Self-heals cracks up to 0.4mm
Concrete panels were cast and then cracked by force after which they were subjected to the ponding of water to measure the flow through the crack. After four days the 0.38 mm crack on the Xypex treated sample had stopped leaking completely. The 0.25 mm crack in the control sample continued to leak after 25 days.
Protects concrete in acidic conditions
Cement mortar samples containing Xypex were subjected to 5% sulphuric acid for up to 12 weeks. Compared to untreated control samples, the weight loss caused by acid attack was reduced by 48%. In a further test on a 30% fly-ash mortar, the weight loss was reduced to 53%.
Protects concrete in sulphate environments
Samples of both Xypex treated and untreated concrete were placed in a highly concentrated sulphate solution. After 4 months the untreated samples experienced a weight loss of 4,800 g/m2 whereas the Xypex treated samples only lost between 5 g/m2 and 50 g/m2, showing no visible signs of surface deterioration.
Prevents infiltration & exfiltration of liquids even under extreme hydrostatic pressure
When subjected to 107 m (350 ft) of hydrostatic pressure Xypex treated samples completely resisted the flow of water and only allowed water penetration of 1.5 mm (0.06 in). Conversely, untreated control samples started leaking within 24 hours.