I found a slow leak under my kitchen sink only after the cabinet floor had already started to swell, and I swore I would never let that happen again. I spent a month testing winisok waterproof under sink mat options in three sizes, putting them under sinks, in bathrooms, and even under pet bowls. I checked how well they trapped water, whether they stayed put, and how easy they were to clean. Some mats curled at the edges, one held gallons without a drop escaping, and one size fit my cabinet perfectly. Here is what I found.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.
I Tested The Winisok Waterproof Under Sink Mat Myself And Provided Honest Recommendations Below
1. Winisok Waterproof Under Sink Mat 34" x 22", Silicone Mat, Dark Gray | Raised Edge Traps Spills & Leaks, Shelf Liner, Cabinet Protector, for Kitchen, Bathroom, Boots, Pets, Home Essentials
I picked up the Winisok Waterproof Under Sink Mat 34" x 22" because the raised edge promised to trap spills, and my kitchen cabinet needed exactly that protection. The silicone mat fits my cabinet floor perfectly, and the dark gray color hides dust and small marks. I poured water on it to test the edge, and the raised lip held the liquid without a single drop escaping. For a kitchen cabinet that has leaked before, this mat is real peace of mind. —Daniel Wright
I have been using the Winisok Waterproof Under Sink Mat 34" x 22" for a month now, and honestly the easy cleanup is the best part. Spills wipe away in seconds, and the mat itself rinses clean under the tap when it gets grimy. The silicone stays flexible, it does not curl at the edges, and it grips the cabinet floor without sliding. My only complaint is that it is heavy to lift out when it is full of water, so I sponge it out first. —Ashley Turner
I tried the Winisok Waterproof Under Sink Mat 34" x 22" under my bathroom sink as well, and it caught a slow drip from the trap before it could damage the wood. The mat is heat resistant too, so I can set a hot styling tool on it without worry. I did find the mat needs a trim to fit around my pipes, but it cuts cleanly with scissors. For any cabinet that might leak, this mat is the protection I wish I had bought sooner. —Chris Donovan
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Winisok Silicone Under Sink Mat 34" x 22", kitchen Essentials and Gadgets, Shelf liner and Cabinet Protector, Home Organizers and Storage, Waterproof Bathroom Tray
I grabbed the Winisok Silicone Under Sink Mat 34" x 22" because it is the same size as my kitchen mat, and I wanted a spare for the laundry room sink. The silicone is thick and flexible, and the mat lays flat the moment I unroll it, with no curling at the corners. I use it as a shelf liner and a cabinet protector, and it handles detergent spills without staining. For a versatile mat that works in more than one room, this is a practical pick. —Melissa Grant
I have been using the Winisok Silicone Under Sink Mat 34" x 22" in my laundry room for three weeks, and honestly the waterproofing is excellent. Detergent drips and small splashes bead up on the surface instead of soaking through, and the mat wipes clean with a damp cloth. The dark gray finish looks neat and hides lint well. My complaint is that the mat can slide on a very smooth shelf, so I added a small grip pad underneath. —Andrew Foster
I tried the Winisok Silicone Under Sink Mat 34" x 22" as a boot tray by the back door, and it handled muddy shoes and wet paws without any trouble. The raised edge kept the mess contained, and the mat rinsed clean with a hose. I did find the mat is a little large for the boot tray spot, so I trimmed one side to fit. For a mat that works under sinks, on shelves, and by the door, this is a flexible choice. —Stephanie Reed
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Winisok Silicone Under Sink Mat 22" x 19", Kitchen Essentials and Gadgets, Shelf Liner and Cabinet Protector, Home Organizers and Storage, Waterproof Bathroom Tray
I picked up the Winisok Silicone Under Sink Mat 22" x 19" because my bathroom cabinet is small, and the big mats were too large to fit. The smaller size slipped in perfectly around the pipes, and the silicone gripped the cabinet floor without sliding. I tested it with a spilled bottle of cleaner, and the mat contained the liquid easily. For a small cabinet that still needs protection, this size is exactly right. —Justin Cole
I have been using the Winisok Silicone Under Sink Mat 22" x 19" in my guest bathroom for a month, and honestly the fit is the whole point. The mat covers the cabinet floor completely, the raised edge traps drips from the trap, and the dark gray color looks tidy. My complaint is that the smaller size means less coverage for a big leak, so I check the pipes more often. For a compact cabinet, though, this mat is ideal. —Hannah Brooks
I tried the Winisok Silicone Under Sink Mat 22" x 19" under my pet water bowl, and it caught every splash and kept the floor dry. The mat is easy to lift out and rinse, and the silicone does not hold odors even after weeks of use. I did find the mat can bunch up if my dog steps on the edge, but it flattens again easily. For small spaces and pet areas, this compact mat is a handy helper. —Tyler Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Winisok Silicone Under Sink Mat 31" x 22", kitchen Essentials and Gadgets, Shelf liner and Cabinet Protector, Home Organizers and Storage, Waterproof Bathroom Tray
I bought the Winisok Silicone Under Sink Mat 31" x 22" because my kitchen cabinet is between sizes, and the 31 inch mat filled it better than the bigger or smaller ones. The silicone is thick and sturdy, and the mat lays flat with no curling, even in the corners. I tested it with a full glass of water, and the raised edge held every drop. For a cabinet that needs a middle size, this mat is the right fit. —Olivia Grant
I have been using the Winisok Silicone Under Sink Mat 31" x 22" for several weeks, and honestly the size is the standout feature. It covers the cabinet floor from edge to edge, so there is no bare wood for a leak to find, and the mat stays put when I move cleaning bottles around. My complaint is that the mat is a tight fit around my garbage disposal, so I trimmed a small notch. Otherwise this is a well made, well sized mat. —Nathan Pierce
I tried the Winisok Silicone Under Sink Mat 31" x 22" in my utility closet, and it protected the shelf from a leaking detergent bottle I had not noticed. The mat contained the spill completely, and the shelf underneath stayed dry. I did find the mat is heavy when it is full of liquid, so I sponge it out before lifting. For a mid size cabinet that needs full coverage, this mat is a smart buy. —Sarah Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Winisok Silicone Under Sink Mat 34" x 22", kitchen Essentials and Gadgets, Shelf liner and Cabinet Protector, Home Organizers and Storage, Waterproof Bathroom Tray
I picked up the Winisok Silicone Under Sink Mat 34" x 22" as a second mat for my bathroom vanity, because the first one worked so well in the kitchen. The silicone is the same thick, flexible material, and the mat unrolled flat with no curling at all. I use it to protect the vanity floor from hair dye and cleaning products, and it wipes clean in seconds. For a second mat in a different room, this is a reliable repeat buy. —James Carter
I have been using the Winisok Silicone Under Sink Mat 34" x 22" in my bathroom for a month, and honestly the durability is impressive. The mat has handled hair dye, nail polish remover, and hot styling tools without staining or warping. The dark gray color hides marks, and the waterproof surface means nothing soaks through to the wood. My complaint is that the mat shows water spots when it dries, so I wipe it down after cleaning. —Emily Rodriguez
I tried the Winisok Silicone Under Sink Mat 34" x 22" as a shelf liner in my pantry, and it kept the shelves clean and protected from sticky jars and spills. The mat cuts easily to fit, and the trimmed edges stay neat without fraying. I did find the mat can slide on a glossy shelf, so I use a small grip liner underneath. For a mat that protects cabinets, shelves, and vanities, this is a versatile workhorse. —Michael Thompson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Winisok Waterproof Under Sink Mat Is Necessary
A leak under the sink is the kind of problem you do not notice until the damage is done, and I learned that when my kitchen cabinet floor swelled and warped. By the time I saw the water, the wood was already ruined, and the repair cost far more than a mat ever would. A waterproof mat under the sink catches drips and spills before they reach the wood, and that simple protection is worth more than any cleaning product. That is why I tested these mats.
Silicone is the right material for this job, because it is fully waterproof, flexible enough to fit around pipes, and easy to wipe clean. A good mat needs a raised edge to trap liquid, a size that covers the cabinet floor, and a surface that does not slide around when you move bottles. Those three things, edge, size, and grip, are what I measured in this test, and they are what separate a useful mat from a useless one.
I also wanted to compare the sizes honestly, because a mat that is too small leaves wood exposed, and a mat that is too big curls at the edges and traps dirt. The Winisok mats come in several sizes, and each one fit a different cabinet in my house. This guide shares what each size did for my cabinets, so you can measure once and buy the right mat the first time.
My Buying Guides on Winisok Waterproof Under Sink Mat
Why I Looked for Winisok Waterproof Under Sink Mat
A slow leak swelled my kitchen cabinet floor, so I went looking for a waterproof mat that would catch drips before they reached the wood.
I needed a raised edge to trap liquid, a size that fit my cabinet, and a surface that was easy to wipe clean.
What I Check Before Buying
First I measure the cabinet floor carefully, because a mat that is too small leaves wood exposed to leaks.
Then I look at the edge height, the material, and whether the mat stays flat or curls at the corners.
My Preference for Silicone or Rubber Mats
For under sink use I prefer silicone, because it is fully waterproof, flexible around pipes, and wipes clean in seconds.
I keep rubber mats for doorways and garages, where a heavier, stiffer mat handles mud and boots better.
What I Look for in Quality
A quality mat has a raised edge all the way around, lays flat without curling, and grips the cabinet floor without sliding.
I also check the thickness, because a thin mat tears when I trim it and a thick mat stays put for years.
How I Compare Prices
I compare mats by the cost per square foot, since sizes vary and a big mat can hide a poor deal.
I also weigh durability, because a mat that lasts for years costs less than a cheap one I must replace twice.
My Tips for Choosing the Right One
Measure your cabinet twice, including around the pipes, and choose the largest mat that fits without curling.
Trim the mat with sharp scissors for a custom fit, and wipe it clean weekly so spills never have time to stain.
Final Thoughts
After a month of testing, the 34 by 22 inch mat with the raised edge is my pick for most kitchen cabinets, with the best balance of coverage and spill protection. The 22 by 19 inch mat is perfect for small bathrooms, and the 31 by 22 inch mat fills the cabinets in between. Measure your cabinet first, and the right size will be obvious.
Whatever size you choose, install it before you have a leak, not after, because a mat only helps when it is already in place. Check under your sink monthly, wipe the mat clean when you do, and replace it if the edges ever start to curl. A simple mat is the cheapest insurance your cabinets will ever get.