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Polyisobutene-based self‑healing corrosion protection

Corrosion attacks steel pipe wherever oxygen and moisture reach the surface: at joints, bends, valves, flanges and under insulation. Stopaq solves that without heavy surface preparation. ST2 cleaning is enough, and rust does not have to be ground off as long as the surface is clean of dirt. The cold‑applied visco‑elastic polyisobutene (PIB) compound flows into surface irregularities and shuts out oxygen and electrolyte, so the oxidation process stops. The compound is organic and never dries or cures, so it self‑heals small mechanical damage. No primer, no blasting, and compatible with cathodic protection.

ISO 21809‑3EN 12068NSF/ANSI 61WrappingbandCasing FillerOuterwrapHigh Impact ShieldOuterglass Shield

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Products

Stopaq, products

Wrappingband

Wrappingband

Cold‑applied visco‑elastic PIB wrap for the external corrosion protection of steel and ductile‑iron pipes, field joints and fittings, buried, submerged or above ground.

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Casing Filler

Casing Filler

Polyisobutene‑based filler pumped hot into the annulus between a casing pipe and the carrier pipe, for example at road, rail and waterway crossings.

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Outerwrap

Outerwrap

Mechanical protection tape with a butyl adhesive.

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High Impact Shield

High Impact Shield

Wrap‑around heat‑shrink protection sleeve over the Stopaq wrap on buried and submerged pipelines.

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Outerglass Shield

Outerglass Shield

Glass‑fibre fabric impregnated with a moisture‑curing polyurethane resin.

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Applications

Where Stopaq is used

Bare steel and irregular shapes: flanges, valves, supports, tanks, penetrations and buried lines. The same compound everywhere, wire brushing to St 2 is enough.

  • Piping and flanges
  • Steel structures
  • Buried lines
  • Crossings
  • Under insulation
  • Cladding and sealing
  • Cold lines
  • Splash zone
Steel structures and pipe bridges
Steel structures and pipe bridgesA pipe bridge's steelwork, joints and nodes wrapped in place. No dismantling, no blasting.
Valves and supports
Valves and supportsIrregular shapes: a valve, a flange and a pipe support on one line. The compound is shaped by hand.
Corrosion under insulation
Corrosion under insulationProcess pipe bends wrapped before the insulation goes back. Works on an already rusted surface.
Storage tanks
Storage tanksTank roof seams and the chime at the base, the usual leak points. Cold‑applied, no hot work on the tank.
Process piping
Process pipingHot and cold lines on one rack. Wrappingband for service from −45 to +70 °C.
Buried gas lines
Buried gas linesA valve station before backfill. Compatible with cathodic protection.
Road and rail crossings
Road and rail crossingsThe annulus between casing and carrier pipe filled with Casing Filler from a tanker.
Wind turbines
Wind turbinesThe joint between foundation and tower. No primer and no blasting kit to carry into the forest.
Wall penetrations
Wall penetrationsA pipe passing through a wall, where water stands and the steel is bare.
Layer build-up

Layer build-up

A conventional coating needs a clean surface, usually blasted and primed. Stopaq does not. Wire brushing to ST 2 is enough, and the visco-elastic compound flows into the irregularities that leaves behind and fills them. With oxygen and electrolyte shut out of the surface, oxidation stops. A mechanical overwrap goes on top.

Stopaq layer build-up on a steel pipe, magnified wall sectionMagnified section through the wall of a steel pipe. At the bottom the steel, cleaned by wire brushing to ST 2, so the surface stays irregular and not all rust has been removed. Above it the visco‑elastic polyisobutene compound, which flows into those irregularities and fills them completely. On top, a mechanical PE overwrap. There is no primer between the layers.No primer, no blastingMagnified12345KMP-0004
  1. 1Steel pipe, wire‑brushed to ST 2
  2. 2Surface irregularities the compound flows into
  3. 3Visco‑elastic polyisobutene (PIB) compound, cold‑applied
  4. 4Mechanical overwrap, for example Outerwrap
  5. 5The compound never dries or cures, so it self‑heals small damage
KMP-0004. Magnified section through the pipe wall: steel, compound, mechanical overwrap. No primer.
Range

The Stopaq range

The full Stopaq range in the manufacturer's own grouping. Ask us which combination suits your site.

Corrosion Prevention

  • Wrappingband CZ
  • Wrappingband CZ-DS
  • Wrappingband CZH
  • Wrappingband CZH-DS
  • Wrappingband CZHT
  • Wrappingband EZLT
  • Wrappingband EZ
  • Wrappingband EZHT
  • Wrappingband EZR
  • Basecoat
  • Basecoat H
  • Basecoat HT
  • Wrappingband WSH
  • 4100 Putty
  • Paste CZ
  • Paste CZH
  • Paste CZHT
  • Paste WSH
  • 4200 Filler
  • Casing Filler

Mechanical Protection

  • Outerwrap HSPE
  • Outerwrap HSPEX
  • Outerwrap PE
  • Outerwrap PVC
  • Outerwrap PVC-F
  • Outerwrap HTPP
  • Outerwrap Flex-PE
  • Outerwrap Flex-PE White
  • Intermediate Wrap PVC
  • High Impact Shield
  • High Impact Shield HT
  • Geotextile
  • EZ Topcoat
  • PE Repair Patch

Additional Mechanical Protection

  • Outerglass Shield
  • Outerglass Shield ARO
  • Rockshield
  • Soilstress arrestor

Insulation

  • Aluclad
  • Insulwrap

Sealing

  • 2100 Aquastop
  • Mortar
  • Repair Filler

Surface Preparation

  • SFL EP Primer

Need an article number or order code? The full catalogue is searchable. Product catalogue →

Applications

Applications

  • Buried pipelines
  • Refineries and process piping
  • Municipal water networks
  • Corrosion under insulation (CUI)
  • Tanks and steel structures
  • Preventive protection before corrosion starts
Smaller quantities

Small quantities for individuals and maintenance teams

Stopaq doesn't have to be ordered in industrial volumes. Smaller batches, single rolls, and maintenance-sized sets ship directly from the Tuusula warehouse. Ask about pick-up or delivery options.

Call 040-502 9474kampek@kampek.fi

Stopaq's visco-elastic matrix keeps re-sealing the joint for the pipe's whole service life.

Frequently asked questions

Stopaq, common questions

What is Stopaq used for?
Stopaq protects steel and ductile-iron pipes, field joints and fittings against external corrosion, buried, submerged or above ground. Typical uses are buried lines, process piping, tanks and municipal water networks.
What temperature does Stopaq withstand?
The operating temperature of Stopaq Wrappingband is −45 °C to +70 °C, with short-term thermal resistance to +90 °C. Casing Filler works from −20 °C to +35 °C and Outerwrap from −30 °C to +70 °C. The values are product-specific and come from the manufacturer datasheets.
Does Stopaq need blasting or a primer?
No. Stopaq is applied cold without primer, and wire brushing to cleanliness grade St 2 is enough. This speeds up the work and is feasible in field conditions.
What does self‑healing protection mean?
The visco-elastic polyisobutene compound in Stopaq stays soft for its whole service life. It flows into surface irregularities and fills small dents and cracks by itself, so a point defect does not start corrosion under the protection.
Is Stopaq compatible with cathodic protection?
Yes. Stopaq does not interfere with cathodic protection, so it can be used on cathodically protected lines. This matters on long buried transmission lines, for example.
Is Stopaq suitable for drinking water pipes?
Stopaq Wrappingband holds NSF/ANSI 61 approval, which covers materials for drinking water systems. The product also meets ISO 21809-3 and EN 12068 (KIWA) requirements.
Can I buy a smaller quantity of Stopaq for maintenance?
Yes. We also deliver smaller quantities for maintenance and repair work from the Tuusula warehouse. Tell us the quantity you need and we confirm availability and delivery time.

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