Top Knot 45 Gallon Can Liners — 1.5 Mil Low-Density, Black, 40 x 46 in, 100 Count, Made in USA

As an Amazon Associate, WC Safety earns from qualifying purchases. This does not affect the price you pay.

What the Top Knot 45 Gallon Can Liners Are

They are 1.5-mil, black, low-density (LLDPE/LDPE) trash bags measuring 40 by 46 inches, sold 100 to a case and made in the USA. The key spec is the 1.5-mil rating: a mil rating means low-density film, which stretches around edges and resists punctures and tears rather than splitting open. That makes them the right liner for heavy, sharp or irregular waste — construction debris, cans, glass, wood, tear-off — the kind that defeats a thin bag.

The flat 40 by 46 inch size suits roughly 40 to 44 gallon round or tall containers. Because a mil-rated bag is low-density, it behaves differently from a micron-rated high-density liner, which is thinner and better for light, smooth, wet waste — a same-capacity high-density option is the Typlastics 40-45 gallon liner. To pick correctly, see our trash-can-liner guide and browse the full can liners range.

Density-to-Waste Match: Why 1.5-Mil Low-Density

The single mistake behind most liner blowouts is matching the gallon number instead of the density to the waste stream. There are two families. Low-density (LLDPE/LDPE) film is rated in mils — like this 1.5-mil Top Knot bag — and it stretches: it wraps around a jagged edge and resists a puncture spreading into a tear. That is what you want for sharp, heavy, irregular waste. High-density (HDPE) film is rated in microns, is thinner and crisper, gives more bags per case, and suits light, smooth, wet waste — paper, food scraps, restroom trash — but it zippers open if a sharp edge punctures it.

So the 1.5-mil low-density Top Knot liner is built for the heavier end: jobsite and demolition debris, back-of-house, and any can that regularly sees edges and weight. For the light end of the same 40-to-45-gallon capacity, a micron-rated high-density liner is cheaper per bag; for even heavier or sharper loads, step up to a heavier low-density bag such as the 2.1-mil 55-60 gallon, or the smaller-can 1.6-mil 33 gallon. Our mil-thickness reference and the facility supplies range walk through the choice.

Pros & Cons

Specifications

Related Guides

Related Products

Frequently Asked Questions

What does 1.5 mil mean, and is this low- or high-density?

Mil is a measure of film thickness, and a mil rating tells you the bag is low-density (LLDPE/LDPE) film. At 1.5 mil these Top Knot liners are a heavy low-density gauge: the film stretches around edges and resists punctures and tears rather than splitting. Low-density is what you want for sharp or heavy waste. High-density (HDPE) liners are rated in microns instead and behave differently — thinner, crisper, best for light and smooth waste.

What kind of waste are these for?

Heavy, sharp or irregular waste — the kind that defeats a thin bag. Think construction and demolition debris, broken-down cardboard, cans, glass, wood offcuts and tear-off, plus heavy wet facility waste. The low-density film stretches around a jagged edge instead of zippering open at the puncture, which is exactly what a 1.5-mil gauge is for. For light, routine office or restroom waste, a thinner or high-density liner is more economical.

What container sizes does the 40 x 46 inch bag fit?

The flat 40 by 46 inch size suits roughly 40 to 44 gallon round or tall containers — the common large round can. As a rule of thumb, the bag width should be about half the can's circumference and the length should cover the height plus the bottom plus a few inches of overhang. Can shapes vary, so measure your container using our can-size reference before standardising a case rather than trusting the gallon number alone.

Are they strong enough for construction debris?

For most jobsite and demolition waste, yes — a 1.5-mil low-density bag handles edges and moderate demolition weight like lumber, drywall offcuts, glass and metal tear-off far better than a routine facility liner. Be realistic at the extreme end: very heavy or very sharp loads can still defeat any single bag, and for those a 2-to-3-mil contractor bag or double-bagging is the honest answer. Match the gauge to the worst waste in the stream.

Low-density vs high-density — which should I use?

Match the density to the waste, not the gallon number. Low-density (mil-rated, like this 1.5-mil bag) stretches and resists punctures, so it suits sharp, heavy, irregular waste. High-density (micron-rated) is thinner and crisper and gives more bags per case, so it suits light, smooth, wet waste — paper, food scraps, restroom trash. Running the wrong one causes blowouts or wasted money. A same-size high-density option like the Typlastics 40-45 gallon liner covers the light end.

Why black instead of clear?

Black conceals contents, which is what you want for general and confidential waste in public or office settings — nobody sees what is in the can. Clear liners are chosen where the contents need to be visible: recycling sortation, or security and safety checks that require seeing inside the bag. For routine mixed waste in a facility, black is the standard, and these Top Knot liners are black.

How many come in a case, and where are they made?

Each case holds 100 liners, and they are made in the USA. A 100-count case of 45-gallon bags is a genuine facility quantity that stocks a custodial route, a jobsite or a back-of-house for a good while. Buying by the case is how most operations standardise on one liner and keep the store cupboard supplied without constant reordering.

Will they fit a Rubbermaid Brute or a Slim Jim?

The 40 by 46 inch size suits a large round can in the 40-to-44-gallon range, such as a 44-gallon round Brute-style container. It is not the right liner for a slim rectangular can like a 23-gallon Slim Jim, which takes a narrower, shorter bag. Always match the liner to the can's actual dimensions — a round-can liner bunches awkwardly in a slim can and vice versa. Measure before you commit to a case.

How do I load one without splitting the seam?

Seat the bag fully into the can so the bottom sits flat and the top cuffs over the rim, then avoid overfilling past the can's capacity — an overloaded bag stresses the seam and the film. Watch protruding sharp edges when you lift, and support the bottom on a heavy load rather than dragging it. Most seam failures come from overfilling or a snag on lifting, not the film itself, so load and lift with that in mind.

Are these a recycled or eco liner?

The listing describes them as made in the USA but does not claim recycled content or an environmental certification, so we do not state one — they are a durable low-density film liner. If a recycled-content or certified-green liner is a procurement requirement for your facility, choose a product that documents that specific spec on the case; we will not attach an eco claim to a bag that does not carry one.

Can I use them for liquids or chemical waste?

No. A can liner is for general solid waste, not a container for free liquids, chemical waste or hazardous material — the film is not sealed containment and can leak or react. For chemical or hazardous waste, use the proper sealed container and follow your facility's disposal procedure, and wear the right PPE when handling it. Keep these liners to the solid trash they are built for.

What are the Top Knot 45 gallon liners not?

They are not high-density (HDPE) micron-rated liners, not puncture-proof, not a chemical, hazardous or liquid-waste container, and not a guaranteed fit for a specific branded can. They are a 1.5-mil low-density bag for heavy, sharp general waste in a 40-to-44-gallon round can. Confirm your can's dimensions and your worst waste stream, and if the load is extreme, step up to a 2-to-3-mil bag from our can liners range.