Leather goes stiff for two reasons. New leather hasn't been flexed yet, and old leather has lost the oils that kept the fibres sliding past each other. Rain, mud and sweat wash those oils out, and drying wet boots on a radiator finishes the job. The result is the same either way: boots that rub your heels, gloves you can't make a fist in, and a belt or gun sling that creaks and cracks at the bends.
Knowing how to soften leather is mostly about putting oil back in and then working the leather by hand. The same method works on boots, gloves, belts, jackets and slings.
The short version: clean the leather and let it dry at room temperature. Rub a thin coat of Ballistol Universal Oil into it with a soft cloth, paying most attention to the creases and bends. Leave it for an hour, buff off the excess, then flex the leather by hand or wear it. Repeat after 24 hours if it still feels hard.
Why leather goes hard
Leather is a mesh of fibres held apart by oils and fats added during tanning. When those oils go, the fibres bind together and the leather stiffens. Water is the usual culprit. A soaking on a winter walk pulls oil out as it dries, and fast drying next to a heat source pulls out more and can crack the surface.
New boots and belts are a different case. The leather is fine, it just hasn't been bent in the places your foot or waist needs it to bend. Oil helps here too, but wearing them does most of the work.
What you'll need
- Ballistol Universal Oil. The bottle is easiest for leather because you control the amount on the cloth. The spray works too if you spray onto the cloth rather than the leather
- Two soft, lint-free cloths
- A soft brush and a slightly damp cloth for cleaning
- Newspaper or a cedar shoe tree if the item is wet
- Optional: Pluvonin Waterproofing Spray for boots that will see rain
Ballistol works well on leather because it soaks in rather than sitting on top. It protects leather against getting hard, dry and wet, it neutralises leftover tannic acid in the hide, and once buffed it leaves no greasy film. The oil smell fades quickly.
How to soften leather step by step
- Brush off dirt and dried mud, then wipe the leather with a damp cloth. Oil rubbed over grit drives the grit into the grain.
- Dry it slowly if it's wet. Stuff boots with newspaper, change the paper after a few hours, and leave them at room temperature for 24 to 48 hours. Keep them away from radiators, stoves and hairdryers.
- Test the oil on a hidden spot, such as the tongue of a boot, the inside of a belt or the cuff lining of a glove. Leave it 15 minutes and check the colour.
- Put a few drops of oil on a folded cloth. Around 5 ml, roughly a teaspoon, covers one boot upper for a first coat.
- Rub it in with small circles, working along the seams and into the creases where the leather bends. Do the welt and stitching too, because that's where water gets in.
- Leave it for about an hour so the oil can soak into the fibres.
- Buff off anything left on the surface with a clean cloth.
- Flex the leather by hand for a few minutes. Bend a boot at the toe crease, roll a belt round on itself, work glove fingers back and forth.
- Leave it overnight. If it still feels hard the next day, apply another thin coat and repeat.
Thin coats are the key. Pouring oil on doesn't soften leather faster. It leaves the surface tacky, darkens it more and can make it attract dust.
How to soften leather boots and shoes
Boots are the job most people are trying to sort out, either a new pair that's rubbing or an old pair that's gone hard over the summer in a shed. Follow the steps above, then wear them. Put on a pair of thick walking socks and wear the boots around the house for 30 minutes at a time over a few evenings. Your foot heats the leather, and the creases form where they should.
The heel counter and the toe cap are deliberately stiff on most walking and work boots. Don't try to soften those. Concentrate the oil on the flex point across the front of the foot and the ankle collar, which is where most rubbing starts. If you need to soften leather shoes fast before an event, a shoe stretcher overnight combined with one coat of oil does more than any amount of heat.
Once the boots are soft, a coat of Pluvonin on the dry leather adds water resistance for wet British winters. Our leather care page has the regular cleaning routine to keep them that way.
Gloves, belts, jackets and slings
Leather gloves soften best while you're wearing them. Put a few drops of oil on your palms, put the gloves on, and work the oil in by opening and closing your hands for a couple of minutes. Wipe off the excess and leave them flat to dry.
A stiff leather belt usually just needs oil on both faces and a few rolls into a tight coil and back. Work the oil along the whole length rather than in one spot, and give the buckle holes and the fold at the buckle extra attention.
For a leather jacket, treat the elbows, cuffs and collar, which take the most bending. Many fashion jackets have a pigmented or coated finish that won't take oil. If a drop beads up instead of soaking in, leave it.
Gun slings go hard from rain and hand sweat. Oil them off the gun so nothing runs into the action, buff them well and let them dry overnight before refitting.
How much and how often
| Item | First treatment | Then |
|---|---|---|
| New stiff boots | 1 thin coat, then wear in short sessions | Every 2 to 3 months in regular use |
| Old, dried-out boots | 2 to 3 thin coats, 12 to 24 hours apart | After any soaking, once dry |
| Gloves | A few drops worked in while worn | When they start to feel tight |
| Belts and gun slings | 1 to 2 coats, both faces | Twice a year |
| Leather jacket | 1 coat on bends only, after a hidden test | Once a year |
Mistakes that damage leather
Heat is the big one. A radiator, an oven or a hairdryer will make leather feel soft for a minute and then leave it harder and cracked once it cools. Let it dry slowly.
Oil darkens light leather, and Ballistol is no exception: bright tan can go a shade or two deeper. That's why the hidden test matters. Suede and nubuck are not for oil at all, as it leaves dark patches that don't come out.
If you use the spray, work outside or with a window open, and keep the can away from heat and naked flames. Safety data sheets for the whole range are on our technical data page.
Questions people ask
What is the quickest way to soften leather boots? Oil them, then wear them. A thin coat of oil worked into the flex points, followed by a few 30 minute sessions around the house in thick socks, softens most boots within a week. Heat speeds nothing up safely and often cracks the leather.
Will Ballistol soften leather? Yes. Ballistol Universal Oil is made to stop leather going hard and dry, and dry leather softens and becomes elastic again after treatment. Expect a dull shine rather than a gloss, and light leather may go a shade darker.
Does Vaseline soften leather shoes? It can make them feel softer for a while, but petroleum jelly mostly sits on the surface, stays greasy and picks up dirt. A thin oil that soaks into the fibres does the job without leaving a sticky film.
How many coats does stiff leather need? New or slightly stiff leather usually needs one coat. Old leather that has dried out hard often needs two or three thin coats, each left 12 to 24 hours before the next.
Can you soften suede or nubuck with oil? No. Oil soaks into suede and nubuck and leaves dark, flattened patches. Use a suede brush and a product made for suede instead.
Ballistol Universal Oil softens and protects leather, and the same can looks after metal, wood and rubber around the house. See the full Universal Oil range, or for advice on a particular item call +44 (0) 7817 267314 or email sales@ballistol.co.uk.
More guides: How to Oil a Gun Stock · How to Stop Rust on Metal · How to Clean a Shotgun
