Since only a very limited number of insulation materials can perform effectively outdoors without protective cladding, the use of metal jacketing is highly recommended. Metal jacketing serves as an essential outer barrier, ensuring the long-term performance and durability of insulation systems by shielding them from direct sunlight, mechanical impact, moisture, and chemical or physical contaminants.
Among various metals used for jacketing—such as stainless steel, galvanized steel, Aluzinc, and aluminized steel—aluminum stands out as the preferred choice for most industrial projects worldwide, thanks to its lightweight, excellent flexibility, good corrosion resistance, and cost-effectiveness.
Ebdaagaran Padideh (E.G.P.) manufactures insulation aluminum jacketing using high-quality 1000 and 3000 series aluminum alloys that comply with ASTM B-209 and EN 485 standards. Depending on application, these jacketing products are available with a range of moisture barrier types, including Polykraft, Super Polykraft, and Polysurlyn.
with Polykraft Moisture Barrier
with Super-Polykraft Barrier
with Polysurlyn Moisture Barrier
Insulation Ancillaries
Packaging and Delivery
Aluminum Jacketing with Polykraft Moisture Barrier
Polykraft is one of the most widely used moisture barriers in aluminum jacketing systems. It is composed of a polyethylene film laminated to a Kraft paper layer, forming an effective barrier between the aluminum surface and environmental moisture. This barrier prevents direct contact between the metal and corrosive agents, thereby reducing the risk of galvanic or chemical corrosion.
E.G.P. applies the Polykraft barrier using the continuous casting method, which ensures consistent and full-surface adhesion to the aluminum substrate. Compared to older lamination methods such as hot-roll pressing (which functions like an iron press), continuous casting offers major benefits: uniform bonding, reduced risk of delamination under harsh conditions, and enhanced mechanical and chemical resistance.
This advanced technology not only improves the product's final quality but also ensures reliable and long-term performance of the jacketing system in demanding environments. The barrier adds approximately 0.2 mm to the total thickness of the aluminum sheet.
Aluminum Jacketing with Super-Polykraft Barrier
Microorganisms, capable of thriving in extreme environments, can produce corrosive byproducts during their life cycle, leading to Microbiologically Influenced Corrosion (MIC). Among the most aggressive of these microbes are Sulfate-Reducing Bacteria (SRB), which are responsible for considerable damage to pipelines and industrial equipment.
MIC-related losses cost oil, gas, petrochemical, and power industries hundreds of millions of dollars annually. Estimates suggest that in the oil and gas sector alone, MIC accounts for over $100 million in damage each year.
In standard Polykraft barriers, the Kraft paper may contain sulfur-based compounds. When moisture penetrates the polyethylene layer, it can create an ideal environment for SRB growth, significantly increasing the risk of MIC.
To address this issue, E.G.P. developed and registered an innovative product called Super Polykraft. In this advanced barrier, the Kraft paper is fully encapsulated between two polymer layers. This construction not only inhibits microbial growth but also improves resistance to galvanic corrosion.
Following rigorous testing and certification by the Research Institute of Petroleum Industry, Super-polykraft was officially registered under E.G.P.’s name and is now widely recognized as a reliable solution for improving insulation durability and safety in major industrial projects.
Aluminum Jacketing with Polysurlyn Moisture Barrier (PSMB)
Moisture is a persistent threat to any metal jacketing system. Regardless of the type of insulation or application—whether hot, cold, industrial, commercial, or rooftop—moisture infiltration eventually leads to corrosion.
E.G.P. offers aluminum jacketing with Polysurlyn Moisture Barrier (PSMB), a high-performance, paper-free film made from co-extruded polymers, including DuPont™ Surlyn®. This triple-layer film is designed to offer superior protection without relying on Kraft paper.
As an advanced alternative to Polykraft, Polysurlyn offers near-zero water absorption, eliminating the risk of galvanic and microbial corrosion. Its paper-free structure also resists degradation, providing a long-lasting solution for corrosion control.
When insulation systems are improperly installed, moisture can seep through seams and combine with chemical contaminants in glass wool or mineral fiber, creating an acidic environment. This results in Corrosion Under Insulation (CUI), which is difficult and costly to detect and repair. Polysurlyn acts as a robust barrier against such infiltration, significantly extending the lifespan and performance of insulation systems.
For a barrier to truly protect the metal surface, it must be waterproof, free of pinholes, mechanically strong, abrasion-resistant, and durable. Polysurlyn is the only moisture barrier that meets all these criteria.
Key Benefits of PSMB:
- Near-zero water absorption compared to paper-based barriers
- Retains color, integrity, and structure even when exposed to moisture
- High scratch resistance during installation
- Long-term durability against a wide range of environmental conditions
- Compliant with ASTM E84 (<25/50 smoke/flame performance)
- ASTM C1729 Class A certified
E.G.P.'s Polysurlyn barrier is patented under registration number 99639 and is trusted as a proven solution for protecting metal jacketing in various industries.
You can think of PSMB as a small investment that prevents major future losses—essentially, a “lifetime insurance policy” for your insulation systems.
Comparison: Polysurlyn vs. Polykraft
| Feature |
Polysurlyn |
Polykraft |
| Structure |
Co-extruded 3-layer polymer film |
Two layers (polyethylene + Kraft paper) |
| Waterproofing |
No pinholes, fully waterproof |
Contains pinholes, moisture-permeable |
| Moisture Absorption |
None; prevents metal contact with water |
Kraft layer absorbs moisture, prone to corrosion |
Insulation Ancillaries
In addition to jacketing materials, E.G.P. also supplies a full range of insulation ancillaries, tailored for both industrial and commercial project needs. These items are available in various sizes and specifications and can be customized upon request.
Our range includes:
- Aluminum, stainless steel, and galvanized steel bands in 13, 16, 19, and 25 mm widths, packaged in 25 kg coils
- Matching banding clips in all materials and sizes
- Soft galvanized and stainless steel tie wires in various diameters, supplied in 25 kg coils
- Stainless steel self-tapping screws, washers (stainless steel and neoprene), and aluminum/stainless steel rivets in multiple sizes
- Mastic and sealing tapes, including neoprene and high-temp options for different environments
- Suitcase-type toggle latches in stainless steel, 1-inch wide, available in large and small sizes
- Spiral flat expansion springs in stainless steel, available in 5 cm and 10 cm lengths, 29 mm width
- Support rings and spider clamps made from stainless and carbon steel, suitable for pipes from 2 inches and above
Packaging and Delivery
All products are securely packaged in moisture-resistant plastic wrap and placed in durable wooden crates or pallets, depending on the item. Each shipment includes a product specification sheet. Customized packaging options are available upon customer request.
