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Amazon Best Sellers
Our most popular products based on sales. Updated hourly.
Best Sellers in
Cooling System Additives
#1
K-SEAL Coolant Leak Repair, ST5501 8oz, Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, and Freeze Plug - Pour and Go - Trade Trusted-Stop Leak
4.2 out of 5 stars
4,219
$12.47
#2
Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.
4.8 out of 5 stars
381
$14.06
-
$33.78
#3
Prestone AF-KIT Flush 'N Fill Kit
4.5 out of 5 stars
529
$3.44
-
$15.99
#4
K-SEAL Ultimate Permanent Head Gasket Repair ST3501 16oz Multi-Purpose Formula Stop Leaks in the Head Gasket, Cracked/Porous Blocks, Radiator & Heater Core. A True Pour & Go, Trade Trusted Stop Leak
4.0 out of 5 stars
363
$20.86
#5
Genuine Mopar Fluid 4318060AC Limited Slip Additive - 4 oz. Bottle
4.8 out of 5 stars
723
$10.16
#6
Subaru SOA635071 OEM Coolant System Conditioner
4.6 out of 5 stars
654
$4.98
#7
Motorcraft VC8 Diesel engine coolant additive - 1 Pint(473 ml)
4.7 out of 5 stars
114
$17.60
#8
Charge It CH-77QHD Heavy-Duty Concentrated Battery Additive, 32 fl. oz.
3.9 out of 5 stars
273
$29.99
#9
Subaru SOA868V9210 OEM Coolant - 1 Gallon
4.7 out of 5 stars
78
$38.67
#10
Rotella ELC Antifreeze/Coolant Concentrate 1 Gal.
4.9 out of 5 stars
57
$24.99
-
$152.08
#11
EVANS Cooling Systems EC42001 Waterless Prep Fluid, 128 fl. oz.
4.7 out of 5 stars
110
$29.95
-
$131.80
#12
Liqui Moly 20132 Radiator Stop Leak, 0.25 l, 1 Pack
4.4 out of 5 stars
90
$10.99
#13
Yukon Gear & Axle (OK 3-QRT-Conv-A) 80W90 Conventional Gear Oil with Positraction Additive - 3 Quart
4.7 out of 5 stars
61
$39.55
#14
Design Engineering 040200 Radiator Relief Coolant Additive for All Water Cooled Engines, 16 oz.
4.0 out of 5 stars
31
$15.78
#15
SUBARU Genuine Cooling System Conditioner Coolant Head Gasket 12 Pack Case SOA635071
5.0 out of 5 stars
9
$35.00
#16
Bar's Leaks Cooling System Repair - 16.9 oz
4.1 out of 5 stars
91
$10.85
-
$56.99
#17
Yukon (OK 4-QRT-A) Redline Synthetic Shock Proof Oil with Positraction Additive - 4 Quart
5.0 out of 5 stars
1
$96.65
#18
Red Line Water Wetter 12 oz (Pack of 2)
4.8 out of 5 stars
35
$20.99
#19
Motul 847405 Mocool Radiator Additive - 500 ml
4.5 out of 5 stars
53
$16.78
#20
Justice Brothers Radiator Stop Leak
1.0 out of 5 stars
1
#21
Bar's Leaks J-100 DiFM Cooling System Treatment - 5 Grams
4.4 out of 5 stars
68
$21.10
#22
Omix-ADA 17118.29 Cooling System Kit for Jeep Wrangler TJ (4.0L)
4.9 out of 5 stars
17
$64.80
#23
GOLD EAGLE/303 PRODUCTS ASBPI12 AlumaSeal Radiator Sealer, 0.71 Oz
4.7 out of 5 stars
60
$4.22
#24
Baldwin Coolant Additive,Chemical,CS5008
4.8 out of 5 stars
13
$5.90
#25
Mityvac MV4529 Cooling System Pressure Tester
5.0 out of 5 stars
3
$88.29
#26
Pencool 3000 With Stabil-Aid 300064 Cooling System Treatment - 1/2-Gallon Jug
4.8 out of 5 stars
24
$9.55
-
$20.41
#27
Red Line (80204) Water Wetter - Coolant Additives (12 PK Case)
4.6 out of 5 stars
12
$94.07
#28
Mishimoto - MMRALC Liquid Chill Radiator Coolant Additive
4.5 out of 5 stars
93
$16.33
#29
Hayden Automotive 526 Remote Transmission Oil Cooling System
4.6 out of 5 stars
109
$104.79
#30
Blue Oval Industries 1986-1993 Mustang GT LX 5.0 Heater Tube Assembly with Coolant Tube
4.6 out of 5 stars
8
$72.70
#31
RMI-25 Cooling System Treatment Quart
4.1 out of 5 stars
35
$29.89
#32
The 3 Pack of Irontite Additives - Thoro-Flush, All Weather Seal and Ceramic Motor Seal. 468-9190-16
4.4 out of 5 stars
56
$54.72
#33
Prestone AS107 / AS105 Super Radiator Flush,22 oz
4.4 out of 5 stars
84
$19.99
#34
EVANS Cooling Systems EC61001 Heavy Duty Waterless Engine Coolant, 128 fl. oz.
4.8 out of 5 stars
9
$49.76
-
$199.04
#35
Mishimoto Baffled Oil Catch Can Petcock Drain Kit
3.5 out of 5 stars
5
$49.95
#36
Royal Purple 1650 Royal Flush
4.4 out of 5 stars
55
#37
Hayden Automotive 525 Remote Transmission Oil Cooling System
4.1 out of 5 stars
31
$105.99
#38
TSI Supercool 39241B-YF Total Leak Stop and U/V Dye, 1 oz (HFC Free BOV Can with 1234yf Adapter, Retail Box)
3.4 out of 5 stars
45
$24.16
-
$66.29
#39
Lubegard 40820 Coolant Treatment for Motorcycles, 4 fl. oz.
$10.45
#40
Cool Shirt 5003-0001 Maintenance Fluid, 16 fl. oz.
5.0 out of 5 stars
2
$11.00
#41
Hapco Products - Cooling System Sealer (Pack of 1)
3.5 out of 5 stars
5
$26.49
#42
Rotella Ultra ELC AF/C Concentrate [1-gal. Jug]
4.5 out of 5 stars
16
#43
Klotz (KL-600 Nitro Power Additive
5.0 out of 5 stars
5
$26.23
#44
Omix-ADA 17118.28 Cooling System Kit (4.0L)
3.9 out of 5 stars
6
$73.00
#45
Bar's Leaks 1311-6PK Water Pump Lube with Anti-Rust - 12 oz, (Pack of 6)
4.3 out of 5 stars
25
$126.00
#46
Omix-ADA 17118.21 Cooling System Kit for Jeep CJ (4.2L)
3.7 out of 5 stars
8
$57.98
#47
Blue Devil Coolant Stop Leak (16 oz)
$23.95
#48
Bar's Leaks 1311 Water Pump Lube with Anti-Rust - 12 oz.
4.3 out of 5 stars
42
#49
Omix-ADA 17118.26 Cooling System Kit for Jeep Wrangler YJ (4.0L)
4.5 out of 5 stars
7
$69.98
#50
XADO ATOMEX Stop Leak Radiator Coolant/Antifreeze Additive - Restore Radiator Parts & Prevent Future Damage (Bottle, 250 ml)
3.6 out of 5 stars
11
$14.90
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