Skip to Content
mobile menu


Composite Mechanical Protection for Directionally Drilled Pipelines

The patented Scar-Guard® line of products is designed to protect field joint and mainline coatings from the mechanical stresses and scarring associated with horizontal directional drilling (HDD), boring and micro-tunneling of pipelines.

Scar-Guard® is a composite abrasion resistant overcoat comprised of fiberglass cloth and pre-impregnated fl exible resin that is activated by water and cured within minutes. This sacrificial outer laminate system protects preapproved anticorrosion field joint coatings and mainline coatings such as FBE, liquid epoxies, shrink sleeves, and tapes. The Scar-Guard® line of products minimizes the need for costly repairs after pull back, and provides robust protection of the underlying pipeline coating. U.S. Patent #8522827

Bury, Bore or Drill with Confidence

  • Provides unparalleled protection against impact, abrasion, gouge, punctures and tears that may result from directional drilling, rough handling, native backfills or severe in-service conditions

Cure Options for any Environment

  • Fast cure, slow cure, UV-Curable, UV-Resistant – all available options to suit a wide range of project cycle time requirements and construction conditions


  • Suggested voltages for high-spark voltage testing as per NACE SP0188 pass through Scar-Guard® to ensure the anticorrosion coating can be tested for integrity after pull-through and protected for the lifetime of the asset.

Fast, Easy Installation

  • Scar-Guard® products are simply wrapped onto the existing coatings surface and activated by water. Pre-impregnated moisture cured polyurethane resin means - no field mixing or saturation required!

Product Properties

Properties Test Method Scar-Guard® Scar-Guard® XL
Total Thickness SSPC-PA-2 68 mils 104 mils
Thickness per Layer SSPC-PA-2 34 mils 13 mils
Density ASTM D792 n/a 1.15 g/cm3
Colour Visual Grey Grey
Resin Type Per Manufacturer Polyurethane Polyurethane
Impact Resistance ASTM G14-04 48 Joules 49 Joules
Gouge Resistance CSA Z245.20.10 16 mils at 50 kg 24 mils at 50 kg
Abrasion Resistance ASTM D4060 1667 cycles/mil 1467 cycles/mil
Compressive Strength ASTM D695 27,182 psi 24,000 psi
Tensile Strength ASTM D638 n/a 248 MPa
Dielectric Strength ASTM D149 263 V/mil 114 V/mil
Adhesion to existing coating (FBE) ISO 21809-3 Annex C Rating 1 Rating 1
Hardness (Shore D) ASTM D2240 78 @ < 75°F 78 @ < 75°F
Cure Schedule*
Pot Life (Gel Time) 100-gram resin mass 12 min 8 min
Hard Dry Time (Shore D > 70) ASTM D2240 30 min 28 min

*Cure times were tested at an ambient temperature of 24°C (75°F).

Applications / Assets

  • Girth-Weld Joints
  • Mainline Coating


Last Updated: 1/31/2018 9:06:01 PM
Need more information?
Our Success Stories

Our Success Stories

Discover Shawcor integrated services and advanced technologies being applied to the world’s largest projects in the most extreme and challenging environments. Lookup for any project by Geo-location, Capability, Technology and Service provided.

View more success stories