40/ 100
F

PFAS score

RUST-OLEUM LeakSeal Spray Coating

Rust-Oleum · Shoe Waterproofing Sprays

RUST-OLEUM LeakSeal Spray Coating

F · High PFAS

Skip or contact manufacturer, waterproof coatings often contain PFAS, and Rust-Oleum provides no transparency.

LeakSeal is a waterproof spray coating designed to seal leaks and protect surfaces. Rust-Oleum makes no public disclosure about PFAS content or use.

The safe swap

Jason Markk Starter Shoe Care Kit

Jason Markk

Jason Markk Starter Shoe Care Kit

85/100 safety

B

Still want this one anyway? Check the price on Amazon. We’d swap it.

Material

Acrylic-based spray coating (waterproof sealant)

Brand disclosure

Brand is silent on PFAS

Lab data

No public lab test

Why this grade

Waterproof / stain-resistant treatment

water-repellent coating treatments have historically used PFAS.

Hurts the grade

Category baseline

other is a category where PFAS exposure is more common.

Hurts the grade

No PFAS disclosure

No public statement about PFAS in this product.

Hurts the grade

What we don’t know

This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% confidence. It is not a lab result.

No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.

The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.

Formulations and coatings change between production runs. Always check the current label before buying.

Safer alternatives in Shoe Waterproofing Sprays

Jason Markk Starter Shoe Care Kit

Jason Markk

Starter Shoe Care Kit

Bristles, microfiber cloth, cleaning solution (soap-based formulation)

B
D
PFASAll
B · Low PFAS3 flags

Lower PFAS concern, basic cleaning supplies with no known PFAS inputs, but brand is silent on sourcing.

Brand says nothing about PFAS

Jason Markk Essential Kit

Jason Markk

Essential Kit

Surfactant-based cleaning solution, brush bristles (synthetic or natural)

B
D
PFASAll
B · Low PFAS4 flags

Lower-concern category; sneaker cleaning kit unlikely to contain PFAS, but brand offers no transparency.

Brand says nothing about PFAS

Jason Markk Care Kit

Jason Markk

Care Kit

Cleaning solution, brush, cloth (typical sneaker care kit)

B
C
PFASAll
B · Low PFAS3 flags

Lower-concern product category; no known PFAS risk, but brand discloses nothing.

Brand says nothing about PFAS

More shoe waterproofing sprays 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.