Air and excess water contained in the concrete is released through the weave of the permeable layer (woven fabric) and uniformly discharged out of the formwork through the drainage layer (non-woven fabric).

This reduces the water/cement ratio of the concrete surface layer, making the surface layer denser, increasing the strength of the surface layer, and inhibiting the penetration of deterioration factors into the interior.

¶ Improved aesthetics

Dramatic reduction of bubble marks on the surface

¶Improved durability

The denseness of the concrete surface layer is improved and the strength of the surface layer is increased. Improved densification of the concrete surface layer and improved air permeability will improve durability against neutralization and salt penetration caused by deterioration factors.

¶ Easy installation

Installation is possible with any type of formwork. Easy to cut and open on site. No need to drill drainage holes in the formwork and no need to use release material.

Use in the following areas is particularly effective.

Downstream face of dam/Structure Hunches/Levees/Roadway ground cover/curb/Tunnel inverts/Precast members