Protective Outer Wrap Systems

The outer wrap carries the ultraviolet, weather, soil-stress and handling loads over a completed primary system. Three outer wrap materials are manufactured in-house, so the outer layer is specified for the actual exposure rather than fixed by the primary tape.

TDS 14 · Outer wrap

Aluminium Foil Outer Wrap Tape

A cold-applied outer wrap built on a toughened aluminium-plastic composite foil backing with a mesh damping fabric interlayer, coated with a polyisobutylene-modified butyl rubber adhesive.

ColourSilver
Thickness range1.0–2.0 mm
Widths100 / 150 / 200 mm

Select it when: above-ground pipework, exposed valves and flanges, tank shells, process equipment and any asset in direct sunlight.

Data sheet (PDF) → Test report →

Also TDS 10

PE Anti-Corrosion Tape as outer wrap

Economical outer wrapping layer over a completed primary corrosion protection system on buried pipework. Supplied in thin- and thick-adhesive configurations, so the outer layer can be specified independently of the primary wrap.

Select it when: buried service where an additional continuous, moisture-excluding and electrically insulating outer layer is specified.

Backing tensile strength26.9 MPa
Peel to primed steel34.06 N/cm
Volume resistivity5.60 × 10¹³ Ω·m

Measured values from report CTG2409251378A_SR177AC.

See PE tape →

Also TDS 11

PP Fibre-Reinforced Tape as outer wrap

Mechanically reinforced outer wrap. The polypropylene mesh skeleton carries handling, backfill and soil-stress loads, so the primary corrosion barrier underneath is not required to resist mechanical damage.

Select it when: rocky or stony backfill, mechanical handling risk, road and rail crossings, directional drilling pull-in, and any section where installation damage is the governing risk.

Backing tensile strength77.6 MPa
Peel to primed steel42.8 N/cm
Electric strength16.4 kV/mm

Measured values from report CTG2410221378A_SR176AC.

See PP tape →

Choosing the outer wrap

Service condition	Outer wrap normally selected
Above ground, direct sunlight, UV exposure	Aluminium foil outer wrap
Above ground, no significant UV, appearance not critical	Aluminium foil outer wrap or PE outer wrap
Buried, normal backfill	PE outer wrap
Buried, rocky or stony backfill, high soil stress	PP fibre-reinforced outer wrap
Directional drilling, pull-in, road or rail crossing	PP fibre-reinforced outer wrap
Tidal, splash and submerged zone	Protective armour or jacket, project-specified
Valve chambers and confined details	Aluminium foil outer wrap or mechanical cover
Where no mechanical or UV exposure applies	Outer wrap may not be required

Final selection depends on the project specification, the installation method and the mechanical exposure the asset will actually see.

PE / PP tape

Both also serve as buried and mechanically loaded outer wraps.

Above-ground pipework

Where UV drives the outer wrap choice.

Petrolatum system

The primary wrap the outer layer protects.

Send us the asset, we will propose the system

Asset type, dimensions, operating temperature, exposure and estimated quantity are enough for us to return a system configuration, a material estimate and the supporting documents.

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