PrimoChill PrimoPrep - Cooling Loop Pre-Treatment


SKU: PC-PPN/AAvailability : In stock - In Boise, ID USAIn StockOut of stock

  Since making our first coolant in 2002, PrimoChill has always strived to make the coolant usage as simple and reliable as possible.  A lot has changed in the water cooling... Read more


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Since making our first coolant in 2002, PrimoChill has always strived to make the coolant usage as simple and reliable as possible.  A lot has changed in the water cooling industry since than, but one thing has stayed the same and it is our drive to make products better and easier to use as well to maintain.

Primochill PrimoPrep was developed to address some of the most common issues that plague the computer water cooling industry.  The mixes of metals in water cooling, from nickel plating to raw copper and everything in between has always made some coolants not as reliable and simple to use. 

PrimoPrep's unique formulation pre-treats your cooling loop to ensure compatibility with today's high performance coolants as well as those incredible "Showcase Coolants".  The pre-treatment helps control the fluctuation of the PH levels in your system caused by high levels of copper mostly from large capacity radiators.  With this treatment it also prepares the system for use of coolants in a mix metal closed loop environment leaving the guesswork a thing of the past.

  • Water Based
  • Environmentally Responsible, Safe, and Non Toxic Product
  • Concentrate - Just Add to 32oz of DI or distilled water
  • Safe on All Plastics, Rubbers, and Miscellaneous Gasket Materials, Including Acrylic.
  • No special equipment (gloves, goggles) needed.
    • Bottle Size: 2oz
    • Dosage: Mix with 32oz of DI or distilled water
    • Shelf Life: 2 Years, Unopened
      PrimoPrep is 100% compatible with PETG and flexible tubing of all sizes.  It is safe to use on rubber, plastics and acrylics so rest assured all your seals, o-rings, reservoirs and such are all safe!

      Not compatible with aluminum water cooling components.


        For this pre-treatment to work correctly and last following the instructions below is VERY IMPORTANT. 

        Step 1: Install your cooling loop and double-check connections to ensure loop is “closed”. No Leaks!

        Step 2: Mix 2oz PrimoPrep bottle with 32oz of distilled or DI water.  Depending on the size of your system you may need more than one 32oz bottle.  Diluting this mixture will cause the pre-treatment to be less effective.  So please only mix the 2oz bottle with 32oz of water and then use that "Treated Water". 

        Step 3:  Fill your system entirely full with the "Treated Water", do this slowly to avoid spillage and creating air pockets.

        Step 4: Once filled with the "Treated Water" please turn on the system or your pump and let run for a minimum of 72hrs (3 days).  Running less than 72 hrs will make the treatment less effective.  You may use the pc while this treatment is being circulated, so game on.

        Step 5: After 72 hrs please drain the "Treated Water" and dispose. PrimoPrep can be safely disposed in your kitchen sink and/or any other drain

        Step 6: Fill you loop backup with di or distilled water and thoroughly flush your system till water till it runs clean. Inspect drained water for debris or foreign particles. Dispose of drained water. Repeat flush if needed.

        Step 7: Fill with your favorite PrimoChill coolant. 


        Not compatible with aluminum water cooling components.

        Not responsible for any hardware damage. Use at your own risk.



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        Shipping Policy:

        We ship via USPS and Fed Ex. For international orders, we ship via Fed Ex. Air shipments will be delivered via the selected carrier on the regular business day scheduling. Unfortunately, we cannot ship out orders for specific Saturday deliveries. During peak season, carriers suspend their delivery guarantees, and delays are expected.

        Same-Day Shipping:
        We strive to ship out every order the same day if the order is placed by 2:00 pm MST. If not, the order will ship out the next business day. Orders with custom powder coating (SX Colors) can take up to 1-4 business days to coat, inspect and pack, so please be aware. Selecting an overnight shipping method or rush fee will not ensure that your order ships the same day and is not guaranteed.

        Shipment Refusal:
        If a shipped order is refused or returned undelivered, there will be a mandatory 20% restocking fee, a $20.00 Return Service Fee, and no refund on the shipping cost. Please be aware that refusal is significantly more expensive than using your own carrier and is NOT recommended. 

        Damaged Items:
        All packages are fully insured at no additional charge.

        If you receive a damaged package, you must notify us within 48 hours of receipt. Sending back damaged merchandise voids the shipping insurance and no credit will be given. Damaged packages must be held for ten days with original packaging for carrier inspection. All packaging and packing materials must be kept for this inspection.

        If your package is marked delivered and not received, be sure to get in touch with immediately for further assistance.

        International Shipping:

        For international customers, please reference this page for duties/tax information. 

        Returns Policy for New Products:

        RMA Number:
        Returns will not be accepted without an RMA number provided by

        Product Return:

        Products returned for credit must be received within 30 days of the invoice, and a 15% restocking fee may apply. If 30 days have passed since your purchase, unfortunately, we can’t offer you a refund or exchange.

        All returned items must be in like-new condition with all related parts, including screws, manuals, etc. If you have lost, thrown away, scratched, or opened sealed boxes or bags – a higher restocking fee may apply upwards of 50%. Products with a fluid run through them are subject to these higher restocking fees.

        Only regular-priced items may be refunded, unfortunately, sale items cannot be refunded. This includes B-Stock and Used/Open Box Products.

        If a customer is misleading about the defect and evidence of incorrect installation/use or tampering has occurred, the return my denied, and a higher restock fee may be assessed, or the return may be denied entirely. A qualified technician will test each returned product for defects. will not assess a restocking fee for defective products.

        Return Shipping
        Customers are responsible for ALL return shipping charges on merchandise for any reason. Unless otherwise noted, shipping on products and returns is non-refundable, and returning a product comes at the customer's expense. The customer will be responsible for paying for shipping products/orders back to For no reason, do we refund the outbound shipping cost.


        Once an order is placed on our e-commerce website, it cannot be canceled or changed. This is because our fully automated systems immediately start processing the order, which cannot be stopped or reversed. Therefore, we advise customers to double-check their orders before making a purchase.

        Additionally, we would like to emphasize that our e-commerce website ships 98.5% of orders on the same day they are placed by 2:00 pm MST. Allowing cancellations after an order is placed would significantly slow down our shipping process and potentially affect the delivery times for other customers.

        We understand that it can be frustrating to be unable to cancel an order, but we ask for your understanding in this matter. By adhering to our cancellation policy, we can ensure that our automated systems and shipping processes continue running smoothly, allowing us to provide fast and efficient service to all our customers.

        We understand that sometimes mistakes can happen, and customers may accidentally order the wrong item or change their minds about a purchase. In such cases, we suggest that customers consider our return policy instead.

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        PrimoChill PrimoPrep - Cooling Loop Pre-Treatment