Kirkland Signature · Golf Balls & Equipment
Kirkland Signature 3-Piece Urethane Cover Golf Ball
Ball coatings often use water-repellent coating agents, brand provides no disclosure.
Urethane golf balls typically receive water-resistant treatments that may include PFAS, though confirmation is unavailable. No public testing or brand information exists to verify this ball's coating composition.
The better-graded swap
OnCore
OnCore Mix used golf balls - Foundgolfballs.com 5A/4A Mix (10 Dozen)
85/100 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
Urethane cover, unknown water-resistant coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Kirkland Signature 3-Piece Cover Golf Ball is made of, ingredients and materials
This ball uses a urethane elastomer cover, which is a durable synthetic polymer standard in mid-to-premium golf balls. Urethane itself has no established acute toxicity hazard during normal use (hitting, handling). The concern here is the water-resistant (water-repellent coating) coating applied to the surface, these coatings historically used Teflon-type coating or fluorinated compounds to repel water, though modern formulations sometimes substitute other durable water repellents. No public data specifies which coating type Kirkland uses.
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.
PFAS
Golf ball water-repellent coating coatings historically contain fluorinated compounds; this Kirkland product provides no specification. Skin contact during play poses minimal exposure, but coating composition remains undisclosed.
Source, ATSDR ↗What’s reassuring
Urethane polymer degradation and volatiles
Urethane covers are stable under normal use and storage. No established health hazard from handling or playing with intact urethane golf balls at room temperature.
Heavy metals
No recalls or public warnings exist for Kirkland or comparable urethane golf balls related to lead, cadmium, or other metals in colorants. Standard manufacturing controls in this category appear adequate.
Source, FDA ↗Microplastic or particulate shedding
Urethane covers do not shed microplastics during normal play or handling. Degradation over months produces surface cracking, not particle release into the body.
How is this PFAS grade calculated?
The brand's record and disclosure
Kirkland Signature is Costco's private label with no published chemical safety certifications or third-party testing transparency for sporting goods. Costco has not issued statements on PFAS use in golf balls or other recreational products. PGA Tour branding suggests licensing but does not indicate independent material verification. The silent stance on coating composition means buyers have no manufacturer-level assurance of what's on the surface.
How it compares in its category
Urethane covers dominate the mid-market golf ball space and are chemically comparable across brands (Titleist, Callaway, Bridgestone). Most major manufacturers do not publicly disclose water-repellent coating chemistry. Premium brands occasionally pursue lower-fluorine or fluorine-free water resistance, but Kirkland provides no such distinction. In terms of chemical hazard profile, this product sits in the typical, largely unvetted middle of the market.
If you buy it
Golf balls pose no chemical exposure during normal use (gripping, striking, retrieving from water). Avoid extended skin contact in warm conditions if concerned about surface coating leaching, though risk is negligible during typical play. Store in a cool, dry place; do not expose to heat (car trunks in summer) as urethane can degrade and may release minor volatiles. Replace when visible cracks or surface degradation appear, typically after 3-6 months of regular play.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kirkland Signature has made none
Formulations change between production runs, so check the current label. How we grade.
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Find an alternative on AmazonMore golf balls & equipment 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.