MASCO Catalog: Concrete Forming & Accessories

112 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville M A S C O . N E T FORM TREATMENT FORM RELEASE Form Release Guide Before application, forms need to be dry, clean and free of rust. Rust and dirt will transfer to the concrete surface. We often recommend treating new regular plywood with a lime water solution prior to it's first use in forming. This solution will neutralize the naturally occurring wood sugars in the plywood. Apply form releases only during dry weather. Apply with a low pressure spray using a wide angle, low flow, flat, fan type spray nozzle. Do not use a spray nozzle designed for curing compounds, it will over apply the material. All new wood forms require a heavy application of form release prior to their first use. This application should be heavy enough to saturate the wood forms. Multiple coats of form release are often necessary to accomplish this saturation, and we recommend waiting at least 5 to 6 hours between coats. On smooth, dense forms, i.e. steel or treated aluminum, the best performance will be achieved by spraying the form release followed by wiping down the forms with a clean soft cloth. Do not over apply. Over application can result in surface dusting and the formation of bug holes. Bug holes are caused by the "curtaining" formed by the excess release retarding the vertical movement of the entrapped air as the concrete is consolidated; rather than rising, the entrapped air follows the line of the "curtaining" creating bug holes. Neutral releases will not cause as much buildup on forms nor will they cause dusting as the reactive release will in the event of over application. Avoid over spraying onto reinforcing steel; it may act as a bondbreaker on reinforcing steel. All form releases do not behave the same when exposed to weather. In heavy rains, for example, some light bodies form releases will wash off the forms. We recommend checking the form release you are using for its "body" or thickness.