Starbrite Marine Descaling Fluid - Concentrate

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Star brite Descaling Fluid is designed to safely and quickly remove scale, calcium deposits, corrosion, salt and carbon buildup in your raw water cooled systems. These deposits can cause your engine to run hot or result in AC system inefficiencies by restricting water flow through the cooling jackets, tubes and heat exchangers. Calcium and scale buildup also may damage your water pumps if debris is dislodged and allowed to flow down into pump housing. Descaling Fluid WILL NOT damage seals, gaskets, rubber impellers or hoses.

Star brite Marine Descaling Fluid can be recirculated through any system where descaling is needed. Recirculation allows for minimal dismantling and a faster return-to-service for equipment. The product can also be used as a soak by submerging components in the fluid to eliminate deposits.

NOTE: Marine Descaling Fluid may discolor some metals, chrome coatings, stainless and alloys. Proper education on how each system operates is critical prior to using Marine Descaling Fluid. Star brite is not responsible for damages due to improper procedure or use of product.

Mix 1 part Descaling Fluid concentrate for every 4 parts fresh water for all applications, including recirculating and soaking.

  • Removes scale and deposits from all marine engines
  • Will not damage engine seals, gaskets or rubber impellers
  • Available in Concentrate and Ready-To-Use formulas


Descaling by Recirculation:
1. Isolate and drain system to be descaled, making sure no raw water can be introduced during the process. Disable compressor or chiller to prevent operation during descaling. Flush system with fresh water to remove any remaining sea water prior to beginning.

2. Properly dilute Marine Descaling Fluid. Fill system with the required amount* of diluted Descaling Fluid. Set up a recirculating system with a suitable pump in which both inputs and outputs feed/drain solution from a container or bucket. Recirculate for 4-8 hours or until scale has dissolved. If pump unavailable, allow product to soak in the system for the same time. DO NOT seal the system off, as gassing will occur during the process and excess pressure may cause damage.

3. Drain solution from system and dispose in accordance with local, state and federal laws.

4. Flush system with fresh water to remove any remaining descaling fluid, and then reassemble properly. It is recommended to replace all sacrificial anodes at this time.

Equipment Soak:
Properly dilute Marine Descaling Fluid. Fully submerge equipment in diluted solution for 4-8 hours, or until scale has dissolved. Rinse with fresh water.

*Amount varies by system.

Please be aware that all products have a production or warehouse lead time. This is the number of business days (typically not including the day the product was ordered) that must pass before the item begins the shipping process. Please see the "Ships: In" information located within the main product description to the right of the product image and below the ADD TO CART button for that particular product's "Ships: In" timeframe.

IMPORTANT: Please note that these timeframes are estimates only based on the latest information provided to us by the manufacturer/supplier. Delays in both material, production and shipping timeframes by manufacturers can vary without advanced notice and while we do our best to keep "Ships: In" timeframes up to date we may not always be able to do so due to a variety of factors.

If a product is needed by a specific date we strongly recommend you reach out to our Sales team (1-800-869-1686) to verify shipping timeframes.

Canadian orders please add an additional 14 business days for processing and shipping. Alaska and Hawaii orders please add 1 additional warehouse processing day.

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