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A blender that leaks underneath the jar most often has a missing, misplaced, worn, or poorly seated seal around the blade assembly—or a cracked jar. First find where the liquid appears: leakage from the lid has different causes, and liquid reaching the motor housing calls for extra caution. Unplug the blender before inspecting or handling the jar or blades.
Find where the leak starts
“Leaking from the base” can mean liquid is escaping from the jar’s bottom assembly, or that liquid has run onto the blender’s motor housing. Dry the outside of the jar and look for the first wet point before deciding what to repair.
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- At the lid: Liquid may be spilling over because the jar is overfilled or the lid is not positioned correctly. Tefal and Kenwood distinguish this kind of top leakage from a leak underneath the jar.
- At the blade assembly or jar seam: Check the seal, how the blade unit is fitted, and the surrounding jar for damage.
- Through the jar wall: A crack or split can let liquid escape. Stop using a cracked jar.
- On the motor housing: The liquid may have traveled from a leak above. Unplug the blender and do not use it while liquid is present on or inside the motor base.
How to check and fix a bottom leak
- Stop and unplug the blender. Do not inspect or adjust the jar while the appliance is plugged in.
- Remove the jar and dry its exterior. This makes it easier to identify the original leak point rather than follow liquid that has run down the outside.
- Inspect the jar for cracks. Check the bottom and sides. If you find a crack or split, stop using the jar and consult the manufacturer’s replacement-parts or service options.
- Check the blade assembly and seal against the model’s manual. If the blade unit is designed to come off, verify that its gasket or sealing ring is present, correctly oriented, and seated as the instructions show. Braun Household advises checking that the gasket is present and the blade assembly is screwed tightly onto the jar. Tefal and Magimix also direct users to check that the seal is correctly positioned.
- Reseat or tighten only as the manual specifies. A removable unit may need to engage fully with its recesses or screw into place without a gap. These details vary by model; do not apply another brand’s fitting or locking method to your blender.
- Replace a damaged seal only with a compatible part. Match the gasket to the exact blender model and follow the manufacturer’s instructions. Rings that look similar can differ in profile, dimensions, or orientation.
- Stop and seek service if the leak remains. If the seal is built in, the blade unit is not meant to be removed, or the assembly still leaks after a model-approved check, contact the manufacturer or an approved repair centre.
When a gasket check is not the answer
The jar is cracked
A cracked container cannot be made safe by tightening the blade assembly or replacing its gasket. Tefal and Oster identify a cracked or split jar as a possible source of leakage. Stop using it and check the manufacturer’s guidance for a compatible replacement jar or service.
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The blade unit or seal is not removable
Do not force a blade assembly apart if the model is not designed for user removal. Tefal advises having a non-removable blade unit with a suspected damaged seal checked by an approved repair centre. It also recommends approved service if leakage persists.
#1 Best Overall
Sale
Blender Gasket Replacement Parts, Rubber Ring Seal Rings Blender Accessories for Oster and Osterizer Blender (4 Pieces)
- 【Compatible】：These blender replacement parts are compatible with Oster and Osterizer Blender. But not for Oster Pro 1200, In2uitive blender, please check the model number before purchase.
- 【High quality material】：The Oster blender gasket is made of high quality rubber. Seals perfectly, no leakage, durable and suitable for dishwashers.
- 【Recommendation】：Before replacing the gasket, make sure the worn gasket is removed from the blade! We recommend replacing the extractor blades every 6 months for best performance.
- 【Size of the replacement gaskets】：These O-ring gaskets are compatible with Oster and Osterizer blender; the inside diameter of the gasket is approximately 1.95 inches/4.95 cm and the outside diameter is 2.59 inches/6.58 cm, please check the size before purchasing.
- 【Buy with confidence】：This high quality part fitted your blender perfectly and saved your from having to buy a new blender. It works as good as the part it replaced and installation was a breeze.
Liquid has reached the motor base
Leave the blender unplugged and stop using it. Contact the manufacturer or an approved repair service for model-specific advice rather than continuing to run the appliance to test whether the leak has stopped.
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Bestseller No. 4
Best Value
5Pcs Rubber Gaskets Seal O-Rings for Oster and Osterizer Blender Blade
- 【Compatibility】This rubber O-ring gasket fits Oster and Osterizer blenders. It is NOT compatible with Oster Pro 1200 and In2uitive models. Please verify your blender’s model and dimensions before purchase to ensure a perfect fit
- 【Quality Materials】This sealing ring is made of food-grade silicone, BPA-Free, non-toxic and odorless. Soft, elastic and deformation-resistant, it offers tight sealing and supports long-term repeated use
- 【Tight Seal & Easy Install】Flexible with snug fit for outstanding sealing performance. Stops liquid spills and food splatters while blending. Effortless to mount: just detach the jar base cover and ice blade to swap out the worn gasket
- 【Universal Fit】Sealing ring inner diameter: approx 1.97in / 5cm, outer diameter: 2.6in / 6.6cm. Kindly verify dimensions prior to purchase
- 【Thoughtful After-Sales Service】Top-grade accessory matches your blender perfectly, so you don’t need to get a brand-new blender. Reach out to us anytime if you meet issues with fit, installation or size, or you are unsatisfied
Rank #4
Equust 6-Pack Rubber Gaskets Sealing O-Ring Compatible with Oster Blender Replacement Parts, Small, Grey
- Practical Solution: Solve leaks and save money with these replacement gaskets for your blender.
- Compatible Models: Fits most Oster and Osterizer Blender models, excluding Oster Pro 1200 and In2uitive blenders. Inner diameter: 1.95 inches (4.95 cm), outer diameter: 2.55 inches (6.47 cm). Verify size before purchase.
- Quality Material: Made of durable elastic rubber for long-lasting use.
- Easy Installation: Simply replace the old gasket by removing the jar base cap and ice blade.
- Package Contents: Includes 6 blender gasket seals for ample replacements.
Rank #3
2pcs Gray Rubber Blender Gasket Replacement for Oster Osterizer
- Product Content: You will receive 2 pieces of blender gaskets, which are compatible with Oster and Osterizer. They are sufficient to meet your needs of usage and replacement. Please note that our product is not sponsored or endorsed by, or affiliated with the brands it fits, including Oster and Osterizer.
- Premium Material: The blender replacement gaskets are made of rubber, which are safe, soft, not easy to break or aging and with good elastic resilience performance, not easy to deform. They also have excellent sealing performance. You can feel confident to use them for a long time.
- Product Size: The O-ring blender gasket replacement measures 6.6x6.6x0.2cm/2.6x2.6x0.08in, which can fit for blender models with a blade base of 2 3/4"(70mm) outer diameter. Please confirm the size before purchasing.
- Good Sealing: The blender gaskets have good sealing performance, which can prevent the food in your blender from leaking during your food making process. They can also help you keep out the dust and keep your food and table clean.
- Easy to Install: The blender gaskets are soft and flexible for you to install and take off. You only need to take off the old gasket and replace it with our gasket and it is ready for you to use. No other tools required, convenient for you to operate.
Rank #2
BokWin 2Pcs Blender O-Ring Gasket Seal
- 【Size】Outer diameter: about 6.6cm/2.59inch, inner diameter: about 5.1cm/2inch. -- Package Include: 2 packs rubber blender gaskets, color: grey.
- 【Material】Made of high quality rubber with good elasticity and stretchable, non-toxic, durable for a long time using.
- 【Well Sealed Design】Our rubber blender gaskets is soft and lightweight, which have a good sealing effect when using the mixer to prevent leakage.
- 【Compatibility】The blender gasket replacement is compatible with Oster kitchen centers and Osterizer blender. The damaged gasket of the blender can be replaced to increase its service life, simple accessories offer much convenience to life.
- 【Quality After Sale Service】 Satisfying customers is BokWin's top priority. If you do not 100% satisfied with our products or if you have any questions, you can contact us anytime. BokWin would solve all the problems to your satisfaction. Free Replacement or Refund within 90 days.
How to avoid a repeat leak
- Use the jar, blade assembly, and seal in the configuration specified in your model’s manual.
- Before blending, confirm that a removable blade unit is fully seated and that its seal is in the correct position.
- Use replacement seals and jars specified for the exact model; appearance alone does not establish compatibility.
- If liquid appears at the lid, check the fill level and lid position before assuming the bottom assembly is leaking.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
