3M™ Dual Lock™ Reclosable Fastener SJ3870
Sleek, hidden snap‑on fastener with unmatched strength and durability—even in tough environments
What is 3M™ Dual Lock™ Reclosable Fastener SJ3870?
3M™ Dual Lock™ Fastener SJ3870 features black polypropylene mushroom-shaped stems backed with a modified acrylic adhesive.
With a closure thickness of 6.1 mm when engaged, it delivers a strong, hidden snap fit. Rated for up to 1,000 open/close cycles and offering up to 5× the tensile strength of standard hook-and-loop, this fastener performs reliably in both indoor and outdoor environments.
Technical Information
3M™ Dual Lock™ Reclosable Fastener SJ3870 Technical Details & Options
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Black
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Modified Acrylic
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40 Stems/cm²
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3.71mm
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6.1mm
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82°C
Benefits
Why Choose 3M™ Dual Lock™ Reclosable Fastener SJ3870?
3M solutions are engineered to deliver more than just adhesion, they improve processes, enhance durability, and open up new design possibilities. Each product comes with unique advantages that help manufacturers achieve stronger, cleaner, and more efficient results.
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Low-Profile Design
Compact 6.1 mm engaged thickness ideal for tight, streamlined assemblies.
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High Tensile Strength
Provides roughly five times the strength of traditional hook-and-loop fasteners.
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Extended Cycle Durability
Maintains at least 50% of original strength through up to 1,000 reclosures.
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Environmental Performance
Resistant to humidity and UV exposure; performs reliably up to 82 °C (180 °F).
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Positive Snap-In Engagement
Audible click confirms secure closure and creates a smooth, invisible bond line.
Delivering Excellence: What Our Clients Say
It is rare to deal with a company that is 100% efficient and 100% reliable while remaining courteous and friendly at the same time. RGH Converting is that rare find. We initially approached them with a complex material challenge, and their team acted as a true extension of our own, providing technical clarity and high-standard prototypes at impressive speed.
Their expertise as a 3M Preferred Converter gave us total confidence in the quality of the final product. I have no hesitation in recommending RGH to any manufacturer looking for precision, reliability, and a partnership-led approach.
Automotive Client
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Speak to our technical team about your project requirements and discover how our converting expertise can provide the right material solution for your application.
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Request a product sample to test performance in real-world conditions.
Our samples are a great way to evaluate suitability before scaling production and we’re here to support you every step of the way.
Suggested Applications
Where to Apply 3M™ Dual Lock™ Reclosable Fastener SJ3870?
Designed with versatility in mind, 3M products are used across a wide range of industries and environments. Here are some of the most common applications where these solutions add real value.
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Access Panels & Cover Attachments
Suitable for automotive and interior applications requiring repeatable fastening.
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Trim, Graphic & Signage Mounting
Ideal for displays, signage, and decorative panel installations.
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Office Partitions & Retail Panels
Provides secure, serviceable fastening for partitions and fixture panels in retail environments.
Common Industry Uses
Where is 3M™ Dual Lock™ Reclosable Fastener SJ3870 Used?
From sealing vehicle components to assembling electronics and creating durable retail displays, 3M products supplied by RGH are engineered to perform where it counts. Here are some of the industries putting them to work.
Product Guides
Need More Technical Detail for 3M™ Dual Lock™ Reclosable Fastener SJ3870?
Download the latest Product Guides to explore full specifications, application recommendations, and handling guidelines to maximise the performance of 3M™ Dual Lock™ Reclosable Fastener SJ3870.
Need a Clean, Reliable Snap-Fastener That Lasts?
Whether you’re designing for aesthetics, durability, or frequent access, our team is available to provide samples, consultation, and fast delivery.