HOW DOES POLYPRUFE POLYUREA COMPARE TO OTHER BUND LINING SYSTEMS

Polyurea Vs Polyurethane Bund Linings

Polyurea is closely related to polyurethane. Both are two component systems made with Isocyanate-based materials. However, while the second component in polyurethane is polyol resin, the second component in Polyurea is a polyether amine. In terms of performance, conventional polyurethane’s require a catalyst, which is sensitive to temperatures and moisture. Low temperatures can slow the reaction and moisture can interfere with the reaction causing blistering and other negative effects. Polyurea, on the other hand does not require a catalyst. Reactivity for these coatings is fast, typically 3-10 seconds. Consequently they are able to cure at temperatures as low as -20 C and in the presence of moisture.

Polyurea Vs Epoxy Bund Lining

In terms of performance, unlike Polyurea, epoxies require a catalyst. They are sensitive to temperature, humidity and moisture, giving them a narrow window for application. Unlike Polyurea, epoxies have extensive cure time and little or no elongation properties. This leads to frequent failure of the coating with expansion or movement of the substrate.

Polyurea Vs Cementitiose Bund Lining

There are a number of cementitiose coatings available. They are mostly trowel or brush applied although some can be sprayed. Some claim a degree of flexibility. None have the flexibility or elastic properties of Polyurea. All of them have a long setting and then curing time. Cement based screeds can be made waterproof with additives such as SBR but they are then expensive and have long drying times.

Polyurea Vs Asphalt and Bitumen Bund Linings

Unlike Polyurea Aspalt and bitumen systems either require hot works or are multi layered. They require a longer period of time to lay and do not have the durability of Polyureas.

POLYPRUFE is a seamless membrane that can be handled and walked on within 10-12 seconds of application less from the time it is sprayed.

• POLYPRUFE spray is hydrophobic and therefore unaffected by damp substrates when creating non - bonded liners. It can be sprayed at temperatures as low as -30° C with minimal effect on tack free time
• Due to the almost instantaneous setting times, it can be built up to any thickness in one application including vertical and overhead applications.
• The cured elastomer has a high thermal stability with constant working temperatures up to 130° C and intermittent temperatures up to 160° C