If you're standing in the middle of a DIY project wondering can you use plumbers putty on pvc , the short reply is: you generally shouldn't, but there's a little more to this than a simple yes or simply no. Most old-school plumbers was raised using putty for almost every seal off within a bathroom or kitchen, but the world of domestic plumbing materials has changed a lot since after that.
Back in the day, everything was metal, cast iron, or even chrome-plated metal. Today, almost everything under your sink is usually some form associated with plastic, usually PVC. Mixing the incorrect sealant with all the wrong pipe can guide to an untidy, leaky disaster down the road, and honestly, nobody has time for your on a Weekend afternoon.
Why traditional putty and PVC don't combine
The primary reason you'll hear people warn you against using plumbers putty on PVC is the chemical makeup of the putty itself. Conventional plumbers putty is usually often oil-based. This particular oil is exactly what maintains the putty soft, pliable, and easy in order to work with regarding years. However, PVC is a thermoplastic, and certain oils can actually work as a solvent or even a degrading agent whenever they sit against plastic material for a long time.
Over the few years, all those oils can leak to the PVC, producing your invisalign aligner brittle. Once the plastic gets brittle, it's prone to cracking. You might not notice it for the year or two, but eventually, you'll visit a hairline crack right where the putty was used. At that point, you aren't simply replacing a seal; you're replacing the whole drain set up. It's a classic case of a five-minute fix turning straight into a three-hour headaches.
Checking the label for "plastic-safe" options
Today, if you actually love the way putty works—and let's be honest, it is very rewarding to roll right into a little "snake" plus press into place—you don't have to stop entirely. Manufacturers have caught on that we use much more plastic these days.
You can now find "stain-free" or "plastic-safe" versions of plumbers putty. These are typically not oil-based, or even they use the synthetic formula that won't eat apart at your PVC pipes. If the particular tub of putty specifically says it's safe for plastics, you're probably great to go. But if you're digging an old, crusty tub of generic putty out associated with the back of your garage, it's better to enjoy it safe and keep it apart from your PVC.
Where perform people usually get this mistake?
The most common spot where individuals ask can you use plumbers putty on pvc is at the kitchen or bathroom sink drain. Generally, you have a metal drain flange that will sits on best of the kitchen sink, but the body of the drain or the pipes connecting to it are usually PVC.
In the event that you're sealing the metal flange in order to a porcelain or stainless steel sink, the putty isn't touching the PVC yet, so it seems fine. Yet as you tighten the nut underneath, that putty pushes out. If it makes contact with the particular PVC threads or even the plastic casing of the drain assembly, that's where the trouble begins. It's easier to simply use a sealant that is universally safe for every thing involved.
The reason why 100% silicone is often the better choice
If you ask a contemporary plumber what they use instead of putty for PVC, 9 times out associated with ten, they're heading to say 100% clear silicone. Silicone is fantastic since it's chemically inert, meaning it won't react with all the plastic material. It creates the waterproof, flexible seal off that lasts basically forever.
A few couple of disadvantages to silicone, even though. It's much messier to apply compared to putty. Putty is like Play-Doh; if you mess up, you just pull this off and start over. Silicone is sticky, gets on your fingers, and requires a bit of gewandtheit to get a clean look. Also, you have to wait for it to cure. You can't just switch the water on immediately like you can with putty. But for a long term, "set it plus forget it" seal on PVC, silicone is the gold standard.
Putty vs. Silicone: A quick breakdown
- Ease of use: Putty wins. It's easy to mold plus easy to clean up.
- Longevity on plastic: Silicon wins. No risk of making the PVC brittle.
- Dry period: Putty wins. You can use the kitchen sink right away.
- Cleanup: Putty wins. Just wipe the surplus. Silicone requires massaging alcohol or a very steady hands.
When it's actually okay to use putty
Is there ever a time when you should use it? Sure. When you possess a metallic drain assembly and a metal sink, go for it. If you're making use of the specific plastic-safe putty we pointed out earlier, that's also totally fine.
Some people prefer putty for the underside associated with a kitchen sink basket strainer because it handles the vibration of a rubbish disposal a bit better than a firm seal might. In the event that that strainer will be metal and the sink is metal steel, putty will be the traditional choice. Just be extra careful that the "squeeze out" doesn't sit on the particular PVC tailpiece that will connects towards the base.
Tips on how to utilize it correctly (if you must)
If you've confirmed your putty is usually plastic-safe and you're ready to roll, this is how you perform it without producing a mess.
- Clean the surfaces: This is usually the part everybody skips. If there's old gunk or soap scum on the PVC or the sink, the putty won't seal. Wipe it lower with a little bit of rubbing alcohol first.
- Warm it up: Take a golf-ball-sized chunk of putty and roll it between your hands. Your body high temperature softens it up.
- Make the snake: Roll it into a lengthy, thin rope, about the thickness of a pencil.
- Wrap it: Loop it around the underside of the flange you're installing. Make sure you will find no gaps in the circle.
- Tighten down: As you tighten the drain, the putty will certainly ooze out. This is good! It means you have a solid seal.
- The clean-up: Use your finger or a plastic tool to scrape away the excess. In case it's the right kind of putty, it should come off in one clean piece.
Common myths about plumbers putty
You might hear several people say that putty is "waterproof" while silicone is only "water-resistant. " That's not really correct. Both are at stopping leaks. The real difference is how they fail. Putty eventually dries out and turns directly into a cracker-like substance over 10 or even 15 years. When it dries away, it shrinks, plus that's when the leaks start. Silicon stays rubbery, but if the surface wasn't clean when you applied this, it can peel away.
One more myth is that will you can use putty on the particular actual threads of PVC pipes. Don't perform this. Putty is not really a thread sealant. For that threads on your PVC P-trap or supply lines, you should become using Teflon video tape (plumber's tape) or even pipe dope. Putty is meant for that "mating surfaces" where a fixture meets a sink, not for the screw-on joints.
The bottom collection
So, back again to the big question: can you use plumbers putty on pvc ? You can, but just if the label explicitly says it's safe for plastic materials. If you aren't 100% sure what kind of putty you have, it's honestly not worthy of the chance.
For the majority of modern DIYers, switching to 100% silicone or just using the plastic gaskets that arrive with most fresh drain kits is usually the way in order to go. It could take a few extra a few minutes to dry, yet you'll sleep better knowing your pipes aren't slowly evolving into eggshells under your own sink. Plumbing will be all about avoiding future problems, and choosing the right sealant may be the simplest way to perform exactly that.