What is Poly-Seal AF Butyl Tape?

Poly-Seal AF is an aluminum-faced, pressure-sensitive butyl mastic designed for duct joints, roof seams, and exterior sealing.

Where is Poly-Seal AF used?

It is used on HVAC ducts, metal roof seams, flashing joints, and general exterior waterproofing applications.

What makes Poly-Seal AF different?

Its aluminum foil facing provides superior UV, oxidation, and weather resistance for outdoor applications.

Can Poly-Seal AF be customized?

Yes. It can be produced in standard roll widths or precision die-cut shapes for specific applications.

What is Poly-Seal CR Butyl Tape?

Poly-Seal CR is a coating-ready butyl tape for roof seams and duct joints that can be painted or coated after installation.

Where is Poly-Seal CR used?

It’s used on metal roofs, flashing, and HVAC seams that require coating compatibility and aesthetic finishes.

What makes Poly-Seal CR unique?

Its surface accepts coatings while maintaining butyl flexibility and long-term adhesion.

Can it be painted immediately?

Allow the tape to bond to the substrate before applying coatings for best adhesion.

What is Poly-Seal PE-801?

Poly-Seal PE-801 is an HDPE-backed butyl sealant for hip-and-ridge roof sealing and flashing applications.

Where is it typically used?

It’s used in roofing joints, RV roofs, flashing corners, and other areas requiring instant waterproof sealing.

Is Poly-Seal PE-801 solvent-free?

Yes. The composition is free from asphalt and solvents for clean, long-lasting performance.

Can it be installed without primer?

On clean, dry, non-porous surfaces, primer is not required for a durable bond.

What is Poly-Seal SB Butyl Tape?

Poly-Seal SB is a 100% butyl adhesive tape used for bonding, gasketing, and sealing in HVAC and construction.

Common in HVAC joints, metal flanges, and outdoor sealing where durable watertight performance is required.

No. It bonds instantly with hand pressure and requires no curing or heat.

Can it self-heal around fasteners?

Yes. The butyl compound flows to fill gaps and seal around screws for leak-proof joints.

What is Poly-Seal TPO Butyl Tape?

Poly-Seal TPO is a butyl-based seam-sealing tape formulated for TPO and other roofing membranes requiring watertight joints.

Where is it typically used?

It is commonly used on metal roofs, HVAC curbs, skylights, RV roofs, and exterior flashing seams.

Yes. It is UV- and weather-resistant for long-term outdoor exposure.

Does it require heat or curing?

No. It forms an instant, watertight seal with hand pressure.

What is BF-1000 Silicone Foam?

An extra-soft closed-cell silicone foam for low-pressure sealing, vibration damping, and long-term environmental protection.

Where is BF-1000 used?

In lighting, HVAC, aerospace, transportation, and defense applications requiring durable flame-resistant seals.

What distinguishes BF-1000?

Low compression force, outstanding weather resistance, UL 94 V-0/HF-1 rating, and minimal compression set.

Is BF-1000 food-safe?

Yes, it complies with FDA CFR 177.2600 for indirect food contact.

Can BF-1000 have adhesive backing?

Yes, available with silicone or acrylic PSA options.

An ultra-soft, highly compressible closed-cell silicone foam for low-closure-force sealing and cushioning.

Where is BF-2000 used?

Electronics, avionics, HVAC, and aerospace applications needing minimal clamp force and long-term sealing.

How is BF-2000 unique?

Very low compression deflection, excellent UV resistance, and UL 94 V-0 rating.

Can it be die-cut or laminated?

Yes, available in sheets, rolls, and custom die-cut parts.

A medium-firm closed-cell silicone foam for industrial sealing, moisture resistance, and shock absorption.

Where is HT-800 used?

In enclosures, control panels, HVAC gaskets, and equipment requiring durable sealing.

What distinguishes HT-800?

Balanced density, strong resiliency, and UL 94 V-0 flame rating with wide temperature tolerance.

Can HT-800 be ordered as tape?

Yes, it is available as foam tape with various adhesive backings.

A soft closed-cell silicone foam with low closure force and enhanced sealing for electronics and transportation applications.

Where is HT-870 used?

In environmental seals for electronics, HVAC, and aerospace equipment where flame safety is critical.

What makes HT-870 unique?

Low compression deflection, minimal compression set, and UL 94 V-0 / HF-1 flame ratings.

Can HT-870 include adhesive backing?

Yes, high-temperature silicone and acrylic PSA options are available.

A soft silicone sponge providing light weight and durable sealing for outdoor and industrial applications.

Where is RS-870 used?

Outdoor lighting, electronics enclosures, HVAC panels, and vibration control pads.

How does RS-870 perform in heat and weather?

Maintains flexibility and sealing up to 392 degrees F with excellent UV and ozone resistance.

Is RS-870 available with adhesive backing?

Yes, available with pressure-sensitive adhesives and custom die-cut formats.

What is 2368 Conductive Silicone?

A silver-aluminum filled conductive silicone used for EMI/RFI shielding that meets MIL-DTL-83528 Type B.

In military and aerospace enclosures, radar, communications, and panel-to-chassis grounding.

What are its key properties?

Balanced conductivity, corrosion resistance, and high compression-set resistance with >120 dB shielding.

Can 2368 be die-cut or molded?

Yes. It is available as sheets, extrusions, or molded gaskets.

What is 2571 Conductive Silicone?

A high-durometer silver-copper filled conductive silicone for EMI/RFI shielding, meeting MIL-DTL-83528 Type K.

In rigid aerospace enclosures, structural panels, and defense systems requiring high compression stiffness.

What are its conductive properties?

Volume resistivity of 0.0006 Ω·cm and shielding effectiveness >140 dB across wide frequency ranges.

Can it be molded or extruded?

Yes, available in custom shapes, sheets, and extrusions for MIL-spec sealing applications.

What is 2573 Conductive Fluorosilicone?

A silver-copper filled conductive fluorosilicone designed for EMI/RFI shielding in chemical and fuel-exposed environments.

In aerospace and defense enclosures, connectors, and panels exposed to jet fuels and hydraulic fluids.

AFTC 5391 General Purpose Tape

Functional Equivalent to 3M 4991

Availability:

IN STOCK

MATERIAL/SUBSTRATE:

Coated Acrylic Foam

CORE:

Conformable Acrylic Foam

LINER:

Red PE Liner

DENSITY:

52 lb/ft3

MINIMUM TEMPERATURE RESISTANCE:

-40°F

SHORT-TERM TEMPERATURE RESISTANCE:

320°F

LONG-TERM TEMPERATURE RESISTANCE:

212°F

90° PEEL ADHESION [ASTM D3330]:

23 lb/in

DYNAMIC SHEAR STRENGTH [ASTM D1002]:

73 lb/in2

TENSILE STRENGTH [ASTM D897]:

73 lb/in2

STATIC SHEAR STRENGTH @ 72°F:

1,000 grams

STATIC SHEAR STRENGTH @ 150°F:

500 grams

STATIC SHEAR STRENGTH @ 200°F:

500 grams

CELL STRUCTURE:

Closed Cell

SOLVENT RESISTANCE:

Excellent

UV RESISTANCE:

Excellent

WATER RESISTANCE:

Excellent

Product Overview

AFTC 5391 General Purpose Tape — Technical Overview & FAQs

Product Overview

AFTC 5391 General Purpose Tape is a premium ultra-high-bond (UHB) acrylic foam tape developed for advanced structural bonding where exceptional adhesion, long-term durability, and environmental resistance are critical.
Its reinforced viscoelastic acrylic foam core offers outstanding shear and peel strength while absorbing vibration, impact, and thermal expansion between bonded surfaces.

AFTC 5391 is engineered to permanently bond metals, composites, glass, painted and powder-coated surfaces, and high–surface-energy plastics, delivering a clean, fast, and reliable alternative to mechanical fasteners, welds, screws, rivets, and liquid adhesives.

Suitable for high-performance OEM and industrial environments, AFTC 5391 is ideal for applications requiring extreme outdoor durability, temperature stability, and structural reliability in demanding conditions.

Applications

Automotive trim, emblems, panels, moldings, and exterior components
Industrial equipment and OEM assembly
HVAC housings, duct panels, and equipment mounting
Architectural cladding, signage, building panels, and façade attachment
Composite panel bonding and appliance manufacturing
Electronics mounting and device assembly
Fastener replacement in structural bonding applications

Key Properties

Material Type: Ultra-high-bond acrylic foam tape
Adhesive System: High-tack, reinforced acrylic pressure-sensitive adhesive
Foam Core: Viscoelastic foam distributes stress and absorbs vibration
Adhesion Strength: Exceptional adhesion to metals, coatings, composites, and glass
Shear Strength: Extremely high — suitable for static and dynamic structural loads
Peel Strength: Long-term, permanent peel adhesion
Thermal Performance: Engineered for reliability under extreme temperature changes
Environmental Durability: UV-resistant, solvent-resistant, weather-resistant
Outdoor Stability: Excellent long-term performance in exterior environments

Convertibility: Easily die-cut for precision OEM components

FAQs

What is AFTC 5391 General Purpose Tape typically used for?

AFTC 5391 is used for structural bonding in automotive, industrial, HVAC, architectural, appliance, and composite-panel assemblies where ultra-high bond strength is required.

How does AFTC 5391 compare to AFTC 5390 or 5389?

AFTC 5391 offers:

Enhanced cohesive strength

Improved adhesion to powder-coated and painted metals

Higher performance in dynamic load conditions

Superior long-term exterior durability

Increased vibration and stress-relief capability

Is AFTC 5391 suitable for long-term outdoor use?

Yes. AFTC 5391 is engineered for harsh outdoor exposure and resists:

UV radiation

Water and moisture

Humidity and weathering

Extreme temperature variations

Long-term environmental cycling

Which substrates bond strongest with AFTC 5391?

AFTC 5391 bonds exceptionally well to:

Aluminum, steel, and stainless steel

Composite materials

Painted and powder-coated surfaces

Glass, ceramic

High-surface-energy plastics

Can AFTC 5391 be converted into die-cut adhesive parts?

Yes. H-O Products provides precision die-cut AFTC 5391 components to support automated OEM manufacturing and high-volume production workflows.

Contact H-O Products today for AFTC 5391 General Purpose Tape in rolls, logs, or custom die-cut formats — or request engineering support to optimize your bonding application - contact us.