CarCareTruth Score
Decent.
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Prices may varyHealth score is for adult use as intended, per the manufacturer's SDS. It does not model child ingestion, accidental spill cleanup, or off-label use. See the safety panel below for full hazard classification, and /disclaimer for the full editorial scope.
No Safety Data Sheet on file.
CarCareTruth has not received a Safety Data Sheet from the manufacturer for this product. Hazard classification and PPE cannot be cited. Request an SDS from the manufacturer before use.
This product ranks #3 of 5 in Anti-Fog (Interior Glass).
Last reviewed June 14, 2026
TL;DR A soap-and-glycerin anti-fog formula with a loyal following in the ski and safety-eyewear communities · proven on goggle lenses, but the 1 oz bottle and thin windshield-specific community data make it a marginal fit for daily-driver interior glass. No GHS SDS is on file; Health Score held at 5.0/10. Amazon carries a Prop 65 warning with no identified triggering chemical.
Cat Crap deposits a hydrophilic surfactant film (coconut tallow soap plus glycerin) that spreads water vapor into a transparent layer instead of fog beads. Spray a small amount on the surface, spread with a cloth, buff dry. The 1 oz bottle covers dozens of goggle applications but only two or three full windshield treatments. Community durability data is almost entirely eyewear-focused; windshield-specific data is sparse. Based on the surfactant mechanism and category baseline, expect roughly one to three weeks on interior automotive glass before reapplication.
A good fit for owners who already carry Cat Crap for ski goggles and want to extend it to their car's interior glass. Skip it if you want a purpose-built automotive anti-fog · an 8·12 oz windshield spray has a better evidence base and better cost-per-use. Skip it if you have a heated windshield or heads-up display; the defroster solves the problem without a product, and most anti-fog treatments are unvalidated for HUD film.
No GHS SDS has been located as of 2026-05-19, so H-codes and PPE requirements cannot be confirmed. The disclosed ingredients (coconut tallow soap, glycerin, water) are consistent with mild soap chemistry that typically falls below GHS thresholds · but consistent-with is not the same as confirmed. As a pump-spray used inside a closed cabin, open windows during application as a routine precaution. Amazon carries a Prop 65 warning; without SDS §15 the triggering chemical is unidentified. Environmental footprint is small: a few milliliters per leave-on interior application.
No. The paste (the original product) comes in a small round tub and is rubbed on with a fingertip or cloth. The spray (ASIN B002ZNA488, EK SKU 123625) is a 1 oz pump bottle. Both use the same coconut-tallow-soap-and-glycerin formula, but the application method differs. The product listing mixes paste and spray copy · the structured product attributes (Item Form: Spray, Contains Liquid Contents: Yes) confirm this specific ASIN is the pump-spray variant.
The product was designed for ski goggles and safety eyewear, not automotive interior glass. Community durability data for windshield use is thin. Expect performance similar to other surfactant-based anti-fog sprays in the category · roughly one to three weeks before reapplication · though results on a larger, more thermally stressed windshield may be shorter than on a small goggle lens.
Amazon shows the warning because the seller registered the product as one that may contain chemicals known to California to cause cancer, birth defects, or reproductive harm. With no manufacturer SDS available, the triggering chemical cannot be identified · it could be a packaging component, a label additive, a precautionary listing, or an undisclosed minor ingredient. The warning is a fact about the listing, not a finding about the formula.
Tint compatibility is not documented. The disclosed formula (water-based soap and glycerin with no co-solvent) is unlikely to attack tint adhesive, but EK USA does not explicitly confirm automotive tint compatibility. The product's marketing addresses optical surfaces (goggle lenses, eyeglasses, safety glasses) · not automotive aftermarket film.
The 5.0/10 Health Score is the no-SDS floor, not a finding about the formula. No manufacturer Safety Data Sheet has been located for this product. Without a GHS SDS on file, hazard codes, VOC, pH, and flash point cannot be verified · and the safety column is not displayed. The disclosed ingredients (coconut tallow soap, glycerin, water) are consistent with a mild, low-hazard chemistry, but 'consistent with' is not the same as 'confirmed.' The score will be revised upward if a GHS SDS is sourced.
Marketing copy from EK USA, via Amazon. Not editorial.
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