ACID STICKS® are water-soluble sticks that are a combination of acid, surfactant, dispersing agent, iron sequester, and inhibitor that remove carbonate scale and rust deposits and lower injection pressures in water injection wells. Injection pressure drops of several hundred PSI have been observed following ACID STICK® treatments. Some oil wells, gas wells, and water supply wells have also experienced successful removal of carbonate type scales and rust deposits with ACID STICK®.


ACID STICKS® are dropped directly into the well or introduced to the system through the water supply tank. Dropping the stick directly into the well is best because not as much dilution will occur. In a well with tubing obstructions or small valve openings, ACID STICKS® may be successfully used by first dissolving the sticks in fresh water and then pumping or pouring the solution into the well. An alternative option if there are obstructions in the well is to try the Select Industries S&B Pellet.


The number of ACID STICKS® to be used is based on the number of feet of perforated interval or open hole and severity of scale build-up. Field tests indicate that the best results were achieved by using a large initial slug treatment (1.8 to 5.4 lbs of stick per foot of interval) followed by smaller periodic treatments (about half the initial slug amount).


FormSolidMelt Point123 f
ColorBrownSolubility in Water100%
pH2-3Solubility in Brine100%
Specific Gravity1.094Solubility in CrudeInsoluble

Safety and Handling

Please review SDS prior to using this product. As with all industrial chemicals, contact with eyes or skin should be avoided. Wash thoroughly with water if contact with skin is made. Sticks should be stored in a cool dry place. Always remove stick from plastic bag or cardboard tube before using. Bag or tube can be used as a glove to avoid contact with hands.