Hot Melt Butyl Sealant for Insulating Glass

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Description: This 100% solid content, polyisobutylene-based hot melt butyl sealant is a single-component, solvent-free, non-fogging, non-vulcanizing, permanently plastic primary sealant for insulating glass units (IGUs). It maintains its plasticity and sealing properties over a wide temperature range without cracking or hardening. It exhibits excellent adhesion to glass, aluminum alloys, galvanized copper, and stainless steel. Its extremely low moisture vapor transmission rate creates a superior moisture barrier when used in conjunction with a secondary sealant.

Key Features:

1. Excellent adhesion to glass and aluminum spacers, providing high airtightness and strong bonding.

2. Superior UV resistance and water sealing performance.

3. Wide service temperature range and good extrusion properties.

4. Rapid curing time (approximately 1 minute).

5. Reusable: The hot melt butyl sealant removed from damaged IGUs can be reused, minimizing waste.

Benefits:

1. Eliminates the complex process of dual sealing in IGU manufacturing.

2. Increases production efficiency and reduces lead times.

3. Significantly lowers installation costs.

4. Superior moisture vapor barrier compared to traditional sealants (less than 1/60th the moisture vapor transmission rate of polysulfide sealants).

FAQ: 

1. How is hot melt butyl sealant applied?

   Hot melt butyl sealant requires application with a heated extruder at a temperature between 105°C and 135°C. It is applied to the aluminum spacer.

2. What are the primary uses of hot melt butyl sealant?

• A. Facilitates precise positioning of the aluminum spacer and glass panes within the insulating glass unit (IGU).

• B. Prevents moisture vapor transmission into the IGU, thus preventing fogging and condensation between the glass panes.

3. What are the typical dimensions (width/thickness) of the butyl sealant? 

• 903: 22.5-23 cm

• 902: 21.5-22 cm

• 901: 20.5-21 cm

4. Will butyl sealant react with other sealants?

   Butyl sealant generally does not react with typical secondary sealants used in IGUs (e.g., silicone, polysulfide). However, it is always recommended to perform a compatibility test before combining butyl sealant with other types of adhesives or sealants to ensure proper adhesion and prevent any adverse reactions.

5. What is the approximate coverage area?

   A roll with a diameter of 18 cm (180 model) can typically cover approximately 400 square meters.