Compatible with hoat (orange) coolant?

Yes. With all coolents actually.

How much will a 12 once bottle treat? I have a 5 gallon system and will be adding it to used coolant.

First of all I would flush & refill your coolant. I recommend Prestone 50/50 Extended Life even if your vehicle calls for Dex-Cool. Go to any place that does coolant flushes. Used coolant will not get the same results. In new coolant, the results will vary. Water Wetter will be pushed to it's limits but will still work in a 5 gallon system. The temperatures might not drop enough if stretched out that far in a large system to condone the price paid. If anything does work in this category though, it is either Water Wetter or Royal Purple's Purple Ice.

Do I add this to the reservoir or the radiator?

Add it to the radiator, if you can.

Can I use this with just distilled water in the winter without using antifreeze?

I have tested the water wetter at a ratio of 12 oz of to 116 oz of distilled water. i buried the gallon jug halfway deep in the snow and came out and checked the next morning early and the mix was still fluid. test this for yourself.

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Red Line 80204 WaterWetter Super Coolant - 12 Ounce

Product ID: 2504591

Details

Brand
Red Line
Item Weight
340 Grams
Liquid Volume
0.34 Liters
Material
Aluminum cast
Package Information
Bottle

💧Doubles water wetting ability

⚙️Treats up to 5 gallons cooling system

🛡️Rust & corrosion protection

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Description

❄️ Stay cool, stay ahead — the secret weapon for serious drivers!

TRUSTED LEGACY - Red Line’s proven formula since 1979 keeps your engine cooler, longer
RACE READY PROTECTION - Use straight water safely with superior corrosion inhibitors
EASY DOSAGE BIG IMPACT - One bottle treats most passenger cars and light trucks effortlessly
VERSATILE COMPATIBILITY - Works seamlessly with all antifreeze types including DEX-COOL
MAXIMIZE COOLING EFFICIENCY - Boosts heat transfer for peak engine performance

Red Line 80204 WaterWetter is a premium 12 oz coolant additive that doubles water’s wetting ability to improve heat transfer, protects against rust and corrosion, and is compatible with all antifreeze types. Ideal for passenger cars and light trucks, it enhances cooling system efficiency and reliability, trusted by professionals since 1979.

Specifications

ASIN	B000CPI5ZK
Best Sellers Rank	#4,951 in Automotive ( See Top 100 in Automotive ) #32 in Antifreezes & Coolants
Brand Name	Red Line
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (3,197)
Flash Point	149 Degrees Celsius
Global Trade Identification Number	00083522802048
Included Components	Red Line (80204) Water Wetter - Coolant Additives - 12 oz Bottle
Item Form	Liquid
Item Type Name	Antifreezes & Coolants
Item Weight	340 Grams
Liquid Volume	0.34 Liters
Manufacturer	Red Line
Material	Aluminum, cast iron, copper, brass, bronze
Model Number	RED80204
Number of Items	1
Part Interchange Info	80204
Part Number	80204
Recommended Uses For Product	Home
Specific Uses For Product	Temperature
UPC	083522802048 172303062310
Unit Count	11.4968 Fluid Ounces
Warranty Description	Limited Manufacturer

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€ 31.50

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

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