Products and Services Visco‑elastic Product SeriesViscoelastic Anti-corrosion Tape

Viscoelastic Anti-corrosion Tape

Viscoelastic tape is a self-adhesive tape mainly composed of polyisobutylene. It features stable chemical properties and excellent flexibility, and can permanently retain its viscoelasticity and cold flow property. It is applicable to joint coating of pipelines in special sections, anti-corrosion treatment of special-shaped fittings and repair of pipeline joint coatings.

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Core Features

Fully Sealed Anti-corrosion

It isolates air, moisture, acid, alkali and salt spray to block corrosive media and fundamentally restrain metal rusting

Fully Sealed Anti-corrosion
Cold-flow Filling & Sealing

With cold-flow property at ambient temperature, it automatically fills gaps, pits and irregular surfaces to achieve seamless wrapping

Cold-flow Filling & Sealing
Self-healing Long-term Protection

Minor damages can be repaired automatically for continuous protection and extended overall anti-corrosion service life

Self-healing Long-term Protection

Features

Ultra-simple Construction

No primer or heating required, with low surface preparation requirements. Direct wrapping shortens construction period and boosts working efficiency
Stable Weather Resistance

Applicable within the temperature range of -20℃ to 80℃. Resistant to acid, alkali, salt spray and aging with stable long-term performance
Excellent Conformability

Superior flexibility enables tight adhesion without peeling on complex curved surfaces such as valves, flanges and special-shaped fittings

Performance Indicators

Performance Requirements for Viscoelastic Anticorrosive Tape

Performance Item			Technical Indicators		Typical product values		Test Method
Appearance			Straight edges with flat and clean surfaces		Straight edges with flat and clean surfaces		visual estimation
color			Non‑black		green		visual estimate
Minimum thickness mm			≥1.8		2.07		ISO21809-3 Appendix A
Dropping Point Maximum Design Temperature+15℃（and shall at least＞80℃，48h）			No dripping		No dripping		ISO21809-3 Appendix J
Insulation Resistance a		RS100，Ω⋅m2	≥108		1010		ISO21809-3 Appendix K
Insulation Resistance a		RS100/RS70	≥ 0.8a		0.9		ISO21809-3 Appendix K
Peel strength N/cm	pair steel	-45℃	50	Adhesive layer coverage rate≥95%	80	Adhesive layer coverage rate 99%	ISO21809-3 Appendix D
		23℃	≥2		7
		Maximum design temperature	－		－
	pipe body anticorrosive coating	-45℃	50		80
		23℃	≥2		7
		Maximum design temperature	－		－
Peel strength after hot‑water immersion，N/cm （Maximum design temperature+20℃，100d）	pair steel	23℃	≥2	Adhesive layer coverage rate≥95%	6	Adhesive layer coverage rate 99%	ISO21809-3 Appendix D 和Appendix I
	pair steel	Maximum design temperature	－		－
	Pipe body anticorrosive coating	23℃	≥2		6
	Pipe body anticorrosive coating	Maximum design temperature	－		－
Peel strength after dry‑heat aging，N/cm （Maximum design temperature+20℃，100d）	pair steel	23℃	≥2	Adhesive layer coverage rate≥95%	7	Adhesive layer coverage rate 99%	ISO21809-3 Appendix D 和Appendix I
	pair steel	Maximum design temperature	－		－
	Pipe body anticorrosive coating	23℃	≥2		7
	Pipe body anticorrosive coating	Maximum design temperature	－		－
Lap shear strength，MPa		-45℃	≥1.0	Adhesive layer coverage rate≥95%	1.4	Adhesive layer coverage rate 99%	ISO21809-3Appendix L
		23℃	≥0.02		0.03
		Maximum design temperature	－		－
Volume Resistivity(Ω·m)			≥1×1012		4.5×1014		GB/T1410
Water absorption rate(%)			≤0.03		0.022		SY/T0414Appendix B
Chemical Resistance (Ambient temperature, 90 d)		10% NaOH	No bubbling and no peeling		No bubbling and no peeling		SY/T0315-2012 Appendix B
Chemical Resistance (Ambient temperature, 90 d)		3% NaCL	No bubbling and no peeling		No bubbling and no peeling		SY/T0315-2012 Appendix B
The insulation resistance after 70 days is less than 10 times that after 100 days（RS100/RS70 ≥0.8）

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Key Technology Performance Overview

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Application Areas

Anti-corrosion for Oil & Gas Pipelines

Joint coating protection for weld joints, tees, elbows and cathodic solder joints of buried pipelines
Anti-corrosion of Station Components

Sealing and anti-corrosion for special-shaped fittings including valves, flanges and tank edge plates
Pipeline Rehabilitation Projects

Repair of damaged anti-corrosion coatings on new and old pipelines, as well as protection for pipelines in high-humidity and salt-spray environments

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