3M Dual Lock Re-Closable Fasteners

Dual Lock fasteners described here consist of two types of continuous plastic strips with mushroom shaped stems. They are designed to engage together with one another to provide re-closable fastening for a wide range of applications.

• Dual Lock 400 - has a dense stem pattern of approximately 62 stems/cm². It locks together in any position and is generally the best choice for joining two surfaces when using the Pressure-Sensitive Dual Lock products.

• Dual Lock 250 - has approximately 38 stems/cm². It is a self-engaging fastener providing similar strength to Type 400 to Type 170 combination. It also reduces inventory as only one roll is required.

• Dual Lock 170 - has approximately 26 stems/cm². Besides general use with Dual Lock Type 400, it can also be mated to Scotchmate Loop products to provide an excellent high strength fastener with a limited re-closure life. SJ 3540 Range - Designed for general purpose kinds of dynamic and static load applications where temperatures do not exceed 49°C. SJ 3550 Range - Designed for high strength bond applications. These products can be bonded to paints, plastics, metals etc at a range of temperatures between -29°C to +93°C making them ideal for holding in head linings.

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