ADVANTAGE #1: RD-6™ is a non-shielding coating. This means that if the coating ever becomes disbonded, the pipeline is still protected because cathodic protection currents can reach the disbonded area. Once there, the current will raise the pH of the water underneath the disbonded area to 9 or higher – a level too high to support corrosion. Additionally, the geotextile fabric backing of RD-6™ does not shield cathodic protection currents.

ADVANTAGE #2: RD-6™ is less likely to fail (to become disbonded) because:

• RD-6™ resists disbondment from the pipe, even if surface preparation is less than perfect.

• RD-6™ is highly resistant to soil stress, a major cause of coating disbondment.

• RD-6™ installs faster than almost any other coating, and requires no cure.

ADVANTAGE #3: RD-6™ is not a tape. North American pipeline operators have virtually banished solid film backed tapes and shrink sleeves. RD-6™ is quite different.

ADVANTAGE #4: RD-6™ has a long record of successful installations in the field.

The first installations of RD-6™ were in 1988. By 1992, the product was being widely used in North America. Today there are thousands of installations.

Polyguard RD-6 Coating System

RD-6™ pipeline corrosion coating is a system that allows cathodic protection currents to reach any disbonded area which occurs on the pipeline.

RD-6™ has been used on thousands of projects for over 19 years. Yet, to our knowledge, neither external corrosion nor SCC has been a problem under RD-6™.

PROPERTY	ASTM METHOD	TYPICAL RESULTS (METRIC)	TYPICAL RESULTS (ENGLISH)
Total Thickness - Single layer	D 1000	1.27 mm	0.05 inches (50 mils)
Tensile Strength, Wrap Direction	D 4632	34 kN/m	200 lbf/inch width
Tensile Strength, PSI	D 4632	27.6 MPa	4000 PSI
Elongation % at break (geotextile backing)	D 4632	< 20%	< 20%
Water Vapor Transmission Rate	E 96 Procedure B	.006 g/h•m2	.009 grains/h•ft2
Puncture Resistance	E 154	1379 kPa	200 PSI
Burst Strength	D 751	2413 kPa	350 PSI
Cathodic Disbondment77°F (25°C), 30 days, 1.5v	G 8	< 5 mm	< 5 mm (.197 in.)
Cathodic Disbondment 150°F (66°C), 90 days, 3.0v	G 42	< 10 mm	< 10 mm (.4 in.)
Non-shielding properties	Internal Polyguard*	Pass (non-shielding)	Pass (non-shielding)
Dielectric Strength (breakdown voltage, KV)	D 149	> 12 KV	> 12 KV
Adhesion to primed surface	D 1000 Method A	3.5 kN/m	20 lbf/inch width
Adhesion to polyethylene	D 1000 Method A	2.8 kN/m	16 lbf/inch width
Impact Resistance	D 1000 Method A	2.6 N/m	23.0 inch lb.

*Please refer to testing at this web address: www.polyguard.corrosioncoatings.com/rd-6-testing.html

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