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Cast-O-Magic® Concrete Form Release Agent 320

320 Concrete Form Release Agent from Cast-O-Magic®


is formulated to produce superior concrete surfaces. It applies in a very thin film, and helps eliminate surface voids. It minimizes form cleaning, is non-staining, and will not transfer to concrete surfaces. This mineral oil based release agent excels in architectural wall panels, T and I beams and general precasting where appearance is important, and minimum form clean-up is desired. It has little or no odor and is non-irritating.


Cast-O-Magic® Release Agent 320 VOC Specifications


Physical Properties are:

  • Specific Gravity……………...0.875
  • Flash Point…………………..153°F
  • Boiling Point…………..  over 240°F
  • Freeze Temperature………….-15°F
  • Freeze Damage………………None
  • Wt./Gal…………………....  7.20 lbs
  • Viscosity(Centistokes)..3.34@ 40°C
  • Color………………………..Straw
  • Opacity………………………Clear
  • Solubility in Water……...Insoluble
  • VOC Content……440 Grams/Liter (3.67 lbs./Gal.)


Surface Preparation:

Form surfaces should be free of existing oil, rust, and concrete buildup prior to application. Release agent can be applied minutes or hours before casting.


  • Cast-O-Magic® 320 concrete form release agent should be applied in a thin film for a maximum performance and economy by spray, mop, roller, or brush.
  • It should be applied before reinforcing steel is in place.
  • Care should be taken to avoid over application.
  • Excess material in the form of puddles should be wiped up.
  • Over application can cause concrete build-up, soft spots, excessive surface voids and discoloration of concrete.
  • Overspray on adjacent surfaces can be removed with cleaning solvents.
  • Dilution with Kerosene, Diesel fuel, or mineral spirits is not recommended.
  • Dilution can cause concrete buildup and difficulty in stripping.
  • Dilution may also violate EPA VOC regulations.




  • Cast-O-Magic® 320 release agent will keep indefinitely in sealed containers.
  • Do not store near heat sources.
  • Cover, or store drums on side to prevent water contamination.
  • To be used as is. Dilution can cause concrete build-up and difficulty in stripping


  • On smooth, non-porous form surfaces such as steel, aluminum, plastic and high density plywood – 1800-2000 sq. Ft./Gal.
  • On semi-porous form surfaces such as medium density plywood and paper column forms – 1500-2000 Sq. Ft./Gal.
  • On very porous form surfaces such as low density plywood and concrete – 700-1500 Sq. Ft./Gal.
  • Coverages may vary due to person applying material and condition of forms.


Keep out reach of children. Do not take internally. Do not use near fire or open flame. Use with adequate ventilation and avoid prolonged contact with skin.



Basic Use:

Cast-O-Magic® 320 is a concrete release agent designed for use on many types of forms. It works well on metal, wood, ABS plastic, and fiberglass forms. It also works well to prevent sticking of concrete on pallets, mixers and other equipment.


  • Assures positive form release.
  • Minimizes surface voids.
  • Eliminates damaging and expensive form cleaning.
  • Will not stain or discolor white or colored concrete.
  • Will not impair bonding of surface coatings such as paint, plasters, mortars, etc.
  • Can be applied by any method.
  • Can be applied at any temperature.
  • Prevents rust on metal forms and waterproofs wooden forms.
  • Complies with EPA VOC Regulations.



Cast-O-Magic 320 VOC Concrete Form Release Agent Sizes


Cast-O-Magic® 320 is available in 55, 5, and 1 gallon containers. It is also available in disposable or recyclable 275 gallon Magic-Pak.


Material costs can be obtained by contacting The Hill and Griffith Company through our contact form.


Technical Services can also be obtained by contacting The Hill and Griffith Company through our contact form.


Cast-O-Magic® 320 should not be used on latex rubber molds.


Cast-O-Magic® 320 is a solution for releasing components dissolved in mineral oil carrier.

It contains no chlorinated solvents and no carcinogens. It is non-flammable and non-irritating.

VOC Cast-O-Magic Concrete Form Release Agent Magic Pack

Contact us for product information or request bulletins and technical papers.

Download a PDF version of this page.

Hydraulic Fluids and Specialty Industrial Lubricants

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Griflube® Slide-Way 68 & 220 Lubricants formulated using severely hydrotreated napthenic base oils and state-of-the-art additives


Metalworking Fluids

Grifcut™ Metalworking Fluids heavy-duty synthetic and semi-synthetic metalworking fluids



Murphy Spray Gun rugged cast iron high-solids, sprayer that can stand up to rough treatment and still provide a reliable pattern.
Pump Up Sprayer 3.5-gallon spray unit, funnel top tank for easy fill and closure


Bulletins and Technical Papers

“How To Lose A Customer in 10+ Easy Ways”, by Bob Waterloo, HG Distribution Manager
“How Safe & Legal Is Your Concrete Form Release Agent?”, by Bob Waterloo, HG Distribution Manager
“Proper Application of Concrete From Release Agents”, by Bob Waterloo, HG Distribution Manager

Form for requesting product bulletins and technical papers

Customer Service

Technical Services and Support - On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.

Request samples
Arrange a Casting Solutions® Visit


Packaging & Logistics

Custom Packaging
HG Logistics LLC



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