Soil Moist Hydro is a synthetic acrylic copolymer. The product is designed to retain high amounts of moisture. The polymer will increase the moisture retention of the mulch matrix which is more conducive for seed germination. Soil Moist Hydro has a grade size of 100-700 microns. Use three to four pounds of Soil Moist Hydro per 1000 gallons of mix. Depending upon the water retention desired, soil type, site conditions and type of mulch used, one acre will require nine to sixteen pounds per acre.