Kiwi Select Shoe Stretch Aerosol 7 Oz
Waterproofing aerosols often contain PFAS. Brand silent on PFAS.
This aerosol shoe stretch uses water-repellent spray formulation typical of products containing PFAS durable water repellents. Kiwi provides no PFAS disclosure or testing.
The better-graded swap
Chamberlain's
Chamberlain's Leather Milk Conditioner and Cleaner Kit
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Propellant and hydrocarbon blend with water-repellent spray formulation
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
Aqua Pure
3M Aqua-Pure AP802B Whole House Filter Housing
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product. See all of them.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product. See all of them.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product. See all of them.
What Kiwi Select Shoe Stretch Aerosol 7 Oz is made of, ingredients and materials
Kiwi Select Shoe Stretch is a propellant-driven aerosol combining hydrocarbon solvents with water-repellent actives designed to soften and stretch leather while adding water resistance. The propellant system (likely isobutane or similar) and volatile organic compound (VOC) blend are typical for this product class. The water-repellent component is the source of the poor PFAS grade, waterproofing aerosols commonly rely on fluorinated compounds, though Kiwi has not disclosed the specific chemistry.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Volatile organic compounds (VOCs) and propellant inhalation
Aerosol propellants (isobutane, n-butane) and hydrocarbon solvents are inhaled during spray application. Acute exposure causes dizziness, headache, and respiratory irritation; chronic occupational exposure is associated with central nervous system effects. Indoor use without ventilation increases risk.
Skin and eye irritation from solvent contact
Hydrocarbon blends in shoe stretchers are dermal and ocular irritants. Direct spray contact or splashing during application can cause chemical burns, redness, and eye damage. The water-repellent additives may potentiate irritation.
Fire and explosion hazard from propellant
Isobutane and butane propellants are flammable. Product labeling typically warns against use near heat, sparks, or open flame. Aerosol cans can rupture if heated or punctured, releasing pressurized, ignitable gas.
PFAS
Water-repellent aerosols commonly use perfluorinated or polyfluorinated compounds to achieve water-resistance on leather. Kiwi's silence on PFAS and the poor safety grade (30/100) strongly suggest fluorinated actives are present. PFAS bioaccumulate and persist in the environment and human tissues.
Source, ATSDR ↗What’s reassuring
Coating adhesion and durability over time
No recalls or widespread complaints on record for Kiwi Select Shoe Stretch adhesion failure or uneven wear. Product performance is standard for the category; durability depends on shoe use and re-application frequency.
The full breakdown
The brand's record and disclosure
Kiwi, a long-established shoe care brand owned by SC Johnson, maintains a basic consumer product safety posture but has not issued public statements on PFAS use or phase-out in its aerosol lines. The brand does not list PFAS-free certification or independent third-party testing on this product. SC Johnson's broader transparency on PFAS is limited; no specific recalls for this aerosol are on record, but the silence on fluorinated content in a water-repellent formulation is a red flag for informed consumers.
How it compares in its category
Shoe stretch aerosols are a narrow category; most competitors (Kiwi, Liquids, Meltonian) use similar hydrocarbon-propellant systems. Few brands disclose PFAS status. Non-aerosol liquid stretchers and silicone-based creams avoid propellant VOCs and are less likely to contain PFAS, but require manual application. For aerosol convenience, Kiwi Select is middle-of-the-road in terms of transparency and hazard profile; no clear low-PFAS alternative exists in the spray category.
If you buy it
Use only outdoors or in well-ventilated spaces to minimize inhalation of propellant and VOCs; do not spray near open flames or ignition sources. Apply in thin, even coats to dry leather and allow 15-20 minutes air-dry time before wearing. Avoid contact with eyes, mouth, and skin; wash hands after use. Store upright in a cool place away from heat. For sensitive individuals or those concerned about PFAS accumulation, consider liquid or cream alternatives as a replacement once this aerosol is depleted.
What we don’t know
- Basis
- Model estimate, 42% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kiwi has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Leather Conditioner
Beeswax Polish
Beeswax Leather Conditioner Restorer & Polish
- Beeswax, oils, mineral waxes
- We found no PFAS statement from the brand
- Mineral oil contamination or refinery residues
4 hazards checked on this product. See all of them.
Griot's Garage
Griot's Leather Care Spray
- Flaxseed oil base, leather conditioning
- We found no PFAS statement from the brand
- Fragrance allergens / undisclosed ingredients
3 hazards checked on this product. See all of them.
Oakwood
Leather Oil Spray
- flaxseed oil
- We found no PFAS statement from the brand
- Oxidative rancidity and microbial contamination
2 hazards checked on this product. See all of them.
More leather conditioner grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.