Buy a decent ANSI Class A kit as the base, then add the four things a garage needs that the base kit won't have: a tourniquet, a real eye flush, proper burn coverage, and enough gloves and trauma pads to handle one serious bleed instead of six paper cuts. Mount it by the door you'd actually run for. Then learn to use the three items that matter, because a kit you've never opened is decoration.
Why this matters
Garage injuries have a specific profile, and it isn't the one the drugstore kit was designed around. The realistic list is lacerations from sheet metal edges, spring clips, and a wrench that slipped; burns from exhaust, headers, and hot coolant; eye injuries from grinding sparks, falling rust, and brake cleaner overspray; crushed or pinched fingers; and chemical contact with fluids that are hostile to skin and eyes. A box of adhesive bandages and a foil packet of antibiotic ointment addresses roughly one item on that list.
The second factor is that you're usually alone, and one of your hands may be the injured one. Everything in the kit has to be findable and openable one-handed, with blood or oil on your fingers, in a hurry. That is a real constraint on how you pack and where you mount it.
Key point: The kit's job is to buy time and stop bleeding — not to help you avoid a trip you should be taking. Most of what follows is about handling the first ten minutes well enough that the emergency room has something to work with.
Start with an ANSI Class A kit
The relevant benchmark is ANSI/ISEA Z308.1-2021, the voluntary standard that sets minimum contents for workplace first aid kits. It splits kits two ways, and both splits matter for a garage.
Class A covers the common workplace injuries — major and minor wounds, minor burns, eye injuries. Its required assortment runs roughly: adhesive bandages, adhesive tape, antibiotic application, antiseptic, a breathing barrier, burn dressing, burn treatment, a cold pack, eye covering, a first aid guide, hand sanitizer, exam gloves, eye/skin wash, roller bandage, scissors, sterile pads, trauma pads, and triangular bandages. Class B is for higher-hazard or more populated sites: everything in Class A in larger quantities, plus two items Class A does not require — a splint and a tourniquet.
Containers are graded by type. Type I is a fixed indoor wall unit, Type II is indoor portable, Type III is portable with a water-resistant seal and a way to mount it, and Type IV adds corrosion, moisture, and impact resistance for mobile and outdoor use. A garage kit lives in dust, temperature swings, and occasional solvent mist, and sometimes rides in the rig. Buy Type III or IV. A cardboard-partitioned Type II box on a shelf turns into a brick of stuck-together supplies in about two summers.
For a home shop, buy a Class A kit and upgrade it, or buy Class B outright — the splint and tourniquet are exactly the two things a Class A kit is missing for this environment.
The four upgrades a garage kit needs
- A real tourniquet, and the knowledge to use it. A windlass-style commercial tourniquet — a CAT or SOFTT-W pattern — not an improvised belt, not a rubber strap. This is the single item that changes an outcome, and it's the Class B addition worth having whether or not the rest of your kit is Class B.
- Eye flush with actual volume. The token 1-oz bottle in a discount kit is a rinse, not a flush. Stock at least a liter of sterile saline in squeeze bottles, or mount a gravity-fed eyewash station if you use corrosives regularly.
- Burn coverage, not burn ointment. Large sterile non-adherent dressings and a clean way to run cool water. Skip the "burn spray" theater.
- Quantity where it counts. A dozen nitrile gloves, several 5x9 trauma pads, two rolls of gauze, and one 4-inch elastic wrap. One serious laceration consumes more dressing material than most kits contain.
Worth adding beyond that: fine-point tweezers and a magnet for metal splinters, a permanent marker (for writing a tourniquet time on skin), an emergency blanket, a small LED light, and your phone charged. Keep a note inside the lid listing the chemicals in the shop — poison control and the ER will both ask, and product names beat guesses. If you keep aspirin in the kit for a suspected heart attack, keep chewable 81 mg tablets and take them only if a 911 dispatcher tells you to.
Stopping bleeding
Order of operations, and it doesn't change: direct pressure first. Press hard with gauze or a trauma pad, with your palm behind it, and hold it. Most shop lacerations stop here. Don't lift the dressing every thirty seconds to check — add material on top and keep pressing.
If blood is spurting, pooling fast, or soaking through everything you put on it, that's an artery, and pressure alone is losing. Go to the tourniquet:
- Place it on the limb 2 to 3 inches above the wound, between the wound and the heart. Never over a joint — go above the knee or elbow if the wound is on one.
- Pull the strap tight, then twist the windlass until the bleeding stops, and clip the rod so it can't unwind. It will hurt. Correct application hurts; that isn't a sign you did it wrong.
- Write the time on the person's skin with the marker, or on the tourniquet's tab.
- Do not loosen it, do not "check it," and do not take it off. That's an emergency department decision.
- Call 911. A tourniquet is not a treatment you drive home from.
For a wound where a tourniquet can't go — armpit, groin, neck, torso — pack the wound with hemostatic or plain gauze, pressing it deep into the cavity, and hold hard pressure until help arrives.
Take the training. Stop the Bleed courses run about an hour, cost little or nothing, and are widely offered by hospitals and fire departments. Reading a tourniquet sequence is not the same as having twisted one down on a training limb. This is the highest-return hour of shop safety education available.
Burns
Exhaust manifolds, turbos, and radiator hoses cause most shop burns, and hot coolant causes the worst of them — see hot coolant burns for why the system has to be cool before you open it.
Treatment is cool running water, and duration matters more than people expect. The American Burn Association recommends at least 5 minutes; the British, Australian/New Zealand, and European burn associations all call for 20 minutes, and the evidence behind that number is good — 20 minutes of cool running water applied within three hours of the burn is associated with lower odds of needing a skin graft or hospital admission. Twenty minutes is the target.
- Cool water, not ice. Ice causes vasoconstriction and can deepen the injury, and on a large burn it risks hypothermia.
- No butter, no oil, no toothpaste, no ointment on anything worse than a small superficial burn. They trap heat and have to be cleaned off later.
- Remove rings, watches, and anything constricting before swelling starts.
- Cover loosely with a sterile non-adherent dressing or clean plastic wrap. Don't pop blisters.
- Go to an emergency department for burns that are deep, charred or white, larger than the palm of the hand, or on the face, hands, feet, genitals, or across a joint. Same for any electrical burn — the surface wound tells you nothing about the path the current took.
- Chemical burns: brush off dry powder first, then flush with water for a long time — 15 to 20 minutes minimum. Don't try to neutralize an acid with a base on skin; the reaction generates heat.
Eyes
Two different emergencies get confused here, and the correct responses are opposites.
A chemical splash gets flushed, immediately and for a long time. Hold the lids open and flush from the inner corner outward so the runoff doesn't cross the other eye. Take contacts out. The benchmark is the one set by ANSI/ISEA Z358.1 for plumbed equipment: a 15-minute flush at 0.4 gallons per minute, with tepid water between 60 and 100°F, reachable within 10 seconds — about 55 feet — of the hazard. Personal squeeze bottles are classified as supplemental to that, not a replacement. Battery electrolyte, brake cleaner, and cold-tank degreaser all belong in this category; see chemical handling and ventilation. Flush first, then go to the ER, and take the product label with you.
An embedded particle does not get flushed, rubbed, or dug at. A grinding or drilling fragment lodged in the cornea is a job for an ophthalmologist — steel begins forming a rust ring within hours, and picking at it makes the eventual repair worse. Don't remove anything impaled in an eye. Cover the eye with a rigid shield (a paper cup taped over the socket works), leave the other eye covered too if you can tolerate it, since eyes track together, and go now.
The cheaper answer to this whole section is wearing Z87+ eye protection, which prevents nearly every case above.
The injuries a first aid kit does not treat
Recognizing these fast is worth more than any supply on the list.
- High-pressure injection injury. A pinhole leak in a hydraulic line, a grease gun, a diesel injector, or a pressure washer tip can drive fluid through skin. The entry wound looks trivial — a small puncture, sometimes with almost no pain at first — while the fluid tracks along tendon sheaths and destroys tissue from inside. Published amputation rates run roughly 16 to 55 percent, and higher with solvents and paint. This is a surgical emergency: go to an emergency department immediately, say the words "high-pressure injection injury," and name the fluid. Do not wait to see if it gets worse overnight. More on the systems that cause it in hydraulic system pressure.
- Crush injuries and amputations. Control bleeding, then handle the severed part correctly: wrap it in moist sterile gauze, seal it in a watertight bag, and place that bag on ice or in ice water. Never put tissue in direct contact with ice, and never submerge it in plain water.
- Anything under a vehicle that shifted. If a rig comes off its supports with a person under it, that's a 911 call, not a jack-and-lift attempt by one bystander. Read working under a vehicle safely and make it never happen.
- Suspected carbon monoxide exposure. Get out into fresh air and call for help — headache, nausea, and confusion in a closed garage are the presentation. See carbon monoxide in the garage.
- Electrical shock across the body, any impaled object, any head injury with confusion or loss of consciousness, and any puncture from a dirty or rusty object where your tetanus status is unknown.
Being alone changes the math. Nobody is coming to check on you until dinner. Keep your phone in your pocket rather than on the bench, tell someone when you're starting a job that puts you under a vehicle or into a fuel system, and don't run a grinder, a press, or a torch at 1 a.m. with no one awake in the house. Everything in the kit assumes someone is conscious to use it.
Placement and maintenance
- Mount it, don't shelve it. A wall-mounted kit at the door you'd run for, visible, unblocked. Bottom of the tool chest under a torque wrench is the same as not owning one.
- Second kit in the rig. Wheeling and trail repairs are exactly where a laceration happens far from a hospital. A Type IV kit lives in a vehicle without degrading.
- Check it annually and after every use. Adhesive backing dries out, antiseptic wipes evaporate in their foil, saline and burn gel carry expiration dates, and cold packs fail. Write the check date inside the lid.
- Keep the tourniquet out of prolonged sun and heat. UV degrades webbing. Store it in the kit, not clipped to a window frame, and replace any tourniquet you've used for practice — training reps stretch the strap.
- Restock immediately. The gauze you used last month is the gauze you'll want next time.
Common mistakes
- Buying a 200-piece kit where 180 pieces are adhesive bandages and calling the shop covered.
- No tourniquet, on the theory that arterial bleeding happens to other people.
- Owning a tourniquet you've never taken out of the wrapper.
- Icing a burn, or reaching for ointment before the burn has been cooled.
- Cutting a burn's cooling short at two minutes because it stopped hurting.
- Rubbing an eye after a grinding spark, or trying to pick a fragment off a cornea with tweezers.
- Treating a pinhole injection wound as a puncture and going to bed.
- Mounting the kit on the far wall, behind the parts washer.
- Never checking expiration dates, then discovering it during the emergency.
- Skipping the tetanus booster. It's a ten-year interval and it's free at most pharmacies.
What to do next
Order a Class A or Class B kit in a Type III or IV case, add a commercial tourniquet, a liter of sterile saline, a handful of trauma pads, and a box of nitrile gloves. Mount it by the door this weekend and write the check date inside the lid. Then sign up for a Stop the Bleed class — the kit is the cheap half of this, and the hour of training is the half that actually works.
None of this replaces medical care or formal first aid training, and it isn't meant to. It's meant to make the ten minutes before that care arrives count for something.