AFTC HA7612
AFTC HA7612 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 0.047″ thickness, it delivers a 90° peel adhesion of 28 lb/in and a dynamic shear strength of 107 lb/in², with UV, solvent, and water resistance all rated excellent. 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: 28 lb/in (ASTM D3330)
- Dynamic Shear Strength: 107 lb/in² (ASTM D1002)
- Tensile Strength: 94 lb/in² (ASTM D897)
- Long-Term Temperature Resistance: 194°F
- Liner / Carrier: Red PE liner; Acrylic Adhesive Foam Core
- Total Tape Thickness: 0.047″ ±10%
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.047″ ±10% | — |
| 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 | 28 lb/in | ASTM D3330 |
| Dynamic Shear Strength | 107 lb/in² | ASTM D1002 |
| Tensile Strength | 94 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 65°F | — |
Environmental Performance
| Property | Value | Test Method |
| Solvent Resistance | Excellent | — |
| UV Resistance | Excellent | — |
| Water 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 40°F and 95°F | — |
- Heat-activated bonding of extruded EPDM rubber seals to medium and low surface energy plastic substrates where maximum thickness compliance is required in the Coating 66 series
- 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
- Replacement of mechanical fasteners — including rivets, screws, spot-welds, and liquid adhesives — in automotive or industrial sealing assemblies
- Adhesive mounting to ceramic car paint or powder coated surfaces in applications requiring water resistance alongside heat-activated seal bonding
Common industries: automotive, transportation, industrial equipment.
AFTC HA7612 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: the pressure sensitive Acrylic Coating 66 face bonds to LSE substrates 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.
At 0.047″, this is the thickest grade in the Coating 66 heat activated series, providing greater bond-line compliance than the HA7604 and HA7608 grades. The TDS additionally lists this grade as suitable for replacing rivets, screws, spot-welds, and liquid adhesives. Note: all “Black+” tapes have a gray core and black adhesive.
The tape demonstrates excellent resistance to solvents, UV exposure, and water. 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 40°F and 95°F.
What differentiates AFTC HA7612 from HA7604 and HA7608, which share the same adhesive system?
All three grades use Acrylic Coating 66 / Holtmelt Film and target LSE substrates. HA7612 is 0.047" thick — the thickest in this sub-family — versus 0.016" for HA7604 and 0.032" for HA7608, providing the greatest gap-filling capability. HA7612 also explicitly rates water resistance as excellent, carries a higher minimum application temperature of 65°F (versus 59°F for the thinner grades), and has a storage range of 40°F–95°F rather than 39.2°F–100.4°F. Its tensile strength of 94 lb/in² is lower than the 105 lb/in² (HA7604) and 104 lb/in² (HA7608) values, while peel adhesion of 28 lb/in is slightly below the 29 lb/in of those grades.
Why is peel adhesion important when selecting an acrylic foam tape?
Peel adhesion — measured here at 28 lb/in per ASTM D3330 — determines how effectively the pressure sensitive face resists being peeled or lifted from the bonded substrate under service loading. For automotive sealing assemblies subject to vibration, thermal cycling, and environmental exposure, high peel adhesion on the Acrylic Coating 66 face is critical to maintaining bond integrity at the LSE substrate interface throughout the service life of the seal.
What is the operating temperature range for AFTC HA7612?
AFTC HA7612 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 HA7612 suitable for automotive or outdoor environments?
The TDS rates AFTC HA7612 as having excellent UV resistance, excellent solvent resistance, and excellent water 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 HA7612 be specified?
Specify grade (AFTC HA7612), thickness (0.047"), 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 65°F can be met at time of bonding.
