How To Keep Plumbers Putty From Drying Out

Plumber's putty, a pliable clay-like substance, is invaluable for creating watertight seals around drains, faucets, and other plumbing fixtures. However, its tendency to dry out and harden over time can be frustrating. Here's how to keep your plumber's putty in prime condition.
Understanding the Enemy: Air Exposure
Air is the primary culprit behind plumber's putty hardening. The oils within the putty evaporate when exposed to the atmosphere, leading to a loss of pliability and eventual cracking.
Immediate Actions After Use
After you've finished your plumbing project, take these steps immediately:
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Reshape the Remaining Putty
Before storing, mold the remaining putty back into a compact ball or cylinder. Minimizing the surface area exposed to air is crucial.
Remove Excess Putty from Surfaces
Clean any excess putty from your hands, tools, and the surrounding work area. Dried putty is much harder to remove later.
Storage Solutions: Your Arsenal Against Drying
Proper storage is key to extending the life of your plumber's putty.

The Original Container: First Line of Defense
If your putty came in a container with a tight-fitting lid, that's your best bet. Ensure the lid is securely closed after each use.
Airtight Containers: An Upgrade
For added protection, transfer the putty to an airtight container, such as a small plastic tub with a snap-on lid or a resealable plastic bag.
Submerging in Water: A Time-Tested Method
Completely submerge the putty in a small container of water. The water acts as a barrier, preventing air from reaching the putty. Ensure the water is clean and change it every few weeks to prevent mold growth.

Sealing with Oil: Creating a Protective Layer
Cover the surface of the putty with a thin layer of mineral oil, petroleum jelly (Vaseline), or even vegetable oil. This creates a barrier that slows down evaporation. When you need to use the putty again, simply wipe off the oil.
Double Bagging: Extra Protection
Place the putty in a resealable plastic bag, squeeze out as much air as possible, and then place that bag inside another resealable plastic bag. This double layer of protection further minimizes air exposure.
Cool, Dark Place: Ideal Storage Conditions
Store the putty in a cool, dark, and dry place. Avoid direct sunlight and extreme temperatures, as these can accelerate the drying process. A basement, garage, or utility closet are often good choices.
Reviving Hardened Putty: The Resurrection Techniques
Even with the best storage practices, plumber's putty can sometimes begin to harden. Here's how to try and bring it back to life:

Kneading and Working: The Initial Approach
If the putty is only slightly hardened, try kneading and working it with your hands. The friction and pressure can help to redistribute the oils and restore some of its pliability. Wear gloves if you prefer.
Adding Oil: Reintroducing Moisture
Add a few drops of mineral oil, petroleum jelly, or even a small amount of water to the putty and knead it thoroughly. The added moisture can help to soften the putty and make it more pliable. Be careful not to add too much liquid, as this can make the putty too soft and difficult to work with. Start with just a drop or two and add more as needed.
Microwaving (Carefully!): A Last Resort
As a last resort, you can try microwaving the putty for a few seconds. This should be done with extreme caution, as overheating can cause the putty to melt or even catch fire. Place a small amount of putty in a microwave-safe dish and microwave for no more than 5-10 seconds at a time. Check the putty after each interval and stop microwaving as soon as it becomes slightly softened. Knead the putty thoroughly after microwaving to ensure that the heat is evenly distributed.

Warning: Never microwave plumber's putty in its original container. Use a microwave-safe dish only.
Practical Applications in Daily Life and Work
These techniques are valuable not just for homeowners but also for professionals:
- Homeowners: Keep putty fresh for minor plumbing repairs, preventing leaks around faucets and drains.
- Plumbers: Maintain a consistent supply of usable putty on job sites, reducing waste and saving money.
- Maintenance Personnel: Ensure quick access to pliable putty for immediate repairs in commercial or residential buildings.
- DIY Enthusiasts: Preserve putty for various sealing and caulking projects beyond plumbing.
Avoiding Common Mistakes
Steer clear of these common pitfalls:
- Leaving the putty exposed: This is the fastest way to ruin it. Always store it properly.
- Using contaminated water: Dirty water can introduce mold and bacteria, shortening the putty's lifespan.
- Overheating in the microwave: Extreme heat can permanently damage the putty.
- Adding too much liquid: Excessive moisture can make the putty too soft and difficult to use.
Plumber's Putty Preservation Checklist
Follow this simple checklist to maximize the lifespan of your plumber's putty:
- Reshape leftover putty into a compact form.
- Store in the original container or an airtight alternative.
- Consider submerging in water or sealing with oil.
- Store in a cool, dark, and dry place.
- If hardened, try kneading, adding oil, or microwaving (with extreme caution).
