Hydro App Systems is the exclusive UK distributor of both the HydroApp® and EcoFiber range of hydraulic mulches. Blend or Not? Hydro App offer contractors the very best of both blended and 100% wood fibre options: EcoFiber 100% Wood Mulch is available with or without tackifier. HydroApp® Blended Mulch is a combination of 70% wood fibre and 30% cellulose fibre. Both are manufactured using Profile’s unique Thermally Refined® wood fibre, delivering greater yield to contractors than competing alternatives available on the market.