AFTC HA7412
AFTC HA7412 is a 0.047″ thick double-sided acrylic foam tape with a dual adhesive construction: a heat-activated hotmelt film on one side and a pressure sensitive acrylic coating on the other. The hotmelt side forms a strong, permanent bond with extruded EPDM and TP seals when heat-activated, while the acrylic side delivers a 90° peel adhesion of 24 lb/in per ASTM D3330. The tape is rated for long-term temperature resistance to 212°F and short-term exposure to 320°F.
Key Properties
- 90° Peel Adhesion: 24 lb/in | ASTM D3330
- Dynamic Shear Strength: 84 lb/in² | ASTM D1002
- Tensile Strength: 84 lb/in² | ASTM D897
- Temperature Resistance: -40°F minimum, 212°F long-term, 320°F short-term
- Liner: Red PE liner
- Total Tape Thickness: 0.047″ ±15%
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.047″ ±15% | — |
| Color | Gray | — |
| Material / Substrate | Coated Acrylic Foam | — |
| Core | Acrylic Adhesive Foam Core | — |
| Adhesive Type | Acrylic Coating 47 / Hotmelt Film | — |
| Adhesive System | Permanent Adhesive | — |
| Adhesive Side | Double Sided Adhesive | — |
| Liner | Red PE liner | — |
| Density | 52 lb/ft³ | — |
| Cell Structure | Closed Cell | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 84 lb/in² | ASTM D897 |
Thermal Properties
| Property | Value | Test Method |
| Minimum Temperature Resistance | -40°F | — |
| Short-Term Temperature Resistance | 320°F | — |
| Long-Term Temperature Resistance | 212°F | — |
| Recommended Application Temperature | Minimum 59°F | — |
Adhesion Properties
| Property | Value | Test Method |
| 90° Peel Adhesion | 24 lb/in | ASTM D3330 |
| Dynamic Shear Strength | 84 lb/in² | ASTM D1002 |
| 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 |
*Weight that ½ square inch will hold 10,000 minutes (7 days).
Environmental Performance
| Property | Value | Test Method |
| UV Resistance | Excellent | — |
| Solvent Resistance | Excellent | — |
Shelf Life / Storage
| Property | Value | Test Method |
| Shelf Life | 18 months | — |
| Recommended Storage Conditions | Store in original package in a dry place between 39.2°F and 100.4°F | — |
- Permanent bonding of extruded EPDM and thermoplastic seals to mating substrates
- Adhesion to high and medium surface energy plastics
- Bonding to glass surfaces and assemblies
- Bonding to steel and aluminum substrates
- Bonding to ceramic substrates
Common industries: automotive, sealing and gasketing, glazing, appliance, industrial assembly.
AFTC HA7412 is the thickest grade in the H-O Products Heat Activated tape series at 0.047″, engineered for double-sided bonding applications that require both a permanent heat-activated bond to extruded rubber seals and a pressure sensitive bond to a mating substrate. The construction consists of an acrylic adhesive foam core coated on one side with Acrylic Coating 47 and on the other with a hotmelt film, supplied with a red PE release liner.
The hotmelt side remains inactive at ambient temperatures until heat-activated, at which point it melts and fuses with extruded EPDM or thermoplastic seals to form a strong, permanent bond. The acrylic pressure sensitive side uses the same adhesive system found in the H-O Products Automotive tape series.
The tape exhibits excellent UV resistance and solvent resistance, with a closed cell foam structure and a density of 52 lb/ft³. Static shear performance is rated at 1,000 grams at 72°F and 500 grams at both 150°F and 200°F (½ in² holding for 10,000 minutes / 7 days per ASTM 3654). Recommended application temperature is a minimum of 59°F, and a minimum bond line pressure of 14.5 psi is required to achieve full adhesion.
End-strength is reached within 72 hours, or within 20 minutes when used with H-O Products primer 33 or primer 101. Shelf life is 18 months when stored in the original packaging at 39.2°F to 100.4°F.
What differentiates AFTC HA7412 from thinner grades in the AFTC heat activated series?
AFTC HA7412 is the thickest grade in the AFTC heat activated series at 0.047", offering the greatest gap-filling capability and the highest peel adhesion in the series at 24 lb/in — 50% higher than the 16 lb/in delivered by the 0.016" HA7404 and 0.032" HA7408. The thicker foam core also reduces dynamic shear strength to 84 lb/in² and tensile strength to 84 lb/in², compared to 94 lb/in² and 107 lb/in² respectively in the thinner grades.
Why is peel adhesion important for heat activated double-sided tapes?
Peel adhesion measures the force required to remove the pressure sensitive side of the tape from a substrate at a 90° angle. For heat activated tapes used to attach extruded EPDM or TP seals, the PSA side must maintain a reliable initial bond to the mating substrate (glass, metal, plastic, or ceramic) before, during, and after the hotmelt side is heat-activated. AFTC HA7412 delivers the highest peel adhesion in the AFTC heat activated series at 24 lb/in per ASTM D3330, making it particularly well suited to applications requiring high initial PSA grab.
What is the operating temperature range for AFTC HA7412?
AFTC HA7412 is rated for a minimum temperature of -40°F, long-term temperature resistance of 212°F, and short-term temperature resistance of 320°F. The recommended application temperature is a minimum of 59°F.
Is AFTC HA7412 suitable for low surface energy substrates?
The TDS recommends the use of a primer when bonding to low surface energy substrates such as polymers, powder coated metals, and porous materials including wood, cork, stone, and concrete. H-O Products offers primer 33 and primer 101; selection depends on the substrates and environmental conditions. Use of a primer also reduces end-strength development time from 72 hours to 20 minutes.
How should AFTC HA7412 be specified?
Specify grade (AFTC HA7412), width, length or roll configuration, liner type, application substrate, and finished format. A minimum bond line pressure of 14.5 psi must be applied during installation to ensure full adhesion.
