3M SJ3560 Dual Lock 250 Reclosable Fastener 1 in x 10 ft - Clear

In this review the 3M SJ3560/CLR1333 Dual Lock 250 reclosable fastener is assessed for workshop, prototyping and light industrial use; the bottom line is that it is a durable, clear reclosable tape best for applications where repeated secure closure and a discreet appearance matter. The reviewer found its mushroom-shaped stems and 250 pins per square inch provide a noticeably stronger interlock than conventional hook-and-loop, while the clear polypropylene carrier and acrylic adhesive make it suitable for bonding to glass, metal and many plastics. For jobs that need repositionable, high-strength closures without visible hardware, this product stands out.

Key Features

• 250 stem density: Delivers high closure strength with 250 mushroom-shaped stems per square inch for a secure interlock.
• Clear construction: The clear carrier and liner reduce visual impact for mounting on glass or finished surfaces.
• Strong adhesive: Acrylic 300 LSE adhesive bonds well to metals, glass and medium-to-high surface energy plastics for reliable hold.
• High engaged thickness: An engaged thickness of 0.23 in (230 mils) gives a robust mating gap for repeatable closures.
• Long closure life: Rated for about 1,000 closures, making it suitable for repeated access and repositioning tasks.
• Replaces mechanical fasteners: Can substitute screws, rivets or snaps where removable attachment is needed and appearance matters.

Who It's For

The Dual Lock 250 is aimed at technicians, product designers, display builders and hobbyists who need a strong, reclosable bond that stays discreet on finished surfaces. It is particularly useful for attaching panels, signage, small access doors or components to metal, glass or high-energy plastics where frequent opening and closing is expected.

It is not ideal for substrates with very low surface energy without a primer, nor for high-load structural joins that require bolts or rivets; users needing extreme heat resistance above the stated service temperature should consider alternate attachment methods.

Pros & Cons

Pros

• Exceptional interlock strength compared with hook-and-loop thanks to mushroom-shaped stems.
• Clear carrier and liner minimize visual impact on glass and painted surfaces.
• Acrylic 300 LSE adhesive provides dependable bonds to common high-energy substrates.
• Long usable life for repeated closures, rated around 1,000 cycles.

Cons

• Not the best choice for very low surface energy plastics unless surface preparation or primer is used.
• Engaged thickness of 0.23 in may be too thick for very tight-fit applications.

Specifications

Our Verdict

The 3M Dual Lock 250 in clear is a practical, high-strength reclosable fastener for anyone needing a neat, repeatable closure on metal, glass or medium-to-high energy plastics. It replaces visible hardware in many cases and offers good long-term closure life, making it a strong value for display work, enclosures and maintenance access panels where aesthetics and repeatability matter.

Frequently Asked Questions

Can this bond to painted surfaces?
Yes, the acrylic 300 LSE adhesive is formulated for medium-to-high surface energy paints but surface cleaning improves adhesion.

Will it mate with other Dual Lock types?
Type 250 can mate with type 170, 250 or 400, with higher combined types increasing closure strength.

What temperature range is supported?
The fastener is rated for service up to 220F, suitable for many indoor and light industrial environments.