Environmental or relative humidity (RH) can affect the performance of conductive adhesives and many ESD flooring materials.
When humidity is high, the adhesive or flooring material absorbs moisture and becomes more conductive; when RH is low, the adhesive or flooring material loses moisture and can become less conductive. To avoid fluctuations due to relative humidity, always test the floor in question in a humidity chamber at no higher than 12% RH for at least three days.
