Butyl Hot-Melt Sealant For Insulating Glass With Permanent Plasticity Suppliers, Manufacturers

Product Description

The Butyl Hot-Melt Sealant for Insulating Glass with Permanent Plasticity is a high-performance, non-curing sealant specially developed for primary sealing in double-glazed and triple-glazed insulating glass units (IGUs). Formulated with refined butyl rubber and advanced tackifiers, this sealant provides permanent plasticity, ensuring long-term airtight and watertight performance without hardening, shrinking, or cracking over time.

This sealant is designed for hot melt application, forming a strong, uniform bond with aluminum spacers and glass surfaces. It effectively prevents moisture ingress and gas leakage, making it an essential component for energy-efficient and long-lasting IGU systems. Its excellent adhesion, low moisture vapor transmission rate (MVTR), and non-fogging characteristics make it a top choice for architectural glass manufacturers worldwide.

Key Features

Permanent Plasticity: Remains elastic and formable throughout the life of the insulating glass unit—no curing or hardening.

Superior Airtightness: Prevents gas escape and moisture penetration, protecting against fogging and seal failure.

Excellent Adhesion: Bonds reliably to aluminum, stainless steel, and glass surfaces with no need for primers.

Low MVTR: Extremely low moisture vapor transmission rate ensures maximum insulation efficiency and glass clarity.

Non-Fogging & Clean Finish: Special formula prevents outgassing or residue buildup inside the IGU.

UV and Aging Resistance: Maintains performance even in harsh weather conditions and direct sunlight exposure.

Eco-Friendly & Low VOC: Solvent-free and safe for use in environmentally sensitive manufacturing environments.

Typical Applications

Double and Triple Glazing Systems: Used as a primary sealant in IGUs to ensure long-term sealing between glass and spacer bars.

Architectural and Commercial Glazing: Ideal for energy-efficient windows, curtain walls, and facade glass in residential and commercial buildings.

Solar Panels and Structural Glass Units: Provides gas-tight and moisture-resistant sealing in glass-to-metal bonding environments.

Automotive and Transportation Glazing: Applicable in specialty glass structures used in high-performance vehicle windows.

Technical Specifications

Property Value

Appearance Black (standard)

Application Temperature 110°C – 130°C

Operating Temperature Range -40°C to +90°C

Peel Adhesion (Aluminum/Glass) ≥1.5 N/mm

MVTR (Moisture Vapor Transmission) ≤0.05 g/m²/24h

Specific Gravity 1.3 – 1.5 g/cm³

Shear Strength Excellent

UV Resistance High

VOC Content <10 g/L

Shelf Life 12 months (sealed, cool storage)

Storage & Handling

Store in a cool, dry, and well-ventilated area. Keep sealed until use to avoid contamination. For optimal performance, apply the sealant using professional hot-melt extrusion systems within the recommended temperature range. Avoid overheating the product during application.

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 Insulating Glass With Permanent Plasticity

FAQ (Frequently Asked Questions)

Q1: What does “permanent plasticity” mean in this sealant?

A1: It means the sealant remains permanently pliable and does not cure or harden. This ensures flexibility and adaptability of the joint over the life of the IGU.

Q2: Is this sealant suitable for structural glazing or secondary sealing?

A2: It is primarily designed for use as a primary sealant in IGUs. For structural bonding or secondary sealing, silicone or polysulfide sealants are recommended.

Q3: How does this sealant help prevent fogging in insulating glass?

A3: Its low MVTR and non-fogging formula prevent moisture ingress and outgassing, helping maintain internal clarity and avoiding condensation between the glass layers.

Q4: Can this be used with warm-edge spacers?

A4: Yes. It is compatible with traditional aluminum spacers as well as many types of warm-edge spacer systems. Testing is recommended for custom systems.

Q5: Does it require curing time after application?

A5: No. The hot melt sealant solidifies on cooling and does not undergo any chemical curing, which improves production efficiency.

Q6: What safety precautions should I take during application?

A6: Wear heat-resistant gloves and protective eyewear when operating hot-melt machines. Ensure proper ventilation to maintain safe operating conditions.

Q7: How long will the sealant maintain sealing performance in an IGU?

A7: When properly applied and combined with a suitable secondary sealant, it can last 20+ years, depending on environmental conditions and IGU design.

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.