Foaming is an undesirable side effect of many industrial processes as it can reduce processing and storage capacity, decrease operating efficiencies, and create problems with product quality and performance. To effectively control the many disadvantages of undesirable foam, it is necessary to chemically break the films of liquid which surround the bubbles of gas released in processing with a defoamer, or to prevent the foam films from forming in the first place with an antifoam.

Silicone-based foam control additives are often the most cost-effective and efficient options for preventing and controlling foam. Due to their low surface tension, silicones spread evenly and rapidly over a foam film, facilitating penetration and collapse of the foam. They also possess the advantage of being non-contaminating, since they are inert and are typically effective at much lower concentrations than non-silicone defoamers.

Within our complete Foamkill™ line, Crucible offers several types of silicone defoamers and antifoams which offer highly effective foam control in a variety of applications and operating conditions. These include:

  • 100% active silicone compounds for nonaqueous and certain aqueous systems (detergents, hydrocarbon scrubbing, cutting oils, glycol formulations, etc.)
  • Silicone emulsions for easy dispersion in aqueous media
  • Solvent dispersions primarily for nonaqueous paints, coatings, inks, & oil & gas applications
  • Ready-to-dilute silicone concentrates for general foaming applications

Foamkill Intro Bubbles

Foamkill Silicone Antifoam Compounds

Foamkill Silicone Antifoam Compounds are special 100% active products designed to give optimum foam control and foam prevention in non-aqueous and certain aqueous systems. All Foamkill compounds are resistant to product separation and are easy to handle, low to medium viscosity fluids. They are chemically inert and resistant to oxidation. Foamkill compounds are effective even at high temperatures; they are non-volatile, and have flash points above 600oF.

Foamkill Silicone Antifoam Compounds

Foamkill Silicone Emulsions for Aqueous Solutions

Foamkill silicone emulsions are available for various industries to meet their specific defoaming requirements, including:

  • Foamkill 810, 830, S-20, 836A, 852, 875, R-22, CPD and FBF are useful in aqueous systems of all types. They are very efficient in preventing and suppressing foam formation in aqueous systems of all types.
  • Foamkill FBF is a mixture of silicone and organic compounds and is extremely stable under high shear and boiling conditions. It also acts as an effective wetting agent in many applications.
  • Foamkill 852 is the most “fisheye-free” among silicone-based defoamers. It is an excellent candidate for critical defoaming applications.
  • Foamkill 875 is an organo-silicone compounded defoamer, particularly effective in water-based inks, paints and adhesives, starch solutions, cutting oils, and detergent solutions.
  • Foamkill R-22 is a concentrated silicone emulsion defoamer primarily for use in wastewater treatment and agrochemicals.


  • Type: Nonionic emulsion blends of silicone and non-silicone materials.
  • Viscosity (25oC): Foamkill™ 810, 830, S-20, 836A, 852, 875, R-22, CPD and FBF are low viscosity emulsions in the range of 800 to 1,400 cps. Foamkill™ 810 is a slightly higher viscosity emulsion averaging 3,000 to 4,500 cps.
  • pH: 7.6 ± 0.5
  • Weight: 8.3 ± 0.1 lbs per gallon
  • Color: White
  • Storage: Over one year minimum. Not affected by repeated freezing and thawing. All Foamkill products can be autoclaved with no effect on stability or performance. Foamkill 810 and 830 should be stirred after autoclaving to insure product uniformity.

Foamkill Silicone Emulsion Applications & Use

The use of these emulsions should increase practical capacity in stills, kettles and other processing and storage equipment. They are especially useful in the manufacture of adhesives, pulp and paper, coatings, cutting oils, water base paints, latex, glycol extractions of aromatics in the petroleum industry, and in many types of food processing.

For maximum efficiency, add the appropriate Foamkill silicone emulsion to the aqueous system before foaming starts. Only low concentrations are needed to prevent foaming. The proper concentration is dependent upon temperature, system composition, viscosity, etc, but typically falls between 30 to 300 parts of Foamkill per million parts of the system. Best results are obtained when the Foamkill silicone emulsion is added as received, but dilutions with water can be made to aid in weighing, metering and processing.

Contact Us to Learn More

Crucible Chemical Company has been supplying standard and custom defoamer products for more than 50 years. These include silicone defoamers as well as antifoam agents based on other materials. We are eager to work with our customers to select the ideal Foamkill product that will solve their foaming challenges.

Please contact us to know more about Foamkill and other antifoaming agents we have available.

Don’t let foam be your problem — let it be ours.


Foamkill is a trademark of Crucible Chemical Company, Inc.