What Is The Difference Between Coated And Extruded Butyl Tape ?

Although coated butyl tape and extruded butyl tape are both butyl sealing products, there are obvious differences in process, performance and application.

Coated butyl tape is usually produced by coating process, which evenly coats butyl adhesive on the surface of the substrate, such as aluminum foil, non-woven fabric, polyethylene film, etc., and then re-composite the separation film. It is characterized by thin adhesive layer, good ductility, and strong adhesion, making it suitable for large-area sealing and waterproofing. Common applications include roof waterproofing, wall crack repair, automotive sheet metal sealing, and moisture protection for electrical joints. Coated products have a neat appearance, can be pasted by tearing off the separator film during construction, and are easy to use, especially in the construction and decoration industries.

Extruded butyl tape is directly extruded by extrusion equipment to form butyl strips, without the need for substrate support. It is generally thicker, full of gelatin, and has excellent fillability and airtightness. It is commonly used for lap joint and screw hole sealing in automobiles, trains, containers and other fields, and is also widely used for edge sealing of insulating glass. Due to its flexible and malleable colloid, it can adhere tightly to irregular surfaces and provide long-lasting waterproof, dustproof and sound insulation.

In general, the coating type is suitable for surface coverage and rapid construction, emphasizing adhesion and extension. The extruded type is more suitable for structural filling and long-term sealing, emphasizing airtightness and durability. The two show their strengths in different scenarios to meet the diverse needs of construction, transportation, electronics and other industries.