Non-Fogging Butyl Hot Melt Sealant

Product Description

The Non-Fogging Butyl Hot Melt Sealant is a premium-grade, non-curing sealing compound engineered to offer superior adhesion and long-term clarity in moisture- and heat-sensitive applications. Unlike traditional butyl sealants that may release vapors or volatile substances causing condensation or film on enclosed surfaces (especially glass or lenses), this specially formulated sealant ensures no fogging, staining, or hazing during or after application.

This sealant is applied in molten form using hot melt equipment and quickly forms a flexible, airtight seal once cooled. It provides excellent performance in thermal insulation systems, lighting units, automotive assemblies, and other applications where maintaining visual clarity and material cleanliness is critical.

Key Features

Non-Fogging Formula: Specially engineered to eliminate fogging, misting, or oil migration on transparent surfaces.

Non-Curing & Flexible: Remains permanently elastic without hardening or cracking, accommodating expansion and contraction.

Clean Appearance: Ideal for visible or enclosed applications requiring a neat finish and long-term clarity.

Excellent Sealing Performance: Effectively blocks air, water, dust, and vibration.

Strong Adhesion: Bonds to glass, metal, plastic, and other standard construction and optical materials.

Low VOC & Solvent-Free: Free from harmful emissions—safe for enclosed or sensitive spaces.

UV & Thermal Resistant: Withstands environmental stress, temperature swings, and light exposure without degradation.

Typical Applications

Insulated Glass Units (IGUs): Ensures airtight seals between glass layers without causing fogging or residue inside the cavity.

Automotive Headlights & Taillights: Prevents condensation inside lighting enclosures by providing moisture-proof seals.

Display Panels & Monitors: Used to seal electronic screens and display housings, avoiding internal haze or film formation.

Solar Panel Modules: Protects against fogging on photovoltaic surfaces while providing reliable edge sealing.

Appliance and Lighting Assembly: Ideal for refrigerators, ovens, and LED fixtures where visual components are sealed.

Camera, Sensor, or Lens Enclosures: Maintains optical clarity in sensitive, sealed optical devices.

Technical Specifications

Property Value

Appearance Light Gray / Black / Custom

Application Temperature 150°C – 180°C

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

Peel Adhesion (Glass/Metal) ≥1.5 N/mm

Fogging Index (ISO 6452) ≤2 mg (non-fogging)

Softening Point ≥100°C

VOC Content <10 g/L

UV & Aging Resistance Excellent

Shelf Life 12 months (stored ≤35°C)

Storage & Handling

Store in a cool, dry, and ventilated area, away from heat and sunlight. Sealant must be kept in original packaging until use. Apply using standard hot-melt equipment with proper temperature control between 150°C and 180°C. Avoid overheating to prevent degradation.

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.

Non-Fogging Butyl Hot Melt Sealant

FAQ (Frequently Asked Questions)

Q1: What causes fogging in standard sealants, and how does this product prevent it?

A1: Fogging is caused by volatile substances like plasticizers or oils evaporating and condensing on cooler surfaces such as glass. This sealant is specially formulated to be non-fogging, meaning it contains no volatile components that can migrate and form haze.

Q2: Can it be used in IGU (Insulated Glass Unit) applications?

A2: Yes. It is particularly well-suited for IGUs where interior clarity and long-term sealing are essential. It prevents internal fogging that would affect window transparency.

Q3: Is it safe to use in enclosed electronic or optical housings?

A3: Absolutely. Its low VOC and non-migrating composition make it perfect for use in sealed environments like LED lights, cameras, or sensors.

Q4: How long does the sealant remain effective?

A4: The sealant remains tacky and elastic for many years, maintaining its sealing function without shrinking, cracking, or fogging, even under UV and temperature stress.

Q5: Does this sealant need curing time?

A5: No. It is a non-curing sealant that becomes solid upon cooling, enabling faster production processes and immediate performance.

Q6: Can it be applied manually, or does it require a hot melt system?

A6: It should be applied using a hot melt dispenser or machine set to 150–180°C. Manual application is possible with handheld hot melt tools for small-scale use.

Q7: Is there a visible residue or film after long-term use?

A7: No. The sealant is specifically designed not to release any compounds that would result in fogging, hazing, or surface contamination.

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.