This product is a non-selective post-emergent herbicide that provides excellent control of unwanted grassy and broadleaf weeds. Eraser contains 41% Glyphosate with a surfactant included to increase effectivenes. It is easy to apply and works quickly to kill invasive plants. Eraser 41% systemic weed control is great for non-selective broad-spectrum control of annual and perennial weeds, woody brush and trees. this post-emergent systemic herbicide contains 41% glyphosate with a surfactant included to increase effectiveness.