Resolva 2 Action Concentrate is a dual action weedkiller. The first action is on the foliage of the plant while the second action tackles the roots. This approach means you get quick results with lasting effect as the weed will not come back. Resolva 2 Action Concentrate comes in 6 tube packs or 250ml bottles of concentrate. Use weed killer products safely. Always read the label and product information before use.