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$$29.95 () Includes selected options. Includes initial monthly payment and selected options. Details
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The Original AutoParts USA
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Ships from
The Original AutoParts USA
Return policy: Eligible for Refund or Replacement
This item is non-returnable, but if the item arrives damaged or defective, you may request a refund or replacement.
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BlueDevil Radiator & Block Sealer

4.1 out of 5 stars 113 ratings

$29.95

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  • Make sure this fits by entering your model number.
  • Permanent repair for radiator and block leaks.
  • Works effectively on plastic, aluminum and/or metal radiators
  • Contains no solids or fibrous materials.
  • Safe and Easy to use.
  • Guaranteed
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Always the perfect gift

Frequently bought together

  • BlueDevil Radiator & Block Sealer
  • +
  • BlueDevil Oil Stop Leak
  • +
  • BlueDevil Radiator Flush
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Important information

Safety Information

Keep away from children and avoid eye or skin contact. If eyes or skin become irritated, rinse with cold water immediately. If swallowed, drink large volumes of water and consult a physician if discomfort continues.

Legal Disclaimer

NOTICE: WARRANTEE VOID on product if purchased from any other amazon.com seller other then BlueDevil Products. www.gobdp.com NO EXCEPTIONS!


From the brand


From the manufacturer

head gasket sealer head gasket sealer head gasket repair Coolant Stop Leak radiator and block sealer
Head Gasket Sealer Pour-N-Go Head Gasket Sealer Pour-N-Go Head Gasket Repair Pour-N-Go Coolant Stop Leak Pour-N-Go Radiator & Block Sealer
Head Gasket Repair
Heavy Duty Large Engine
Non Clogging
Heater Core & Freeze Plug Repair
Radiator Repair
Pour-N-Go Technology
Compatible in all Cooling Fluids
Guaranteed Permanent Repair

Product Description

BlueDevil Radiator & Block Sealer is an easy-to-use formula that will repair and seal leaks in radiators and/or engine blocks. It does not contain solid or fibrous materials and will not clog or harm cooling systems. It will bond to plastic, cast iron, aluminum, alloy or metal. BlueDevil Block Sealer is compatible in gasoline and diesel engines. It is a guaranteed permanent radiator sealer.

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Product Warranty: For warranty information about this product, please click here

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What's in the box

  • 1x 16 Ounce bottle
  • Compare with similar items


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    Customer Rating 4.1 out of 5 stars (113) 4.2 out of 5 stars (193) 4.2 out of 5 stars (779) 4.1 out of 5 stars (332) 4.2 out of 5 stars (677) 4.3 out of 5 stars (147)
    Price $29.95 $16.86 $4.28 $6.04 $7.10 $19.74
    Sold By The Original AutoParts USA Amazon.com Amazon.com Moofin Amazon.com JBTools
    Brand Name BlueDevil Products Prestone Bar's Leaks Bar's Leaks Bar's Leaks Irontite
    Color Blue Grey Brown Blue
    Compatible Material Plastic, Metal, Aluminum Aluminum,Plastic,Metal Aluminum
    Item Dimensions 2.75 x 2.75 x 7.25 inches 1.91 x 3.04 x 5.64 inches 3 x 3 x 6 inches 1.8 x 3 x 6.5 inches 7.5 x 5 x 0.8 inches 2.38 x 2.38 x 8.13 inches
    Item Weight 1.00 lbs 0.80 lbs 0.69 lbs 6.72 ounces 1.60 ounces 1.00 lbs
    Material Plastic Plastic

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    Customer reviews

    4.1 out of 5 stars
    4.1 out of 5
    113 global ratings

    Top reviews from the United States

    Reviewed in the United States 🇺🇸 on November 7, 2022
    Reviewed in the United States 🇺🇸 on August 29, 2019
    One person found this helpful
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    Reviewed in the United States 🇺🇸 on April 14, 2016
    17 people found this helpful
    Report abuse
    Reviewed in the United States 🇺🇸 on July 22, 2022
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    1.0 out of 5 stars Product not as described.
    By Gigi on July 22, 2022
    First of all, the product is not advertised as pour-n-go. There are 2 versions of the product. One is a pour -n-go and one is not. I did not want the pour-n-go version but that is what I received. This item can not be returned so therefore I am stuck with it.
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    Reviewed in the United States 🇺🇸 on February 21, 2020
    2 people found this helpful
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    Reviewed in the United States 🇺🇸 on August 27, 2021
    Reviewed in the United States 🇺🇸 on December 17, 2019
    Reviewed in the United States 🇺🇸 on June 9, 2021