3M

3M SJ3540 Black Dual Lock Reclosable Fastener

SJ3540

3M™ Dual Lock Reclosable Fastener SJ3540 offer advanced closure alternatives to zippers, screws, snaps, hooks and more. They offer greater design flexibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications.

Black, interlocking mushroom-shaped heads provide strong, reliable and durable fastening that can be opened and closed multiple times
250 stem density per square inch; mates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinations
Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene

Color: Black

Liner Material: White Silicone Treated Polyolefin

Backing/Carrier Material: Polypropylene

Adhesive Type: Synthetic Rubber

TotalThickness: 138 mil

Overview
Customize
Features
Specifications
Compliance
Resources

Overview

Consult

Specify a finalized design or create a new one from scratch with our experienced converting experts.

Design

Pair our material sampling library with our precision converting capabilities to optimize and validate a prototype.

Produce

Rely on our top-tier suppliers, strict quality controls, and hands-on help to ensure your product's effectiveness throughout its lifecycle.

Customize

Customize This Material

Our wide range of converting capabilities allow us to take this material and transform it into the right width, length, shape or fabricated part to not only achieve ideal integration into your end use, but also optimize how you apply the material in your application. Our converting equipment paired with our expert engineering team will help you create the exact custom solution for your unique requirements.

To learn more about the most common converting services we offer, or to contact our team to start discussing your solution, please utilize the below links:

Tape Slitting

Die-Cutting

Custom Part Fabrication

Prototyping

Custom Length Rolls

Features

Black, interlocking mushroom-shaped heads provide strong, reliable and durable fastening that can be opened and closed multiple times
250 stem density per square inch; mates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinations
Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene
Strong fastener secures with an audible snap, verifying closure
An alternative to screws and bolts, hidden fastener provides a snug fit and smooth aesthetic appearance
Features good temperature resistance of 120°F
Best suited for indoor use
Adhesive features quick stick and a short dwell time

Specifications

Color	Black
Backing/Carrier Material	Polypropylene
Adhesive Type	Synthetic Rubber
Total Thickness	138 mil
Liner Material	White Silicone Treated Polyolefin
Liner Thickness	5 mil
Maximum Temperature Performance	140°F
Compatible Parts	SJ3542, SJ3541

Compliance

We value the importance of up to date an accurate regulatory information on the products we work with. For the most current Compliance and Regulatory information on your product of interest, please contact our experts for assistance.

Resources

Technical Data Sheet

3M™ Dual Lock Reclosable Fastener SJ3540 is a strong, reusable alternative to traditional fasteners like screws, nuts, and bolts.

Designed for durable, reclosable fastening that can be opened and closed multiple times, it bonds securely to a wide range of substrates, including many plastics and low surface energy materials.

Featuring interlocking mushroom-shaped heads at a density of 250 stems per square inch, SJ3540 delivers up to 5 times the tensile strength of standard hook-and-loop fasteners.

This fastener incorporates a synthetic rubber-based black PE foam tape with a pressure-sensitive adhesive that offers quick stick and short dwell time for fast, easy installation—no drilling, screwing, or sewing tools required.

Protected by a removable film liner, 3M™ Dual Lock SJ3540 provides a durable, secure fastening solution ideal for industrial, automotive, electronics, and general-purpose applications where strength and convenience matter.

Access panels
Interior signage
Decorative trim
Office partitions
Product IDs

3M