AFTC HA7604
AFTC HA7604 is a double sided, closed cell acrylic foam tape constructed with two distinct adhesive systems: one side uses Acrylic Coating 66 pressure sensitive adhesive for bonding to medium and low surface energy substrates, while the opposite side uses a Holtmelt Film that is inactive at ambient temperatures and activates via heat to fuse permanently with extruded EPDM or TP rubber seals. Available at 0.016″ thickness, it delivers a 90° peel adhesion of 29 lb/in and an exceptional dynamic shear strength of 107 lb/in². The tape is rated for long-term service up to 194°F and short-term exposure up to 248°F.
Key Properties
- 90° Peel Adhesion: 29 lb/in (ASTM D3330)
- Dynamic Shear Strength: 107 lb/in² (ASTM D1002)
- Tensile Strength: 105 lb/in² (ASTM D897)
- Long-Term Temperature Resistance: 194°F
- Liner / Carrier: Red PE liner; Acrylic Adhesive Foam Core
- Total Tape Thickness: 0.016″ ±15%
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.016″ ±15% | — |
| Color | Black+ | — |
| Material / Substrate | Coated Acrylic Foam | — |
| Core | Acrylic Adhesive Foam Core | — |
| Adhesive Type | Acrylic Coating 66 / Holtmelt Film | — |
| Adhesive System | Permanent Adhesive | — |
| Adhesive Side | Double Sided Adhesive | — |
| Liner | Red PE liner | — |
| Density | 37 lb/ft³ | — |
| Cell Structure | Closed Cell | — |
+All “Black” tapes have a gray core and black adhesive.
Adhesion Properties
| Property | Value | Test Method |
| 90° Peel Adhesion | 29 lb/in | ASTM D3330 |
| Dynamic Shear Strength | 107 lb/in² | ASTM D1002 |
| Tensile Strength | 105 lb/in² | ASTM D897 |
| Static Shear Strength @ 72°F | 1,000 grams* | ASTM 3654 |
| Static Shear Strength @ 150°F | 500 grams* | ASTM 3654 |
| Static Shear Strength @ 200°F | 500 grams* | ASTM 3654 |
| Static Shear Strength @ 250°F | 250 grams* | ASTM 3654 |
*Weight that 1/2 square inch will hold 10,000 minutes (7 days).
Thermal Properties
| Property | Value | Test Method |
| Minimum Temperature Resistance | -40°F | — |
| Short-Term Temperature Resistance | 248°F | — |
| Long-Term Temperature Resistance | 194°F | — |
| Recommended Application Temperature | Minimum 59°F | — |
Environmental Performance
| Property | Value | Test Method |
| Solvent Resistance | Excellent | — |
| UV Resistance | Excellent | — |
Shelf Life / Storage
| Property | Value | Test Method |
| Shelf Life | 18 months | — |
| Recommended Storage Conditions | Store in its original package and in a dry place between 39.2°F and 100.4°F | — |
- Heat-activated bonding of extruded EPDM rubber seals to medium and low surface energy plastic substrates in automotive assemblies
- Attachment of thermoplastic rubber seal profiles to clearcoated or painted automotive body surfaces
- Bonding to silicone and Teflon substrates where conventional pressure sensitive tapes are insufficient
- Adhesive mounting to powder coated metal components in automotive or industrial sealing applications
- Interface bonding between ceramic car paint surfaces and extruded rubber trim or seal components
Common industries: automotive, transportation, industrial equipment.
AFTC HA7604 is a heat activated double sided acrylic foam tape designed for bonding medium and low surface energy substrates — including plastics, silicones, Teflon, powder coatings, clearcoats, and ceramic car paints — primarily in automotive sealing applications.
The construction combines two functionally different adhesive systems in a single tape: the pressure sensitive Acrylic Coating 66 face bonds to the substrate at ambient conditions, while the Holtmelt Film face is activated by a heat source and melts together with extruded EPDM or thermoplastic rubber seals to form a strong, permanent bond.
This dual-system approach allows the tape to serve as an interface between rigid or painted surfaces and extruded rubber seal profiles. Note: all “Black+” tapes have a gray core and black adhesive.
The tape demonstrates excellent resistance to solvents and UV exposure. As a pressure sensitive adhesive on the coating side, a minimum bond line pressure of 14.5 psi applied by hand roller or mechanical presser is required. For low surface energy substrates, primer use may be recommended; the AFTC line requires up to 72 hours to reach end-strength without primer, which is reduced to approximately 20 minutes with a compatible primer. Shelf life is 18 months when stored in original packaging in a dry environment between 39.2°F and 100.4°F.
What differentiates AFTC HA7604 from standard pressure sensitive AFTC grades?
AFTC HA7604 uses a dual adhesive system — Acrylic Coating 66 on the pressure sensitive face and a Holtmelt Film on the opposite face — rather than the same adhesive on both sides. The Holtmelt Film is inactive at ambient temperatures and is specifically designed to fuse with extruded EPDM or TP rubber seals when activated by heat, enabling a permanent mechanical bond to rubber seal profiles that cannot be achieved with pressure sensitive adhesives alone. It also has a notably lower density of 37 lb/ft³ and higher peel (29 lb/in) and dynamic shear (107 lb/in²) values than most standard 53-series grades.
Why is peel adhesion important when selecting an acrylic foam tape?
Peel adhesion — measured here at 29 lb/in per ASTM D3330 — determines how effectively the tape resists being peeled or lifted from a bonded substrate under service loading. For automotive sealing assemblies subject to vibration, thermal cycling, and environmental exposure, high peel adhesion is critical to maintaining bond integrity at the interface between the pressure sensitive face and the substrate throughout the service life of the seal.
What is the operating temperature range for AFTC HA7604?
AFTC HA7604 has a minimum temperature resistance of -40°F, a long-term temperature resistance of 194°F, and a short-term temperature resistance of 248°F.
Is AFTC HA7604 suitable for automotive or outdoor environments?
The TDS rates AFTC HA7604 as having excellent UV resistance and excellent solvent resistance. It is specifically described as designed for automotive applications including bonding to clearcoats, powder coatings, and ceramic car paints. No specific regulatory compliance standards are listed on the TDS.
How should AFTC HA7604 be specified?
Specify grade (AFTC HA7604), thickness (0.016"), color (Black+), liner type (Red PE), heat activation requirements (temperature and method for Holtmelt Film face), dimensional tolerances, and finished format. Confirm substrate type and surface energy level, and confirm minimum application temperature of 59°F can be met at time of bonding.
