Weather and Concrete Conditions
- The Xypex treatment must not be applied under rainy conditions or when ambient
temperature is below 40°F (4°C).
- Because Xypex requires moisture to initiate the crystalline
waterproofing process, all concrete, whether fresh or old, must be
saturated with water. (Refer to "Wetting Concrete" under Preparation section.)
- The concrete surface must be a minimum of 20 hours old before application
of the Xypex coating treatment.
- For fresh concrete, the period between 24 hours and 72 hours is the
optimum time within which to apply Xypex, as the new concrete is still 'green' and
requires very little pre-watering.
For normal surface conditions, the coverage rate for each Xypex coat is 1.25 - 1.5 lb./sq. yd. (0.65 - 0.8 kg/m2).