Tondiamo 70 Pcs Wall Insulation Gasket Rectangle Wall Plate Outlet Sealers White Outlet Insulation Foam Replacement Weatherproof Gasket Sealer Energy Saving for Electrical Plates Switch Covers

Why I tried these

Air sneaking through wall outlets is one of those small, constant annoyances that add up—especially in older or drafty homes. After feeling a consistent chill around switches on exterior walls (and watching incense smoke stream toward a couple of receptive outlets), I picked up the Tondiamo outlet gasket kit to see whether a low-cost, low-effort fix would make a real difference.

This set is a big pack of EVA foam inserts designed to sit behind your wall plates and seal the gap between the plate and the electrical box. You get a mix of 1-, 2-, and 3-gang gaskets with perforated cutouts for toggles, rockers/Decora, duplex receptacles, and decorator outlets, all in white. They’re about 3 mm thick, which is noticeably thicker than many generic options. I tested them across a mix of older duplex outlets, newer Decora switches, and a few two- and three-gang plates.

Installation and fit

I set aside an hour, turned off the relevant circuits at the panel, and worked room by room. The process is simple:

1) Remove the wall plate.

2) Choose the closest matching gasket.

3) Pop out the necessary cutouts.

4) Place the gasket against the wall, reinstall the plate, and snug the screws.

The perforations are well planned, but the material is dense, and a few of the tighter knockouts benefited from a light pass with a utility knife to avoid tearing. I’d recommend scoring the tabs instead of yanking them—especially for older duplex cutouts and multi-gang plates where you want a clean edge. On a handful of plates, I also had to clear small foam bridges where the mounting screw passes through. Not difficult, just a heads-up to keep a blade handy.

As for fit, the sizes in the kit (roughly 63×107 mm for single-gang, 108×109 mm for double, and 108×157 mm for triple) lined up well with US standard plates in my house. The 3 mm thickness compresses nicely under the plate, but it’s stout enough to seal irregular drywall edges around the box. If your drywall cutouts are especially rough, pairing these with an oversized plate will cover sins and still compress the foam for a tight seal.

One limitation: there are no dedicated four-gang pieces in this pack. If you’ve got a few 4-gang switch banks, you’ll need a different kit or to get creative with trimming.

Performance in use

I installed the kit on a mix of exterior wall outlets and switches, along with a few interior locations that felt drafty near an attic chase. Results were immediate and tactile: the “cold ring” you feel with the back of your hand around an unsealed outlet dropped substantially. The incense test showed significantly reduced air movement through the plate edges. It’s not a complete airtight barrier—nor should it be—but it closes the obvious path that plates and loose drywall transitions create.

Over a few days of colder weather, the rooms with multiple exterior outlets felt more even, with fewer localized cold spots. This is the kind of upgrade you feel more than measure unless you’re set up for blower door tests, but the difference at the outlet level is obvious. In summer, the same logic applies to keeping conditioned air inside.

Build quality and material

The EVA foam is dense, resilient, and consistent. Unlike ultra-thin gaskets that collapse into gaps and lose their shape, these maintain a firm interface with the wall and plate. That density is a double-edged sword: it’s better for sealing, but it means the perforations don’t always “tear clean” by hand. Again, a utility knife makes short work of it.

Thickness is enough to matter. I’ve used 1–2 mm foams in the past that barely changed the draft test. At 3 mm, this kit provides meaningful compression without over-stressing the plate. The plates sat flush in my installs; if yours don’t, check that the device screws are tight, then snug the plate screws gradually. Don’t crank them—overtightening can bow a plate and reduce the seal.

Compatibility and sizes

Between the included sizes and the perforated patterns, I covered every 1–3-gang plate in my place. The kit includes:

• Single-gang gaskets with knockouts for toggles, Decora, and duplex.
  
• Two- and three-gang gaskets with mix-and-match perforations for common combinations.

I’d still recommend counting your locations first, particularly how many two- and three-gang plates you have, so you don’t run short on those sizes. The kit is heavy on single-gang pieces, which matches most homes, but multi-gang runs can eat through the smaller count quickly.

Safety and code considerations

• Turn off power at the breaker and verify with a non-contact tester before removing plates.
  
• Don’t stuff foam into the electrical box; these gaskets are intended to sit under the wall plate only.
  
• If you encounter loose devices, damaged boxes, or crumbling drywall, address those issues first—gaskets aren’t a substitute for basic repairs.
  
• Leave clearance for GFCI test/reset buttons and any specialty devices.

Tips that made a difference

• Lightly score perforations with a utility knife for a clean punch-out, particularly on duplex patterns.
  
• For uneven drywall edges, combine a gasket with an oversized plate for a flawless look and better sealing pressure.
  
• Test the seal with an incense stick or a strip of tissue—great for finding the worst offenders before you begin.
  
• Keep a small cup for the punched-out foam bits; you’ll be less likely to lose screws among the scraps.

Where these make the most sense

If your home has noticeable drafts around plates—common on exterior walls, over uninsulated cavities, or in rooms above garages—these gaskets are a fast, high-return fix. Renters can use them too; the installation is reversible, leaves no marks, and hides behind the plate. In a brand-new, tightly sealed home, the gains will be smaller, but the cost is low enough that I’d still do exterior walls and any switch banks near attic or crawlspace chases.

Value

For the quantity you get, the price-per-opening is excellent. The set’s mix of sizes covers most households without needing multiple SKUs, and the thicker foam performs better than the ultra-thin options I’ve tried. If you need a lot of four-gang pieces, you’ll want an add-on pack; otherwise, this kit is a strong buy for whole-home coverage.

What I’d improve

• Add a few four-gang gaskets to the mix or offer a companion pack.
  
• Pre-cut screw holes a hair cleaner on certain patterns to reduce the need for a blade.
  
• Include a quick-start card with a perforation map—it’s intuitive after a couple, but the first few require a careful look.

The bottom line

The Tondiamo gasket set quietly does exactly what it’s supposed to do: it cuts down the obvious air pathways at outlets and switches with minimal time and tools. The denser, thicker foam makes a real difference over flimsy liners, the sizing works with standard US plates, and the kit’s assortment handled every 1–3-gang situation I had. Expect to use a utility knife for the cleanest perforations, and consider oversized plates if your drywall cutouts are rough.

Recommendation: I recommend this kit. It offers a noticeable reduction in drafts for very little effort and cost, the material quality is a step above ultra-thin alternatives, and the assortment is practical for whole-home use. If you have several four-gang plates, you’ll need supplemental gaskets, but for common configurations, this is an easy, effective upgrade that improves comfort and nudges energy efficiency in the right direction.