A product for weed control, insect control, algae removal, or mold removal, comprising:
- (A) a transporter housing a composition, wherein the composition comprises, based on the total weight of the composition housed in (A), 2-40% citric acid and 1-50% potassium oleate, and;
- (B) organic acid or inorganic acid, and water;
- wherein the water and the organic acid or inorganic acid are housed within a bottle or container;
- wherein the product provides an end-use composition, at or near a time of use by a user, for weed control, insect control, algae removal, or mold removal when the composition housed in (A) is mixed with the water and organic acid or inorganic acid of (B);
- and
- wherein the citric acid and potassium oleate act as a synergist and surfactant for the organic acid or inorganic acid in the end-use composition.