Benefits
- Differential adhesive construction allows each side to perform differently on challenging substrates.
- Strong LSE bonding helps improve adhesion to difficult plastics and other low surface energy surfaces.
- PET carrier stability supports precise converting and die-cutting.
- Thin 0.17 mm profile helps maintain a low-profile finished assembly.
- High initial adhesion supports efficient manufacturing and assembly.
- Suitable for bonding dissimilar materials such as foam-to-plastic and plastic-to-metal.
- Provides a practical solution when a conventional single-adhesive double-sided tape cannot optimize adhesion on both substrates.
Technical Specifications
| Property | Specification |
|---|---|
| Product | 3M™ Double Coated Tape 9490LE+ |
| Tape Type | Differential Double Coated Tape |
| Adhesive – Face Side | 3M™ Adhesive 300MP+ |
| Adhesive – Back Side | 3M™ High Strength Acrylic Adhesive 300LSE |
| Carrier | Clear PET / Polyester |
| Carrier Thickness | 0.013 mm (0.5 mil) |
| Face Adhesive Thickness | 0.071 mm (2.8 mil) |
| Back Adhesive Thickness | 0.086 mm (3.4 mil) |
| Total Tape Thickness | 0.17 mm (6.7 mil) |
| Primary Liner | Polycoated Kraft Paper (PCK) |
| Primary Liner Thickness | 0.11 mm (4.2 mil) |
| Liner Color | Tan |
| Product Color | Clear |
| Density | 0.91 g/cm³ |
Typical 180° peel adhesion of the face side after 72 hours at 22°C is approximately 8.7 N/cm on stainless steel, 5.7 N/cm on ABS and 5.5 N/cm on polypropylene. These are typical values, not product specifications.
Applications
3M™ 9490LE+ can be used in applications where the two bonding surfaces have different characteristics, including:
- Foam-to-plastic bonding
- Foam-to-painted surface bonding
- Fabric bonding
- Textile lamination
- Plastic component assembly
- Plastic-to-metal bonding
- Metal-to-plastic bonding
- Battery component bonding
- Gasket attachment
- Decorative component attachment
- Logo and nameplate attachment
- Electronics assembly
- Appliance component bonding
- Industrial component assembly
- Precision die-cut adhesive components
The product is particularly useful when one substrate requires the 300MP+ adhesive and the other benefits from the 300LSE adhesive. 3M specifically highlights foam and fabric bonding on the 300MP+ side and plastics, metals, glass and painted surfaces on the 300LSE side.
Compatible Materials
Low Surface Energy Materials
- Polypropylene (PP)
- Other LSE plastics
- Difficult-to-bond plastic surfaces
Plastics
- ABS
- Polypropylene
- Other engineered plastics
Metals
- Aluminum
- Stainless steel
- Other metal surfaces
Other Materials
- Glass
- Painted surfaces
- Foam
- Fabric
- Textile materials
- Gaskets
- Laminated materials
Actual adhesion depends on substrate composition, surface condition, texture, cleanliness and application conditions. Testing on the actual production substrates is recommended.
Industries
- Electronics
- Consumer electronics
- Automotive
- Appliances
- Battery manufacturing
- General industrial manufacturing
- Transportation
- Furniture
- Consumer products
- Foam converting
- Gasket manufacturing
- Industrial assembly
3M currently lists 9490LE+ within its Bonding Tapes portfolio and shows it across applications including manufacturing, automotive and appliance bonding.
Why Choose 3M™ Double Coated Tape 9490LE+?
The main advantage of 3M™ 9490LE+ is its differential adhesive design.
Instead of using the same adhesive on both sides, 9490LE+ combines:
- 300MP+ → optimized for foams and fabrics
- 300LSE → designed for strong bonding to challenging substrates
This makes the tape particularly valuable for assemblies involving different or difficult-to-bond materials. The PET carrier also provides dimensional stability, making the tape suitable for laminating, slitting and precision die-cutting.
For a die-cutting and converting supplier, 9490LE+ is especially attractive for custom adhesive gaskets, mounting components, foam laminations and precision die-cut parts.
Installation Guide
1. Prepare the Surfaces
Clean both substrates thoroughly. Remove dust, oil, grease, moisture and other contaminants.
2. Select the Correct Adhesive Side
Because 9490LE+ is a differential tape, identify which side uses 300MP+ and which uses 300LSE before application.
3. Cut the Tape
Cut or die-cut the tape to the required dimensions.
4. Apply the First Side
Remove the appropriate liner and apply the adhesive side to the first substrate.
5. Apply Pressure
Use firm, even pressure across the bonding area to maximize adhesive contact.
6. Remove the Remaining Liner
Carefully remove the second liner without contaminating the exposed adhesive.
7. Position the Second Substrate
Align the mating substrate accurately before making full contact.
8. Apply Firm Pressure
Press the complete assembly to establish intimate contact between the adhesive and substrate.
9. Allow Bond Development
Allow adequate time for the adhesive to develop its final bond strength before exposing the assembly to demanding loads.
Storage
For best performance:
- Store in the original packaging.
- Keep in a clean, dry environment.
- Protect from direct sunlight.
- Avoid excessive heat and humidity.
- Protect from dust, oil and chemical contamination.
- Avoid unnecessary exposure of the adhesive to the environment.
- Follow the latest 3M documentation for applicable shelf-life requirements.
For production applications, storage conditions should be verified against the current 3M technical documentation.
FAQ
What is 3M™ Double Coated Tape 9490LE+?
It is a differential double coated PET tape featuring 300MP+ adhesive on one side and 300LSE adhesive on the other.
What makes 9490LE+ different from conventional double-sided tape?
The two sides use different adhesives, allowing each side to be optimized for different substrates. This is particularly useful for dissimilar-material assemblies.
Is 3M 9490LE+ a PET tape?
Yes. It uses a 0.5 mil (0.013 mm) clear PET/polyester carrier.
What is the total thickness of 9490LE+?
The total tape thickness is 0.17 mm (6.7 mil), excluding the primary liner.
What adhesive is used on the face side?
The face side uses 3M™ Adhesive 300MP+, with a thickness of approximately 0.071 mm (2.8 mil).
What adhesive is used on the back side?
The back side uses 3M™ High Strength Acrylic Adhesive 300LSE, with a thickness of approximately 0.086 mm (3.4 mil).
Can 9490LE+ bond polypropylene?
Yes. 3M’s published data includes adhesion performance on polypropylene, and the 300LSE side is designed for difficult-to-bond substrates.
Can 9490LE+ bond foam?
Yes. 3M specifically identifies the 300MP+ side as suitable for bonding foams.
Can 9490LE+ be used for die-cutting?
Yes. The PET carrier provides dimensional stability that supports handling, laminating and die-cutting operations.
Is 9490LE+ suitable for LSE plastics?
Yes. The 300LSE adhesive side is specifically designed to provide high bond strength to difficult-to-bond substrates, including LSE plastics.
Is 9490LE+ suitable for metal-to-plastic bonding?
Yes. The differential adhesive construction makes it suitable for assemblies involving dissimilar materials such as plastics and metals, subject to application testing.
Downloads
Available upon request:
- 3M™ 9490LE+ Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- Product Brochure
- Precision Die-Cutting Capability Guide
Please contact our sales team if you require the latest technical documentation.
