Penetrant Wetting Agent

A substance which reduces surface tension and allows water to penetrate a soil and move through the soil profile. These types of wetting agent can help as a first stage of soil-water improvement, reducing some repellency conditions which contribute to water logging, and which is then followed up by the use of residual wetting agents which have a longer residence time within a soil, thereby also helping to retain water better, especially within sandy soils. A penetrant is a surfactant.