Here's where it earns its keep in each setting, the strength that fits each job, and the places you shouldn't use it at all. Plenty of these jobs work better with a diluted mix than with straight 99%. Our dilution guide shows exactly how to mix one.

Isopropyl alcohol uses at a glance

Industrial and manufacturing uses

In a plant, IPA is the wipe you reach for when a surface has to be clean before something else happens to it.

• Surface prep before bonding. Tapes, adhesives and sealants grip poorly on oily surfaces. An IPA wipe takes off fingerprints and light oil so the bond hits bare material. Heavy grease and mold release usually need a degreaser or abrasion first. 3M, for one, calls for a 50/50 IPA and water wipe on most surfaces before its VHB tapes go on, so check your product's data sheet.
• Degreasing parts and tools. Machined parts come off the line carrying a light film of cutting oil and handling grime. IPA dissolves light oils and flashes off, so there's no rinse and no long dry time.
• Before painting or powder coating. A final solvent wipe after sanding removes the oils your hands leave behind. Use IPA or the cleaner your paint maker specifies.
• Printing and 3D printing. Offset print shops add IPA to their fountain solution and use it for general press cleanup. Resin 3D printers rely on it to wash uncured resin off finished parts.
• Labs and cleanrooms. Benches and equipment get wiped down with IPA, and electronics cleanrooms often use 99% or higher where water is a problem.
• Maintenance. Grease on control panels, grime on sight glasses, old label adhesive on equipment and signage.

Electronics and tech

This is where 99% matters most. Less water in the bottle means less moisture sitting on a circuit.

• Flux residue on circuit boards after soldering. Water-soluble flux needs water instead, and heavy flux may call for a dedicated flux remover.
• Old thermal paste on CPUs and heat sinks
• Contacts, connectors and card slots
• Keyboards, mice and headsets
• Screens, with a caveat. Many device makers, including Apple and Dell, allow a 70% IPA wipe, but some screen coatings don't like alcohol. Check the maker's cleaning guidance first.

Power down and unplug first. Put the IPA on a lint-free cloth or swab, not straight onto the device, and let everything dry completely before you power back on.

Automotive and detailing

Detail shops and wrap installers go through IPA fast.

• Panel wipe before coatings and sealants. Polishing oils sit on the paint and can keep a coating from bonding. A diluted IPA wipe, or the coating maker's own panel-prep product, clears them. Follow your coating maker's prep instructions.
• Checking your polishing work. Polish oils can fill fine scratches and hide them. A weak IPA wipe shows you what's really left before you move on.
• Wrap and PPF installs. Installers prep panels with it, and a tack solution is typically IPA mixed with water.
• Glass. A 50/50 mix cuts the haze and film that some glass cleaners leave behind.
• Adhesive residue. Old badges, dealer decals and parking stickers. Full-strength 99% works well here.

One thing to know: IPA can remove or weaken wax and some sealants. That's the point before a coating, but don't wipe down protected paint with it unless you plan to re-protect. And keep strong IPA off rubber seals for long stretches. CDC notes that prolonged, repeated alcohol exposure can swell and harden rubber.

Restaurants and commercial kitchens

In a restaurant, IPA is for cleaning the surfaces around the food, not the ones that touch it.

• Stainless steel. Reach-in doors, prep cooler fronts and hood exteriors. Fingerprints and grease smears come off without streaking. Wipe with the grain.
• Glass doors on display cases and beverage coolers.
• POS terminals, tablets and card readers. Check the maker's guidance first.
• Label and tape residue on storage containers and equipment. Then wash, rinse and sanitize those containers the usual way before they go back into service.
• Laminated menus.

Offices, janitorial and facilities

• Desks, phones, keyboards and touchscreens (check the maker's guidance)
• Whiteboards with permanent marker or ghosting
• Glass partitions, doors and mirrors
• Stainless elevator panels and handrails
• Tape and sticker residue on walls, doors and windows (test painted walls first)

Around the house

• Sticker and price-tag residue on glass, metal and most hard plastics. Test plastic first.
• Permanent marker on hard, non-porous surfaces.
• Mirrors and windows. A 50/50 mix with distilled water dries fast with few or no streaks.
• Stainless appliances and chrome fixtures. Fingerprints and soap film.
• Phones, remotes and controllers. Power off, dampen a cloth, don't drip.
• Ballpoint ink on some fabrics. Dab, don't rub, and test a hidden spot. It can lift dye along with the ink.

Where you shouldn't use isopropyl alcohol

• Finished wood. It dissolves shellac, and repeated rubbing can soften some lacquer finishes.
• Acrylic and plexiglass. Strong alcohol can craze it. Use only the weak dilution the sheet maker allows, if any.
• Leather. It dries leather out and can pull dye and finish.
• Rubber and some plastics. CDC notes that prolonged, repeated exposure can swell and harden rubber and some plastic tubing.
• Coated screens and lenses. Anti-glare and anti-reflective coatings vary, so follow the maker's guidance.
• Anything hot, running or near a flame.

Handling IPA safely

• Treat it as highly flammable. NIOSH lists its flash point at 53°F. No flames, sparks or smoking nearby, and unplug hot tools.
• Ventilate. IPA vapor is heavier than air and collects low, near floors and in pits.
• Protect hands and eyes on big jobs. Wear solvent-resistant gloves and splash-proof eyewear.
• Bond and ground drums when you transfer from a 55-gallon drum. Static can ignite the vapor. Use non-sparking tools.
• Store it cool and closed, away from heat and oxidizers.
• Read the SDS before you put it into a workplace.

Why buy 99% in bulk

99% is the most flexible strength you can buy. Use it straight where water would cause problems, and cut it with water everywhere else. One gallon of 99% makes about 1.4 gallons of 70%. A 5-gallon pail makes about 7 gallons of 70%, and a 55-gallon drum makes about 78.

Frequently asked questions

What is 99% isopropyl alcohol used for?

99% is used for jobs where water would cause trouble: cleaning electronics and circuit boards, removing flux and thermal paste, lifting adhesive residue, degreasing parts, and washing resin 3D prints. It evaporates in seconds and leaves almost nothing behind.

Can you clean stainless steel with isopropyl alcohol?

Yes. IPA takes fingerprints, smudges and light grease off stainless without streaking. A 50–70% mix on a microfiber cloth works well. Wipe with the grain, and only on cold surfaces.

Is isopropyl alcohol safe on car paint?

A diluted IPA wipe, or the coating maker's own panel-prep product, is common prep before ceramic coatings on cured factory paint. It can remove or weaken wax and some sealants, so re-protect the paint afterward.

Can restaurants use isopropyl alcohol?

Yes, for cleaning around the kitchen: stainless fronts, glass doors, POS screens and label residue. It doesn't replace the food-contact sanitizer your health code requires. Keep it away from hot equipment and open flames.

What's the difference between isopropyl alcohol and rubbing alcohol?

Isopropyl rubbing alcohol is a first-aid product that's 68–72% isopropyl alcohol. Industrial IPA is the solvent itself. We break down the difference here.