When it comes to toilet, vanity, sink, or general fixture installation, few items are as essential yet overlooked as plastic shims. These simple, versatile tools make the difference between an installation that wobbles, shifts, or leaks over time — and one that stays level, secure, and professional. At Dupont Kitchen & Bath, we carry Plastic Shims in both soft and hard plastic, ensuring you always have the right material for the job, whether you’re a contractor or a DIY renovator.
Each shim measures 1¼" x 2" with a ¼" thickness, a standard size that provides excellent stability for plumbing and fixture support. They are conveniently packaged in bags of 10, making them an affordable and practical addition to any trade toolkit or homeowner repair kit.
Soft plastic shims are designed to compress slightly under weight, giving you flexibility for fine adjustments when leveling toilets, vanities, and cabinetry. They’re easy to trim with a utility knife, ensuring a perfect fit in tight or uneven spaces. For installers working on older homes where floors are rarely level, these soft shims are indispensable. They provide a cushioned yet secure support that prevents rocking or shifting without damaging tile, laminate, or wood flooring.
Hard plastic shims, on the other hand, are made for jobs that demand strength and long-term stability. Unlike wood shims, they will not rot, absorb moisture, or compress over time. They’re ideal for heavy-duty fixture support and are especially useful when installing toilets on tile, concrete, or uneven subfloors where firmness and durability are key. Contractors often choose hard shims when they want confidence that the installation will last for decades without requiring adjustment.
Plastic shims are small but mighty, with countless applications in bathroom and kitchen work:
Toilet installation: Prevent rocking and ensure a tight wax or wax-free seal.
Vanity and cabinet leveling: Achieve precision alignment even on sloped or uneven floors.
Sink and pedestal support: Add discreet reinforcement beneath basins.
General fixture alignment: Use wherever balance, spacing, or subtle adjustment is needed.
These shims are also useful beyond plumbing — they’re commonly used in flooring, window installation, and furniture stabilization, proving their versatility across trades.
Unlike wax or cardboard spacers, plastic shims will not degrade over time. They are resistant to water, mold, and corrosion, making them particularly well-suited for humid environments such as bathrooms and kitchens. Contractors trust them not only because they save time during installation but also because they help prevent costly callbacks due to uneven fixtures or leaks caused by improper sealing.
We carefully select our installation essentials to meet the needs of both contractors and homeowners. Our bags of 10 plastic shims provide great value and convenience, ensuring you always have extras on hand for the next project. Whether you need soft plastic for easy trimming and cushioning or hard plastic for rugged durability, you’ll find that our shims are a step above generic alternatives.
By offering them in clear packaging and professional-grade quality, we help contractors stock their toolkits with confidence — and give DIY homeowners the right products to complete projects successfully the first time.
Available in soft or hard plastic for versatility.
Standard 1¼" x 2" x ¼" size fits most toilet and fixture installations.
Bags of 10 for convenience and value.
Soft plastic shims are flexible and easy to trim.
Hard plastic shims are rigid, durable, and long-lasting.
Essential for toilet, vanity, sink, and cabinet installations.
Moisture-resistant and won’t rot or compress over time.
A must-have for both contractors and homeowners tackling bathroom or kitchen renovations.
When it comes to getting an installation right, every detail matters — and these shims are the small but critical detail that ensures a professional finish.
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