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The outer shell of polyethylene foam is high-density polyethylene, also known as PE pipe or jacket pipe skin. Its appearance color characteristics: Yellow, red, black, and yellow jackets are also common, which change naturally to adapt to expansion and contraction changes, enhancing the expansion and waterproofing effect. It has a separate closed cell bubble structure and a honeycomb shaped pore joint distribution. The solidity of the adhesive with concrete is inseparable and integrated. The integration of nature into the rise and fall of Penghu has transformed and improved the actual effect of stopping water supply in Penghu.

Polyethylene foam can be divided into medium pressure polyethylene closed cell foam board (L-1100 type) and high-pressure polyethylene foam plastic board (L-600) according to the size of pressure bearing. The L-1100 type (also known as L-1400 type) is suitable for making cement joint filling boards for ordinary ditches and ponds.

Polyethylene closed cell foam rod and polyethylene closed cell foam board are the same in material, purpose and characteristics. There is no big difference, but one is round and the other is square. They are commonly used for filling and waterproofing of various concrete expansion joints. It has an independent closed cell bubble structure, with honeycomb shaped pores evenly distributed in appearance. Firmly and tightly integrated with cement adhesive. The polyethylene closed cell foam plate is naturally adapted to the changes of expansion and contraction, enhancing the expansion and water stop effect, and has a wide range of applications.

The internal structure of polyethylene foam material is closed cell, which is insulated by the gas inside the closed cell rather than polyethylene material. It has excellent resistance to water vapor infiltration. The built-in vapor barrier formed is both an insulation layer and a vapor barrier layer, and no additional vapor barrier layer is required. Polystyrene foam board can improve the errands of the wall, and also enhance the thermal insulation performance of the wall. Polystyrene foam board is conducive to the stability and continuity of indoor thermal insulation, and increases the use area of the house.