The surface shall be cleaned thoroughly of all contaminants like dust, rust, traces of curing compound, oil and grease. These should be carefully removed by wire or stiff brushing and finally soft brushing or filtered compressed air to remove dust. Oil and grease should be removed by the use of a proprietary degreasing agent. Structurally unsound and friable concrete must be removed and repaired with a suitable concrete repair mortar. Old concrete and steel must be structurally sound prior to application.
For optimum adhesion to steel, grit blasting to SA21/2 is recommended.
AquaShieldPro Pro B55 can be applied to damp concrete, brick and plaster surfaces provided there is no free surface water or bleed. A test patch is recommended where there is doubt