Lubes/Cleaners

Tri-Flow Superior Lubricant is a light viscosity lube that allows for deep penetration into hard to reach moving parts. - Ideal for all conditions - wet, dry, road and trail - High grade petroleum oils provide optimum lubrication under extreme temperatures (-60 to 475F) and humidity

Clean bikes run smoother and perform better. Finish Line's Premium Bike Care Value Pack is a 3-pack of their best-selling products: Multi Bike Degreaser, Dry Teflon Bike Lube, and Super Bike Wash Concentrate. These three 4-ounce bottles make it easier than ever to keep your ride in premium shape.

DOT 5.1 brake fluid is compatible with all SRAM and Avid hydraulic disc brakes - Brake Fluid Type: DOT 5.1 - Bottle Size (Brake Fluid): 4 oz - Application (Brake Fluid): Disc Brakes

Keep your chain running smoothly with Park's Synthetic-Blend Chain Lube. It uses PTFE and a proprietary blend of oils to penetrate, reduce friction, prolong chain life, displace moisture and protect chains from rust and corrosion. Plus, it works great on cables, spokes, and derailleur and brake pivots, too.

- “New Bike in a Can” - Restore that factory shine - SC1 high gloss coating is specifically formulated to protect and beautify multiple surfaces including plastic, vinyl, rubber and carbon fiber - Water-resistant formulation is safe for use on gloss or matte finishes and makes the clean-up process easier by forming a durable coating that repels mud, dirt and debris

Finish Line's Ceramic Wet Lubricant provides outstanding protection for your drivetrain in even the nastiest conditions. Its ceramic bonding technology allows you to greatly extend your re-lubing intervals so you can spend more time riding and less time on routine maintenance. In fact, every time you apply the lube, it builds on the ceramic coating and the result is a chain so slippery even dirt has a hard time sticking! Think efficient. Think quiet. Think Finish Line!

- Premium red formula all-purpose bicycle grease

A dirty drivetrain causes poor shifting and unnecessary wear to expensive parts. The Chain Gang contains everything needed to quickly and easily clean the chain, freewheel cogs, and chainrings. The Chain Gang includes: - CM-5.3 Cyclone Chain Scrubber - GSC-1 GearClean Brush - 8 oz. bottle of Bio ChainBrite The CG-2.4 works on nearly any bike, including multi-speed, single-speed, and e-bikes.

Wet Lube is typically recommended for extreme conditions. Formulated with high viscosity synthetic oils, water repelling polymers, and advanced anti-wear additives. Wet Lube is Finish Line's strongest, longest lasting and most water resistant lubricant. Wet Lube goes on wet, and stays wet, to provide maximum drivetrain smoothness, extremely quiet rides, and ultimate rust protection in the harshest of environments. If you use Wet Lube for riding off-road or in dry climates, be sure to wipe the excess from parts to minimize the attraction of dirt and grime. Since 1994, when Wet Lube was first introduced, it has become the preferred lubricant for many professional on and off-road teams around the world. Use Wet Lube when you ride hard and long. Proven performance for 100-plus mile rides, muddy off-road conditions, long rainy commutes, and foggy salt-air coastal climates. A heavier, wet-style lubricant that requires a little more attention to drivetrain cleanliness, but delivers the ultimate in lubricity and protection.

Park's SuperGrip Carbon Assembly Compound is a combination of grease and tiny particles and is ideal for lubricating, protecting and tightening carbon components, like seatposts, handlebars and stems. SuperGrip solves the problem of carbon parts moving and slipping, which can happen if they are not lubed, or you apply standard grease or lube to them. It also works well with aluminum and steel components.

- A biodegradable degreaser that cuts through the toughest grime - Strong enough for the metal parts, Yet safe enough to clean parts with rubber o-rings and seals, urethane elastomers, and painted surfaces - Exceeds all federal V.O.C. and California carbon regulations - Law prohibits ORM-D materials from shipping by air

ProGold Prolink Cable Luber .25oz ProLink lubricant in a convenient, refillable applicator. - Lube and clean cables - on the bike - in minutes - Restores old or corroded cables - Year-round protection against rust and corrosion - Compact and easy to use - No product waste - Non-staining

White Lightning's Crystal Grease is so pure and innovative, it's clear. Premium base oils allow this 100% waterproof grease to provide smooth, long-lasting lubrication and the clear color won't stain or hide damage and contaminants. And, you'll feel good knowing that it's biodegradable, non-toxic, and won't harm carbon, seals and other crucial components.

Clean Ride is White Lightning's legendary self-cleaning lube. By creating a dry, waxy film this lube doesn't attract dirt and grime like traditional oil based lubricants. Should dirt work its way onto your chain or gears Clean Ride's self-cleaning action is activated causing small particles of wax to break free, taking the riff-raff with it. Not only will you spend less time cleaning your chain, you'll enhance the lifespan of your drivetrain, too!

- Goes on wet to penetrate rollers and side plates, then sets up to a soft, pliable wax - Chain is encased in a waterproof layer, shielded from dirt and grime - Special low melt point wax replenishes drivetrain by slow-Feeding clean lube from the inside layers outward, significantly reducing abrasive wear and eliminating corrosion - Smooth, quiet, trouble-free operation in all conditions for long lasting protection

Chill Zone™ is arguably the industry's most advanced rust-busting penetrating lubricant. It simply works like magic! Before giving up on a frozen crank bolt, a rusted derailleur spring, a seized seat post, or discarding your rusted chain, give Chill Zone™ a shot. Bike parts that normally need to be replaced can be reconditioned to ride another day. A special refrigerant propellant freezes metal to as low as -50°F/-45°C. This causes contraction of the metal and creates micro-cracks in the corrosion and galvanically fused metal parts. A penetrating release agent then breaks down and flushes out the rust. With Chill Zone, most seized parts regain full functionality.

- Intended for hassle-free infrequent usage, maintains its performance over long periods of time without the need for bleeding or flushing the lines.

- Quickly removes grease, oil, and other contaminants from electrical components - Propellant provides maximum spray pressure - Allow hot surfaces to cool before applying - Quick drying, leaves no residue - Safe for most plastics - Citrus scented - VOC compliant

- Cleans and polishes painted, anodized, and plastic surfaces - Loosens dirt and grime for easy cleaning - Sprays on and wipes away quickly and easily - Carnauba wax creates a long lasting protective shine

• High gloss formula provides the ultimate shine on all surfaces: metal, carbon fiber, plastic, rubber and vinyl. • Polishes and protects in one easy step • Use on bicycles, fitness equipment, motorcycles, watercraft, ATVs and more. • Slick film helps prevent dirt build-up on frame and parts.

• Penetrating all purpose lubricant with PTFE • Repels moisture and prevents rust and corrosion • Use on chains, cables and pivot points • Loosens rusted and corroded nuts and bolts • Ideal for all conditions wet, dry, road and trail • 12 ounces

 An instant bicycle suspension performance booster. WPL ForkBoost lubricates and cleans bicycle suspension seals to eliminate stiction, remove dirt, and lengthen lifetime of the seal. Apply ForkBoost externally to the dust seals of bike suspension by coating the stanchion, pumping the suspension, and wiping away extracted dirt. ForkBoost is fully compatible with rubber and rubber derivatives, causing no risk of damage to the seals, seal swelling or cracking. Use ForkBoost internally during fork rebuilds, to soak foam seals and cut grease to specified thickness - Premium bio-based formula made with natural ingredients - Biodegradable, non-toxic, PTFE-Free formula - Cleans and lubricants bike suspension seals - Removes unwanted dirt and contaminants from suspension seals - Apply externally to dust seals to lengthen seal lifetime

- Mineral Oil for Campagnolo hydraulic disc brakes

Aqua Proof Paste is the magic goop for installing bottom brackets and keeping them quiet. In the Kogel office, it's known as 'Shut up Grease'. Aqua Proof was developed by Morgan Blue from Belgium for the offshore industry. It's saltwater resistant, does not degrade over time, and is a long-time favorite of the UCI world tour mechanics. It works on any pressed or threaded surface to avoid corrosion. You'll find yourself using it for a lot more than just installing bottom brackets. The 5ml size is for a single bottom bracket installation, the 200ml jar will last a long time, even for professional use. - Recommended for all bottom-bracket installations - Also works on thread and headset installation - 5ml syringe is enough for a single installation - 200ml jar for shop use

Heavy-duty, non-flammable degreaser specifically designed to remove lube, dirt, mud, sand, and other contaminants from bike drivetrains. Unique and proprietary formulation thoroughly cleans all bike drivetrains without harming rubber o-rings or metal surfaces. Non-toxic, non-flammable, and eco-friendly formulation contains no VOCs, harmful acids, CFC’s, or solvents and is 50 state VOC compliant. Makes a great all-purpose wash when diluted 10:1 with water. For use as a bicycle drivetrain degreaser. Safe for incidental contact with other bicycle components. Can be used as an all-purpose bike wash when diluted 10:1 with water. Features - Specially designed for bike drivetrains. - Professional strength formulation. - Safe on o-rings and metal surfaces. - 100% biodegradable. - Contains no VOC's, harmful acids, CFC's or solvents. - Non-flammable.

Our Classic ORIGINAL chain lube is a liquid plastic and through polymerization forms long-lasting plating on all chain surfaces. - “Riding in” forms an extremely low-friction plating. - Plating bonds to chain; can’t be washed off! - Components stay cleaner, last longer, and run quieter. - Extremely durable, outlasts all other chain lubes! - Environmentally sensitive and saves money. - To be applied sparingly unlike many other lubes. Classic Lite and Original Bicycle Chain Lube (BCL) differ only in their concentration. Original BCL is more concentrated for exceptional durability under the most challenging conditions. The two formulas are compatible and may be used interchangeably. We recommend the Original Bicycle Chain Lube for mountain bikes, cyclo-cross, and more extreme conditions. You can confidently use Dumonde Tech’s Bicycle Chain Lube on all cables, pivots points, and seals. Safe on plastic, rubber, all seal materials. The product is designed to not harm your components. Eco-friendly and environmentally sensitive, our products are engineered to perform with minimal “carbon footprint” by not washing off in water, to use sparingly, lasts longer between applications, and your drive train lasts longer. Very good performer in the extreme cold conditions..

- The factory standard grease for leading bike and bearing manufacturers that exceeds the unique and demanding requirements of bicycle bearings - Prevents wear and distortion in headsets, hubs, and bottom brackets

Park's PolyLube is specifically formulated to protect bearing components. Its Polyurea grease has extremely high shear strength to protect bottom brackets, headsets, pedals and hubs. Use it on threads, seatposts, stems and cables, too. It's also safe for fork seals, and repels water.

Bio ChainBrite Bicycle Chain and Component Cleaning Fluid is a 100% biodegradable, natural, plant-based degreaser formulated for use in Park's CM-5.2 Cyclone Chain Scrubber or as a general purpose degreaser. It won't harm alloy, plastic, or rubber parts. Use CB-4 full strength, do not dilute with water. Cover parts in solvent and scrub using a brush. 16-ounce bottle

- Formulated with nano-ceramic boron nitride and surface bonding resins to create an ultra-slick, protective dry film - This film does not absorb abrasive contaminants, which reduces friction, prevents annoying squeaks and premature wear, and repels moisture to prevents corrosion - Sprays on to fully and evenly coat all frictional surfaces - Engineered to ensure fast engagements and smooth releases every time

Shock Oil is a semi-synthetic formulation that combines the best of available oils and additives for a super suspension oil. It's fully compatible with all systems and internal components, seals and O-rings. Its viscosity stays constant as the temperature changes, so your shock feels the same whether you're roasting or freezing!

The great thing about wax-type lubes is that the shedding action of wax keeps parts cleaner during most riding conditions. Finish Line's Wax Lubricant is a unique formulation that features DuPont's Krytox, a highly advanced, thermally stable lubricant. Its specialized paraffin waxes set up dry and hard to repel grit and grime so your drivetrain runs silky-smooth and stays clean.

Finish Line's Mineral Oil Brake Fluid is high quality to provide maximum fluid life and braking power. It features a super-low viscosity to yield superior lever response and pad retraction. Plus, it won't foam up even on long, challenging downhills.

Whether you're fine-tuning your new full-suspension rig or tuning a fork you've ridden for years, Finish Line's Max Suspension Spray is a pro-grade stiction-fighting stanchion lubricant that maximizes the performance of your suspension. It smooths suspensions that have become dry or dirty and restores full travel and eliminates noise, too. Use Max before rides to ensure maximum responsiveness over the smallest of bumps, and the longest possible travel over extreme terrain. And, use Max to break in new forks or bring old ones back to life. It also conditions and protects rubber seals and O-rings and improves the surface slip of coated stanchions. - Helps suspension forks run more smoothly and quietly - Made with polysiloxane and advanced fluoropolymers

Recommended by DT Swiss for lubrication of Ratchet mechanisms found in DT's Ratchet, Ratchet EXP and Ratchet LN hubs

Finish Line Citrus Degreaser. Super strong and fast. Cuts through the toughest of carbonized grit, grease, and grime. Low surface tension for thorough penetration into all areas. 100% active, biodegradable and nontoxic.

Reach for Finish Line's Citrus Degreaser when you've got tough grit and grime to cut through. Your parts clean up fast and then rinse residue-free with water. This degreaser is concentrated and water soluble so you can dilute it with up to 25 parts water for less difficult jobs. It's 100% biodegradable and completely non-toxic, too.

- Powerful cleaning action on dirt and oil - Eco-friendly, non-toxic and biodegradable formula - Safe for paint, plastic, rubber, alloys, and carbon fiber - Additives protect aluminum, magnesium, and other alloys

Tri-Flow Synthetic Grease is specially formulated to lubricate any surface that slides, glides, rolls, twists, turns or spins. - Non-melting, waterproof formula designed to seal out water and contaminates and prevent rust and corrosion under extreme temperatures - Fully compatible with most rubbers and plastics

- Makes braking and shifting super smooth by reducing the drag in cable housings - Law prohibits ORM-D materials from shipping by air

Holy Cow is the latest in the Rock N' Roll Lubrication's line up of chain lubes. Holy Cow is not flammable and is a very settled wet lube that is as clean or cleaner than most dry lubes. Holy Cow preforms fantastic, like the other Rock N' Roll chain lubes. However, being a little bit of a wet-style chain lube, what little dirt or grit that does get on the chain can be wiped away quickly and easily with the chain looking great again. For all you riders that like to ride with a wet lube but could live better without all the dirt and grit of a wet lube, Holy Cow is just for you.

Our Classic Freehub Grease is specifically designed for all freehubs that require a lightweight grease. These style hubs we like to call the more mechanical hubs. Unlike the simpler, fewer parts of the Pawl style hubs. Dumonde Tech Freehub Grease performs in a broad temperature range from the heat of summer to the frigid temperatures of the north. "Pour Point" of Freehub Grease is -30 degrees. Follow the manufacturer's specification for the volume required in your freehub body to experience the superior performance of Dumonde Tech's Freehub Grease. Our Freehub Grease is Exclusively used by: Industry 9 "Legacy", "Hydra" and "101" hubs and Stan's NoTubes, Hermes Sport, and Hawk Racing. Used, endorsed and/or recommended by: Crank Brothers, Boyd Cycling, Ritchey Design and Paul Components. Campagnolo North America recommends our Freehub Grease as an alternative to their lb-100 Grease as it is no longer available in North America. Our Freehub Grease is a proven replacement for any hub or wheel company's grease.

Finish Line's Premium Grease With Teflon is a race-proven lubricant formulated for the unique demands of bicycle bearings. It's exceptionally strong and thick, it doesn't separate and it repels water even when submerged. Rated "5 Chainrings, Exceptional Grease" by Bicycling Magazine, it's very slick and very tough and lasts as much as 5 times longer than petroleum grease.

Superior, all-purpose penetrating lube that displaces water and provides excellent rust and corrosion protection. Unique and proprietary formulation forms a durable film that provides protection against both wear and corrosion. MPPL is the perfect choice for anywhere that a penetrating or multi-purpose lubricant is needed, whether on equipment in the garage, or hinges and locks in the house. For use wherever rusted or corroded parts need freeing, or as a light lubricant. Features: - Prevents rust, corrosion, and wear. - Durable film keeps protecting long after initial application. - Will not harm rubber, plastic, or painted surfaces. - Suitable for use on O, X, and Z-rings. - Great for lubing pedals, shifters, and derailleurs. - Safe on most materials.

Maxima Plush Dynamic is an advanced specialty fluid formulated for high-performance suspension systems. Formulated and tested with OEM engineers and designed for use in lower fork legs and multiple other non-damper components. Surface active technology reduces static and dynamic friction and considerably lowers the force needed for easy breakaway, providing smooth action throughout the entire range of travel. Contains special seal conditioners for extended seal life. Ultra-clean detergents keep the system clean and off long-life, trouble-free operation. For all lower fork legs and other non-damper suspension components, including All Mountain, XC, Gravel, Downhill, Enduro, and Freeride. Also approved for use in some dropper seat post designs. NOTE: Rockshox will be listing Plush Dynamic as the lower lube to use in all MY23 + beyond forks. Dynamic Light is a direct replacement for 0w30 in all forks specifying the use of Rockshox 0w30. Features: - High-performance lube for lower fork legs. - Dynamic Lube activates on loaded bushings and seals. - Reduces static (stiction) and dynamic (running) friction. - Proprietary additive system minimizes wear and keeps the system clean. - Long-life fluid extends the time between rebuilds.

Keep your brakes performing at their best with Avid's DOT 5.1 Brake Fluid. They're compatible with all Avid disc brake seals. You'll get a 4-ounce bottle of fluid.

Maxima Plush Dynamic is an advanced specialty fluid formulated for high-performance suspension systems. Formulated and tested with OEM engineers and designed for use in lower fork legs and multiple other non-damper components. Surface active technology reduces static and dynamic friction and considerably lowers the force needed for easy breakaway, providing smooth action throughout the entire range of travel. Contains special seal conditioners for extended seal life. Ultra-clean detergents keep the system clean and off long-life, trouble-free operation. For all lower fork legs and other non-damper suspension components, including All Mountain, XC, Gravel, Downhill, Enduro, and Freeride. Also approved for use in some dropper seat post designs. NOTE: Rockshox will be listing Plush Dynamic as the lower lube to use in all MY23 + beyond forks. Dynamic Light is a direct replacement for 0w30 in all forks specifying the use of Rockshox 0w30. Features - High-performance lube for lower fork legs. - Dynamic Lube activates on loaded bushings and seals. - Reduces static (stiction) and dynamic (running) friction. - Proprietary additive system minimizes wear and keeps the system clean. - Long-life fluid extends the time between rebuilds.

The use of cutting oil or fluid is extremely important when performing any cutting, tapping, facing or reaming operation and Park's Cutting Fluid is a high quality, environmentally safe cutting fluid that extends tool life and makes any frame prep job easier and safer. CF-2 can effectively be used on all metals.

Threadlockers lock threaded assemblies and keep them from loosening. Notice: Park Tool AP-1 Adhesive Primer must be used to prep all components, fasteners and carbon fiber surfaces prior to application of Park Tool threadlockers or retaining compound. Failure to do so could result in permanently bonded parts.

• RockShox Dynamic Seal Grease (PTFE) • Recommended for rear shock service

High-performance brake and clutch fluid designed to lubricate and protect critical brake system componentry while providing reliable stopping power. Anti-vapor lock formulation maintains responsiveness and performance by fighting both water contamination and vaporization. Advanced chemistry resists corrosion, and oxidation and is compatible with SBR, EPDM, and natural rubbers. Exceeds the requirements of US FMVSS 116 DOT 5.1, DOT 3 & DOT 4, SAE J1703, SAE J1704, and ISO 4925 (Classes 3, 4 and 5.1). For use in all hydraulic clutch systems and all brake systems specifying DOT 5.1 brake fluids. Do not use in DOT 5 silicone brake systems or mix with silicone-based fluids. Features: - For use in all vehicles specifying DOT 5.1 brake fluid. - Durable and reliable stopping power. - Anti-vapor lock formulation maintains a responsive lever and pedal feel. - Resists corrosion, oxidation, and boil-off. - Mixes with other DOT 3, DOT 4, and DOT 5.1 brake fluids. - Exceeds US FMVSS 116 DOT 5.1, DOT 3 & DOT 4, SAE J1703, J1704 and ISO 4925 (Classes 3, 4 and 5.1).

Finish Line's Fiber Grip Assembly Gel is specially designed to create friction and reduce slippage between clamped carbon fiber surfaces. It eliminates the need to over tighten clamps to achieve secure connections. Plus, it's been tested and approved by leading carbon fiber component manufacturers.

- High performance Lithium complex grease that excels in a multitude of conditions, from light duty chassis applications to extreme conditions such as wheel bearings - Formulated with a high dropping point and a robust antioxidant system, the NLGI Grade 2 grease remains stable and effective at extreme temperatures - Lithium complex thickener and high-quality base oils combine with an advanced additive package to ensure excellent protection against wear, water washout, corrosion and oxidation

Green Fizz's biodegradable solvent-free formula can be safely used on all parts and materials, including carbon fiber, without washing away grease and lubricants or damaging delicate parts. - Advanced plant-derived surfactants quickly remove tough dirt and grime from the whole bike - Use on the whole bike without risk of damage or washing away grease/lube from critical parts - Safe, biodegradeable, phosphate-free, solvent-free, plant-derived, and zero-VOC - Can be used with or without water

- Biodegradable, non-toxic all-purpose cleaner - Fast-Acting cleaning agents lift away dirt while scrubbing grime and oil deposits - Specially engineered surfactants lower surface tension allowing better penetration and wetting of soils - Tough on dirt, yet gentle enough to use on delicate surfaces including paint, plastic, chrome, anodized finishes, rubber, carbon fiber, aluminum and magnesium - User friendly formula cleanly washes from the surface - Contains no harmful acids, CFC's or solvents.

Finish Line Showroom Polish is made with Teflon fluoropolymer and uses DuPont Teflon Surface Protector technology. Provides a brilliant shine plus long term protection on all surfaces of a bicycle. 100% safe for all plastics, rubbers and carbon fiber parts.

Finish Line's Chill Zone works like magic to loosen and free rusted parts! Before discarding your rusted chain or giving up on a frozen crank bolt, a sticky derailleur, or a seized seatpost, give Chill Zone a shot. Bike parts that normally need to be replaced can be reconditioned to ride another day. Chill Zone has a special refrigerant that freezes metal as low as -50°F/-45°C contracting it and breaking the rust bond. Then Chill Zone's penetrant breaks down and flushes out the rust. With Chill Zone, most rusted parts quickly regain full functionality. Plus, it lubricates, too, so you don't need to add any. - Great for frozen crank bolts, seized seat posts and rusty chains and derailleurs - Includes oils and rust inhibitors to provide lubrication and protection after use - Use: Spray the rusted part for 10 to 20 seconds and wait 2-3 minutes for the release agent to fully wick in and break the rust. For severe rust-welded parts, spray 30-60 seconds for maximum freezing effect and wait ten minutes to one hour for thorough break-down of rust. When rehabbing a bicycle chain, soak one small section at a time.

E-Bike Cleaner is formulated to remove grit and grime from frames, wheels and components of e-Bikes. To ensure a clean e-Bike while not damaging expensive electronic components, Finish Line engineered a clinging foam cleaner that is gentle, noncaustic, leaves no streaks, and requires no water rinsing. Finish Line’s e-Bike Cleaner is an ideal complement to any dealer specializing in e-bike sales and service.

For a clean, smooth-pedaling drivetrain, look no further than Finish Line's Ceramic Wax Lubricant. Its ceramic bonding technology allows you to greatly extend your re-lubing intervals for maximum durability and convenience. In fact, every time you apply the lube, it builds on the ceramic coating and the result is a chain so slippery even dirt has a hard time sticking! Think efficient. Think quiet. Think Finish Line! - With each application the ceramic coating is enhanced, ultimately providing the durability of many oil-based lubricants - No wetness or stickiness so dirt and grime will not be attracted or absorbed by the lubricant - Helps avoid abrasive wear allowing parts to run more smoothly and last longer - As the white ceramic particles embed themselves on the chain they will displace grime, causing a grey or black film to form on top of the wax coating. Over 2-3 applications this will lessen or cease. This discoloration is normal and will not compromise performance.

Regular lubrication of bicycle chains addresses annoying squeaks and noises, and extends the life of the chain and drivetrain components. Formulated using a proprietary blend of oils, Park Tool CL-1.2 Chain Lube works great in wet or dry conditions. It penetrates, reduces friction, prolongs component life, displaces moisture, and protects parts from rust and corrosion. Compatible with all bicycle chains. Also works great as general-purpose light lubricant for use on bicycle brake and derailleur cables and housing, spoke nipples, and derailleur and brake pivots. - 4 fl. oz. (118 mL) bottle NOTE: Some painted surfaces can be sensitive to oil and grease. Clean off any excess oil or grease immediately. Test first on an inconspicuous area to see if it causes a stain or discoloration.