Thomastik-Infeld · Guitar Strings
Thomastik-Infeld SL110 Blues Sliders Electric Guitar Strings
Lower concern; traditional steel strings with no known PFAS applications in this category.
Thomastik-Infeld SL110 Blues Sliders are steel roundwound guitar strings with no documented PFAS coatings or treatments in public materials. The brand makes no PFAS claims and no third-party testing is publicly available. Guitar strings are not a typical product category for PFAS additives, making this lower concern by default.
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Steel roundwound electric guitar strings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Thomastik-Infeld SL110 Blues Sliders are steel roundwound electric guitar strings, meaning a steel core is wrapped tightly with steel wire to create the playing surface. The steel composition is the industry standard for electric guitars and has no known leaching or off-gassing risks under normal playing conditions. These strings are not coated with polymers or exotic finishes that introduce chemical exposure during use.
The brand's record and disclosure
Thomastik-Infeld is an Austrian string manufacturer with a century-plus heritage and no documented recalls or safety complaints in public health databases. The company does not publish detailed material certifications or independent test reports, which is typical for the string category but limits verification of trace contaminant levels. No environmental or labor controversies are on record for this brand.
How it compares in its category
Steel roundwound strings from major brands (D'Addario, Ernie Ball, GHS, Thomastik) are chemically equivalent; differences are in winding tightness, core gauge, and nickel alloy composition rather than hazard profile. Thomastik's Blues Sliders are positioned as premium strings with tighter wrapping, which may reduce breakage but does not alter chemical safety relative to mass-market alternatives. Coated strings (Elixir, etc.) introduce polymer layers that slightly increase complexity but remain below any recognized threshold for concern.
If you buy it
Change strings every 1-3 months depending on playing frequency to avoid corrosion and loss of tonal clarity, not due to chemical degradation. Store in a cool, dry place to prevent rust on exposed windings. Wash hands after playing if you have sensitive skin, as nickel in string alloys can cause contact dermatitis in susceptible individuals. No special disposal protocols are required beyond standard metal recycling.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Nickel contact allergy
Steel string alloys typically contain 8-12% nickel to create brightness and durability. Individuals with nickel sensitivity may experience skin irritation on fingertips and hands after extended playing; this is a well-known phenomenon in guitar players but not a manufacturing defect.
Heavy metals in core or wrap
Thomastik-Infeld uses standard steel alloys with no documented cadmium, lead, or arsenic contamination. Independent test results are not publicly available, but the string category does not present a known route of heavy metal exposure.
Corrosion byproducts and rust inhalation
Corroded steel strings can shed fine rust particles during playing, which may be inhaled in trace amounts. Risk is mitigated by regular string replacement and is not specific to this brand.
Coating or finish contamination
SL110 strings are uncoated roundwounds with no applied polymer or chemical treatments. No finish-related toxins or off-gassing are documented for this product line.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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 Guitar Strings
Martin
Retro Acoustic Guitar Strings
Phosphor bronze, stainless steel, nylon wound
Lower concern, acoustic guitar strings typically use established metals and nylon without water-repellent coating or nonstick coatings.
✓Bare metal or glass, no coating at all
Acoustic360
Ernie Ball Everlast Acoustic Guitar Strings
Phosphor bronze/stainless steel wound on steel core
Lower PFAS concern, acoustic guitar strings use standard metal materials with no known fluorochemical treatments.
✓Bare metal or glass, no coating at all
Dean Markley
Electric Guitar Strings
Steel alloy strings (nickel-plated or stainless steel core)
Lower PFAS concern, steel strings lack typical PFAS applications, but no brand disclosure exists.
✓Bare metal or glass, no coating at all
More guitar strings 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.