Dual Lock Fastener 3M SJ354B 25 mm x 2.5 m Black Flexible — reclosable fastening solution

3M Dual Lock Fastener SJ354B 25mm x 2.5m in black is a flexible reclosable fastening tape designed to provide a secure, low-profile connection between two surfaces. The product consists of interlocking mushroom-shaped stems that snap together to form a strong, removable bond. Supplied as a 25 mm wide roll with a 2.5 m length, this Dual Lock solution is intended for applications where repeated opening and closing is required without the need for mechanical fasteners.

Advantages

The flexible construction allows the fastener to conform to curved or irregular surfaces while maintaining reliable engagement. The interlocking mushroom heads deliver consistent retention and can be separated and rejoined many times without significant loss of performance. Its low-profile design minimizes visual impact and bulk when installed. The black color provides discreet appearance on dark surfaces and helps hide wear over repeated use.

Suitable for

• Reclosable panel and access door attachments
• Mounting electronic modules and small devices that require periodic removal
• Securing trim, cable management elements, or lightweight housings
• Temporary fixtures, displays, and signage that need repeated service

Key specifications

• Width: 25 mm
• Length: 2.5 m roll
• Color: Black
• Flexible fastener with interlocking mushroom-shaped stems
• Reclosable/reusable fastening mechanism

How to use

Clean and dry both surfaces before application to ensure optimal adhesion and engagement of the interlocking stems. Measure and cut the required length from the roll, then align and press the two mating strips together so the mushroom-shaped stems engage. For best results on curved surfaces, apply pressure along the strip to conform it to the substrate. To separate, peel the strips apart with a controlled pulling motion; avoid sharp lateral twisting that could damage the stems.

Usage recommendations

Use on clean, smooth substrates for the most consistent performance. Avoid prolonged exposure to solvents or sharp mechanical abrasion. For heavy loads or critical safety applications, evaluate load capacity in actual use conditions and consider mechanical fasteners or additional attachment methods if required.