant.

Keep packaging sealed when not in use to avoid contamination.

Follow all local disposal regulations for industrial non-hazardous adhesives.

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.

FAQ – Frequently Asked Questions

Q1: What does “super extended” refer to in this product?

A: It refers to the sealant’s ability to maintain a long, continuous bead during application without interruption or thinning, ideal for sealing large surfaces or long joints.

Q2: What is “inward-leakage resistance”?

A: It means the sealant effectively prevents air, moisture, and gas from penetrating into enclosed or insulated spaces, even under pressure or environmental stress.

Q3: Can this product be used outdoors?

A: Yes. It is resistant to UV rays, rain, and temperature extremes, making it suitable for both indoor and outdoor applications.

Q4: Is curing or drying required?

A: No. This is a non-curing sealant. It solidifies upon cooling but remains permanently tacky and reworkable.

Q5: Can it be used in high-humidity environments?

A: Absolutely. Its low vapor transmission rate makes it excellent for moisture-sensitive and high-humidity settings.

Q6: What dispensing equipment is compatible with this sealant?

A: It can be applied with standard hot melt extrusion equipment, including manual and fully automated systems.

Q7: Will it crack or shrink over time?

A: No. It retains its elasticity and sealing performance throughout its life, without shrinking, cracking, or hardening.

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.

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