AFTC 821
AFTC 821 is a 0.008″ thick ultra-thin double-sided acrylic foam tape constructed with a closed-cell acrylic adhesive foam core, permanent closed cell acrylic adhesive on both faces, and a paper liner. At this low profile the tape is designed to be virtually invisible in assembled parts while providing reliable adhesion to glass, metal, and coated substrates across a wide range of molded components. It delivers a 90° peel adhesion of 15 lb/in and is rated for service from −40°F to 320°F short-term and 212°F long-term.
Key Properties
- 90° Peel Adhesion: 15 lb/in (ASTM D3330)
- Dynamic Shear Strength: 103 lb/in² (ASTM D1002)
- Tensile Strength: 111 lb/in² (ASTM D897)
- Static Shear Strength @ 72°F: 1,000 grams* (ASTM 3654)
- Long-Term Temperature Resistance: 212°F
- Total Tape Thickness: 0.008″ ±15%
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.008″ ±15% | — |
| Color | White | — |
| Material / Substrate | Uncoated Acrylic Foam | — |
| Core | Acrylic Adhesive Foam Core | — |
| Adhesive Type | Closed Cell Acrylic | — |
| Adhesive System | Permanent Adhesive | — |
| Adhesive Side | Double Sided Adhesive | — |
| Liner | Paper liner | — |
| Density | 52 lb/ft³ | — |
| Cell Structure | Closed Cell | — |
Adhesion Properties
| Property | Value | Test Method |
| 90° Peel Adhesion | 15 lb/in | ASTM D3330 |
| Dynamic Shear Strength | 103 lb/in² | ASTM D1002 |
| Tensile Strength | 111 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 |
*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 | 320°F | — |
| Long-Term Temperature Resistance | 212°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 | — |
- Ultra-thin bonding of small molded plastic and rubber components to glass and glass/epoxy substrates
- Low-profile adhesive attachment of trim and decorative elements to anodized and coated aluminum surfaces
- Near-invisible tape bonding of lightweight parts to stainless steel and galvanized steel assemblies
- Double-sided mounting of thin-profile components where white tape color is required against light substrates
- Permanent adhesive joining of small-format parts to coated aluminum in automotive and consumer product applications
Common industries: Automotive, consumer electronics, construction, fenestration, industrial manufacturing.
AFTC 821 is a 0.008″ ultra-thin double-sided acrylic foam tape designed for permanent adhesive bonding of lightweight, thin, and small components to glass, metal, and coated substrates. The closed-cell acrylic foam core and permanent adhesive system provide strong, durable bonds at an extremely low profile — making the tape functionally invisible in most finished assemblies. The White color is suited for applications where tape color must blend with light-colored, white, or translucent substrates and assemblies.
The tape provides excellent UV resistance, aging resistance, and solvent resistance for durable performance in exterior and chemically exposed environments. A minimum bond-line pressure of 14.5 psi applied by hand roller or mechanical presser is required for maximum adhesion. IPA is recommended for lightly to moderately contaminated surfaces; heavily contaminated surfaces require MEK, Heptan, or Acetone followed by an IPA wipe.
Raw aluminum must be abraded before bonding to displace embedded processing oils. Primer is recommended for low surface energy substrates including polymers, powder-coated metals, and porous materials, reducing cure time from up to 72 hours to approximately 20 minutes. Shelf life is 18 months stored in original packaging between 39.2°F and 100.4°F.
What differentiates AFTC 821 from AFTC 820?
AFTC 821 and 820 are identical in thickness (0.008"), adhesive construction, and all performance values. The sole distinction is color: 821 is White, while 820 is Black+ (gray core with black adhesive). AFTC 821 is selected when white tape is required to blend with light-colored or translucent assemblies.
Why is peel adhesion important when selecting this tape?
For ultra-thin tapes, peel adhesion is the primary measure of whether the bond will hold under real service conditions including vibration, thermal movement, and mechanical loading. For AFTC 821, the 90° peel adhesion of 15 lb/in confirms robust interfacial bond strength at just 0.008" total thickness, making it an effective adhesive solution where low profile and reliable bonding are both required.
What is the operating temperature range for AFTC 821?
AFTC 821 has a minimum temperature resistance of −40°F, a long-term temperature resistance of 212°F, and a short-term temperature resistance of 320°F.
Is AFTC 821 suitable for exterior or UV-exposed environments?
The TDS rates UV resistance, aging resistance, and solvent resistance as Excellent. No specific regulatory compliance standards are listed on the TDS for this material.
How should AFTC 821 be specified?
Specify grade (AFTC 821), thickness (0.008"), color (White), compliance requirements, dimensional tolerances, and finished format.
