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Plastic toilet shims are the right product for stabilizing a toilet that rocks because the finished floor is uneven. Oatey Plumb Pak and Danco flexible tapered shims are documented toilet-specific options, but the available product information does not establish a tested winner. Choose based on the gap and the shape of your toilet base, then install the shims without disturbing the toilet seal.
What toilet shims can—and cannot—fix
A toilet shim fills a gap beneath the base so the bowl sits level and does not rock on an uneven floor. It is a stabilizing wedge, not a repair for a failed wax seal, damaged flange, or flange set at the wrong height. If the toilet keeps moving after shimming, or you find water around the base, investigate the underlying installation rather than adding more wedges. Oatey’s toilet replacement and repair guide discusses shimming and flange-related issues; its wax-ring installation guide covers setting the toilet onto the seal.
Which toilet shims should you choose?
The product evidence supports comparing documented design details, not ranking performance. No controlled comparison establishes which option lasts longest, supports the most weight, or works with every toilet and floor.
| Option | Documented details | What to check before buying |
|---|---|---|
| Oatey Plumb Pak Toilet Shims | Oatey Canada describes these as soft plastic toilet shims. See the official product page. | Check whether the wedge shape and available pack quantity suit the gap at your toilet base; the cited product information does not establish a maximum gap or load rating. |
| Danco Flexible White Multi-Purpose Plumbers Toilet Shims, 6-Pack | Danco describes flexible tapered plastic wedges and identifies the product as a six-pack. See the official product page. | Confirm the taper fits the space under your base. The cited information does not establish a tested performance advantage over other shims. |
Either is a reasonable category match when you need plastic wedges intended for toilet stabilization. Verify the product details and fit for your specific gap; do not treat “flexible” or “soft” as proof of a particular load capacity, durability, or compatibility.
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#1 Best Overall
Flexible Plastic Shims 12pcs Kit Size Variety | Clear Leveling Kit for Home Improvement | Furniture Leg Stabilizers | Table & Toilet Shims - Trim-to-Fit Wedges | Stackable Design | Furniture Levelers
- INVISIBLE PROTECTION & VERSATILITY | Transparent wedges blend discreetly while guarding wood, tile, and ceramic floors against scratches. Absorb pipe vibrations and silence rattles – ideal for plumbing fixes and tilting toilets.
- UNIVERSAL HOME & PROFESSIONAL SOLUTIONS | Fix wobbly furniture instantly! Clear plastic shims stabilize tables, bed frames, bookshelves, and dressers on any floor. Perfect for leveling appliances, shelves, and toilets – essential for DIYers and plumbers.
- INTERLOCKING STACKABLE SYSTEM | Precision non-slip ridges (6.45º angle) grip securely. Stack shims modularly to hold 22,000 lbs – adjust height for doors, cabinets, or outdoor equipment like patio umbrellas.
- PRO-GRADE DURABILITY & CUSTOMIZATION | Trim-to-fit with scissors for tight spaces. Reusable plastic shims withstand commercial use in restaurants or outdoors – level kitchen equipment and secure heavy fixtures effortlessly.
- TOOL-FREE INSTANT INSTALLATION | No tools needed! Simply slide flexible shims under legs, pipes, or bases. Solve uneven surfaces in seconds – hassle-free stability for furniture, appliances, and plumbing.
How to stop a toilet from rocking with shims
For a new installation or a toilet reset, follow the instructions for your toilet and seal, as well as applicable local code. The sequence matters: position shims during the dry fit, keep them in place while setting the toilet onto the seal, and check for leaks before caulking.
Quick Recap
Bestseller No. 2
Bestseller No. 4
Rank #4
Wobble Wedge Flexible Plastic Shims, Leveling Wedges, White, 30-Pack
- LEVELING FOR HOME IMPROVEMENTS: These versatile plastic wedges are ideal for stabilizing uneven furniture, tables, and shelves. Use them to correct tilted furniture and ensure your home fixtures stay level and sturdy.
- SUPERB FOR EVERYDAY USE: Designed for use around the house, these wobble shim wedges protect floors and furniture from scratches while stabilizing appliances and furniture. Ideal for leveling kitchen equipment and shelving units.
- FOR TOILET AND PLUMBING: These rubber shims can absorb vibrations and silence rattling tubing. Also, for leveling toilets and other plumbing applications. Trim to your desired size to secure wobbly or tilting installations.
- USA-MADE, SECURE DESIGN: Made in the USA, these tapered leveling shims feature interlocking ridges for a durable, non-slip grip. Stack them for a customizable height, and they can fit in any tight space.
- MUST-HAVE TOOL FOR HANDYMEN: Wobble Wedges are a must-have for anyone in home maintenance. For plumbers, handymen, and DIYers, they provide excellent leveling solutions for all surfaces, indoors or out.
Rank #3
ZZJMCH 12 Pack White Multi Purpose Furniture Plastic Shims for Leveling Extreme Weight Capacity Wedges Easy to Snap Cut-to-fit Size Leveler for Toilet Shims, Doors, Windows, Sheds, Table
- Multi Purpose Furniture Plastic Shims Adjustable size: 3.86 x 0.31 inch/ 10 x 0.8 cm, White, (12 Pcs) .
- Furniture Plastic Shims Use to stabilize and level various objects. Great for leveling bookcases, Toilet, tables, doors, windows, plumbing fixtures, cabinets, playhouses, sheds, deck & mailbox posts a breeze.
- Plastic Shims so you can break it at will and place it where you want to put it according to actual needs to reduce the exposed part and keep your home beautiful.
- Multi Purpose Furniture Plastic Shims can be Stackabled one by one, if you your interspace is too big you can use two or three to stackable together.
- Multi Purpose Furniture Plastic Shims Tasteless and safe: this shed leveling kit is made of plastic material, safe, reliable, tasteless, can be applied with confidence; Textured design helps stabilize and level various objects, making life faster and easier.
Rank #2
Wobble Wedge Flexible Plastic Shims, Leveling Wedges, Clear, 30-Pack
- HOME IMPROVEMENT OR DIY-ERS: Our flexible clear plastic shims for leveling are versatile wedge tools that can be used to fix things around the house like a professional! These spacers work as a stabilizer for an uneven table, bed frame, bookshelf, dresser, etc.
- EVERYDAY USE: Our flexible clear wedges are ideal for leveling furniture while protecting wood and ceramic floors. Stabilize uneven bases of furniture, level large kitchen equipment, and fix wobbly tables. Easily level out your shelves and fix home furniture.
- PLUMBING FIXER & TOILET SHIM: The soft rubber spacers are flexible and can fit in small spaces to absorb vibrations and silence a rattling water pipe. This leveling tool also fixes a tilting or wobbly toilet. You can trim the plastic wedges so it will always be a perfect fit.
- MADE IN USA - MODULAR DESIGN: Precision engineered tapered leveling plastic shims feature interlocking ridges for a non-slip grip on both sides. You can securely stack these spacers to fit and level any space. The wedge is roughly 1.92" x 1.11" x .25" with a 6.45º angle.
- ESSENTIAL LEVELING TOOL: These shims and wedges for leveling should be in the tool box of every plumber and handyman. Wobble Wedges blend seamlessly into any environment, and can be easily cut or trimmed for a perfect fit.
- Dry-fit the toilet. Set the bowl in position without the seal and check whether the base sits level. Identify the gaps that need support and position the shims there. Oatey’s replacement guide advises using shims if the bowl is not level.
- Lift the toilet while leaving the shims positioned. Install the wax seal according to its instructions. Oatey’s wax-ring guide describes dry-fitting and shimming before removing the bowl to install the seal.
- Set the bowl onto the seal. Lower it into place without rocking it back and forth. Oatey recommends setting it down with a small twist and no rocking so the seal is not disturbed.
- Secure the toilet carefully. Tighten the mounting bolts enough to hold the bowl stable, following the toilet manufacturer’s instructions. Do not overtighten: excessive force can crack or damage the bowl.
- Check the seal before finishing. Test for leaks before caulking around the base. Once the toilet is stable and the seal has been checked, trim any shim material protruding beyond the base, if needed, using an appropriate tool.
When shims are not the solution
- The toilet still rocks: Reassess the fit and the installation instead of stacking wedges indefinitely. Persistent movement can point to a problem beyond an uneven floor.
- There is water at the base: Stop and diagnose the seal and flange. Shims do not make a failed seal watertight.
- The flange is damaged or incorrectly positioned: Address the flange as a separate plumbing repair. Oatey notes that a flange extender may be used when a flange is below the finished floor; that is not the same job as leveling the bowl with shims.
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.
