PEAK PWN0H3 -20°F DE-ICER Windshield Washer Fluid
Priced as of May 21, 2026
4.7(939 ratings)Subscribe & Save: $16.01 (5% off)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
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Prices may varySerious hazard — read before use
The manufacturer's Safety Data Sheet classifies this product with one or more GHS Category 1 health hazards — the most severe tier. The wording below is taken directly from the SDS as required by OSHA's Hazard Communication Standard.
- H311 “Toxic in contact with skin.”
Toxic absorbed through skin. Gloves and long sleeves recommended; rinse splashes immediately.
If swallowed, inhaled, or splashed in eyes:
Do not induce vomiting. Call Poison Control immediately at 1-800-222-1222 (US, 24/7, free). Have the product container with you.
Store in original container, locked, out of reach of children and pets.
About this product's hazards. This product's Safety Data Sheet uses signal word danger. Read the manufacturer's SDS and follow all safety instructions before use. CarCareTruth ratings translate SDS data — they do not replace the SDS or substitute for a hazard assessment specific to your task.
CarCareTruth's Analysis
Last reviewed May 21, 2026
TL;DR Rated to -20°F with community-confirmed cleaning performance at 4.7 stars. Health score is 1.0/10: this is a DANGER-class methanol formula. Methanol-free alternatives score significantly higher on health and are worth considering for households with children or pets.
What it is and how it performs
PEAK's PWN0H3 is a ready-to-use blue all-season formula rated to -20°F, confirmed by SDS freeze-point data. It handles winter road salt and grime at a commodity price point, no dilution needed, in a standard gallon jug. At 4.7 stars across 939 Amazon reviews, cleaning and streak-free performance are consistent with the label claims. Available in the PEAK lineup at multiple temperature ratings; the -20°F version covers most US cold-weather driving without deep-freeze protection.
Who should buy this — and who should skip it
Best fit for cold-climate daily drivers in most of the US who want reliable -20°F protection at a commodity price. Not for households with chemistry concerns; the DANGER-class formula carries real handling hazards. Not for sale in California, Texas, or Maricopa County, AZ.
Safety and environmental impact
SDS carries DANGER: H302 (harmful if swallowed), H311 (toxic in contact with skin), H332 (harmful if inhaled), and H370 (optic nerve damage). Proposition 65 applies; methanol is listed as a developmental toxicant. SDS §8 specifies safety glasses and gloves; pour-fill outdoors is the primary exposure point. Drain-destined via stormwater runoff; no aquatic H-codes in SDS §12.
Frequently asked questions
What temperature does PEAK PWN0H3 protect down to?▾
The product label and ASIN title state -20°F protection. SDS Section 9 confirms a freeze point of -28.9°C (-20°F). This is a solid mid-tier freeze rating for cold-weather US driving — adequate for most of the continental US but not for extreme northern climates that see temperatures below -20°F regularly.
Does PEAK PWN0H3 contain methanol?▾
Yes. SDS §3 (Old World Industries, 01/11/2018) lists methanol (CAS 67-56-1) at up to 33% by weight as the primary active ingredient. Methanol is the standard chemistry for a winter de-icer washer fluid at this temperature rating. The DANGER signal word and Proposition 65 warning both stem from the methanol content.
Is PEAK PWN0H3 available in California?▾
Not for purchase as a consumer product in California due to CARB VOC regulations that restrict methanol-based consumer products. The product carries a Proposition 65 warning for methanol as a developmental toxicant. California residents should look for a methanol-free or ethanol-based washer fluid with CARB compliance.
What should I do if PEAK PWN0H3 is ingested?▾
Methanol ingestion requires immediate medical attention. The SDS classifies this product as H302 (harmful if swallowed) and H370 (specific organ toxicity — optic nerve damage). Contact Poison Control (1-800-222-1222 in the US) or emergency services. Do not induce vomiting. Keep out of reach of children and pets.
Is there a concentrate version of PEAK PWN0H3?▾
No. The PWN0H3 is a ready-to-use (RTU) formula — no dilution is needed. PEAK offers separate concentrate products in their lineup. The PWN0H3 is designed to pour directly into the washer reservoir as-shipped.
From the manufacturer
Marketing copy from PEAK, via Amazon. Not editorial.
- •Ready-to-use formula
- •Keeps your windshield clean
- •Protects to -20 Degree F
- •brush applicator for larger scratches and chips.
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Manufacturer videos
Manufacturer specifications
- Package Dimensions
- 11.89 x 6.1 x 6.06 inches; 8.25 Pounds
- Item model number
- PWN0G3
- Date First Available
- February 12, 2013
- Manufacturer
- Peak
- ASIN
- B001VXZTZG
- Best Sellers Rank
- See Top 100 in Automotive
- Item Form
- Liquid
- Specific Uses For Product
- Windshield
- Contains Liquid Contents?
- Yes
- Item Volume
- 1 Gallons
- Unit Count
- 128.0 Fluid Ounces
- Number of Items
- 1
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