Too Many Grades, Not Enough Clarity
When a heat-sealing jaw starts sticking, a release liner wears too quickly or a high-temperature process becomes inconsistent, the answer is rarely just “use PTFE tape.”
Operations and maintenance managers are often faced with a confusing range of choices: PTFE glass cloth tape, skived PTFE film, laminated constructions, zone tapes, open-mesh materials and specialist high-wear grades. Each may be described as non-stick, heat resistant or suitable for industrial use - but each behaves differently under pressure, temperature, flexing, abrasion and repeated production cycles.
The practical question is not, “Which PTFE tape is best?” It is: which construction is right for this machine, process and failure mode?
Brown International helps New Zealand manufacturers select PTFE tapes, fabrics and specialist constructions based on real operating conditions, including temperature, sealing pressure, product build-up, wear, required flexibility and maintenance expectations. Brown International supplies PTFE glass cloth and skived PTFE film tapes from specialist manufacturers including Saint-Gobain and Taconic, with local technical support and custom slitting for machinery-specific widths.
Start with the problem
A tape may fail early because the wrong construction was chosen - not because PTFE itself is unsuitable.
For example, a smooth film tape may be highly conformable but may not have the cut-through resistance needed on an abrasive guide or heavily loaded sealing jaw. Conversely, a reinforced glass-cloth tape can provide strength and dimensional stability but may be less suited to a tightly curved or highly contoured surface.
Before choosing a grade, identify what the material must do:
Release sticky product, film, adhesive, resin or food ingredients.
Protect a heat-sealing jaw, bar, wire or guide.
Withstand high process temperature.
Handle repeated pressure and compression.
Resist abrasion, cut-through or mechanical wear.
Conform around rollers, corners, curved surfaces or uneven equipment.
Allow airflow, venting or a specific level of heat transfer.
Reduce product marking or improve seal consistency.
This turns a vague request for “high-temperature non-stick tape” into a usable specification.
Glass cloth for strength and wear
PTFE-coated glass cloth tape is one of the most widely used choices for industrial heat sealing, release and wear applications.
Its fibreglass reinforcement provides strength, dimensional stability and improved resistance to cut-through, while the PTFE coating creates a low-friction, non-stick surface. Saint-Gobain describes PTFE glass cloth tapes as long-lasting, non-stick and abrasion resistant for high-temperature applications.
This makes glass cloth a strong option for applications such as:
Heat-sealing jaws and packaging equipment.
Guides, chutes and rollers exposed to sticky materials.
Protective surfaces subject to repeated contact or wear.
Liners where strength and stable dimensions matter.
General non-stick applications where the tape needs to stay flat and resist damage.
Glass cloth tape is available in different grades. Standard PTFE-coated glass cloth is often suitable where a smooth surface and dependable non-stick performance are required. Premium grades have a higher PTFE-to-substrate ratio and are intended for more demanding release applications, particularly where sticky materials are being processed.
The important trade-off is that glass cloth gives the tape more structure. This is valuable under pressure and wear, but it may not be the best solution where maximum conformability is the priority.
Skived PTFE film for conformability
Skived PTFE film tape is made from a thin PTFE film rather than a woven glass-cloth backing. It is generally chosen when a smooth, flexible and conformable surface is required.
Skived film tapes are used in high-temperature masking, electrical insulation, lining, wrapping, surface protection and release applications. Their high elongation helps them conform to curved surfaces, rollers, irregular profiles and tighter geometries where a reinforced tape may not sit evenly.
For a packaging or processing line, skived PTFE film can be a practical choice when the challenge is creating a smooth, low-friction release surface on a shaped component rather than resisting severe abrasion.
However, flexibility should not be confused with strength. If the surface is exposed to sharp edges, high compressive force, repeated cut-through or aggressive mechanical wear, a glass-cloth construction may provide a longer service life.
Zone tape for heat-sealing wires
Zone tape is designed for applications where full-width adhesive would create a problem.
In a zone-tape construction, adhesive is applied only in selected areas - often along one or both edges - rather than across the full tape width. This allows the uncoated centre section to sit over a hot wire or heating element without adhesive directly above it.
For L-sealers, vacuum sealers and related packaging equipment, zone tape can help prevent adhesive from burning onto the hot wire. It can also improve release and support longer wire life.
Zone tape is not simply a premium version of standard PTFE tape. It is a purpose-built construction for a specific heat-sealing problem. If the heating element sits beneath the centre of the tape, zone tape may be the correct answer; if not, a standard adhesive-backed glass cloth or film tape may be more appropriate.
Mesh and laminate options
PTFE-coated mesh and porous materials are selected when the process needs airflow, outgassing, drying or a more breathable release surface. They can be useful in drying, curing, bonding and textile-related applications where air needs to move through the material rather than being blocked by a continuous surface.
For example, an open construction may help a product dry or cure more effectively, but it may not be appropriate for a small, soft or sticky product that requires continuous support.
Laminated or multi-layer constructions can solve a different set of problems. Where a process needs more controlled heat transfer, improved strength, a particular release surface or a combination of properties, a laminate may be considered. The key is to define the process requirement first rather than assume that thicker always means better.
Thickness, coating weight, reinforcement, adhesive type and surface finish all affect performance. A thin material may provide better flexibility and heat transfer. A heavier construction may offer more durability and strength. The correct balance depends on the load, pressure, machine geometry and expected service conditions.
Temperature and adhesive matter
The backing material is only one part of the specification. The adhesive must also suit the operating environment.
Silicone adhesive systems are commonly selected for higher-temperature applications and clean removal, while acrylic adhesives are generally used where moderate temperature performance, higher tack or stronger adhesion are needed.
Taconic’s PTFE tape data lists silicone adhesive options with operating temperatures up to 260∘C, while listed acrylic adhesive options are generally rated to 177∘C. Actual suitability should always be checked against the product data sheet and the full conditions of use.
This distinction matters on heat-sealing equipment. A tape may have a PTFE surface capable of handling the temperature, but the adhesive system may be the limiting factor. Heat at the jaw, dwell time, pressure, cleanliness of the surface and removal requirements should all be considered before selecting a grade.
Make PTFE selection simpler
The right PTFE construction should reduce uncertainty, not create more of it.
For a reliable recommendation, Brown International can help assess the application based on the machine, temperature, pressure, wear pattern, product being processed and required outcome. That may mean specifying:
PTFE glass cloth tape for durable, stable and wear-resistant non-stick protection.
Skived PTFE film tape for smooth, flexible and conformable surfaces.
Zone tape for heat-sealing wires and bars where adhesive must stay clear of the heating element.
Mesh or porous PTFE materials where airflow and drying performance are essential.
Specialist laminates or reinforced grades for more demanding wear, pressure or process requirements.
A better-specified PTFE tape can mean fewer failed seals, less product build-up, reduced tape change-outs and greater confidence that a maintenance solution will last in production - not just look suitable on a data sheet.
