An I-bar sealer makes one straight seal per stroke, so each package takes two or more strokes. An L-bar sealer seals the open side and the end of the film in one stroke. I-bar kits list from $309 to $862 with a heat gun, and Uline rates its kits at 1 to 2 packages per minute. Tabletop L-bar sealers list from $859 to $2,267 without a heat source, and Uline rates its H-2378 at 6 to 8 packages per minute at the sealing step.
Neither one shrinks the film. Both need a heat gun, a hooded chamber, or a shrink tunnel.
I-bar vs. L-bar at a glance
| I-bar kit | Tabletop L-bar sealer | |
|---|---|---|
| Seal per stroke | One straight line | Two lines that meet at a right angle |
| Strokes per package | Two or more. The operator moves the package between seals. | One, after the first end seal on a new roll |
| Rated speed | 1 to 2 packages per minute (Uline kits) | 6 to 8 packages per minute (Uline H-2378), not counting shrinking |
| List price | $309 to $862 | $859 to $2,267 |
| Price includes | Bar sealer, film rack, heat gun, and often starter film | Sealer and film cradle. Film and a heat source cost extra. |
| Sizes in our research | 13 to 40 in. bars | 13 × 13 in. to 24 × 32 in. seal areas |
| Good fit | A few packages a day, tests, occasional batches | Daily small-batch production |
Speeds are seller ratings. Prices were seen on seller websites October 1, 2026, before freight and tax. Sources are in the sections below and in the cost guide.
How each one seals
Both machines run centerfold film. Centerfold film is one sheet folded in half along its length, so the fold closes one side of the package. Uline’s shrink film guide says centerfold film “must be sealed on 3 sides around the product before shrinking.”
I-bar. An I-bar sealer is one straight heated bar on a table with a film roll behind it. Each stroke makes one seal and trims the film. The operator seals one edge, turns or slides the package, and seals the next edge.
L-bar. An L-bar sealer has two bars joined at a corner. One stroke seals the open side and the trailing end and cuts the package from the roll. The cut also leaves an end seal for the next bag. After the first seal on a new roll, each package takes one stroke. Uline’s H-2378 listing gives two 18-inch sealing sides.
| Question | I-bar system | Hand L-bar system |
|---|---|---|
| Centerfold workflow | Place and seal each open edge in a separate step | Place the product inside the L and close once for both open edges |
| Package fit | The bar must cover each seal line. Allow room to reposition. | Product and film must fit the L-shaped seal area together. |
| Shrinking | The heat gun in the kit, or a tunnel | Separate heat gun or tunnel unless part of a combo |
Neither package is airtight. Uline says its I-bar system “will not create an airtight seal”. Shrink packages are also vented so air can escape during shrinking.
A straight impulse bag sealer is not always an I-bar shrink sealer. It may not cut centerfold film or hold a roll. Check the film it is meant for, how it cuts, and whether it comes with a roll holder.
Speed
Uline rates its I-bar kits at 1 to 2 packages per minute. It rates the H-2378 tabletop L-bar at 6 to 8 packages per minute. The L-bar rating covers sealing only. With either machine, shrinking each package with a heat gun takes extra time.
Time the whole batch: placing, sealing, shrinking, checking, and handling. The heat gun may take most of the time. Then a faster sealer only builds a pile of unshrunk bags, not more finished packages.
Here is an example. Say your own batch timing shows 30 seconds of total labor per finished package with an I-bar. With an L-bar it shows 22 seconds. The saving is 8 seconds × 1,000 packages ÷ 3,600 = 2.22 hours per 1,000 packages. At an assumed labor cost of $25 an hour with overhead, that is about $55.56 of labor time. This is an illustration. It is not a tested rate or a promised cash saving. Put your measured saving and the full upgrade cost into the payback calculation.
Price
| Machine | Type | Size | Price | Includes |
|---|---|---|---|---|
| AIE-2013I | I-bar kit | 13 in. bar | $309 on sale | Heat gun, film rack, 500 ft of PVC film |
| Uline H-5107 Economy | I-bar kit | 20 in. bar | $315 | Film dispenser, bar sealer with cutter, heat gun |
| Uline H-8254G | I-bar kit | 13 in. bar | $440 | 100 ft of 75 gauge PVC film, heat gun |
| Uline H-8255G | I-bar kit | 18 in. bar | $495 | 100 ft of 75 gauge PVC film, heat gun |
| US Packaging & Wrapping 40 in. system | I-bar kit | 40 in. bar | $862 | Timer, heat gun, film rack, film |
| AIE 1313L | Tabletop L-bar | 13 × 13 in. | $859 on sale | Sealer only |
| Uline H-2378 | Tabletop L-bar | 18 × 18 in. | $1,208 | Sealer only |
| US Packaging & Wrapping Deluxe | Tabletop L-bar | 24 × 32 in. | $2,267 | Confirm with the seller |
The sealer price is not the whole L-bar budget. With a heat gun and a roll of polyolefin film, our starter setups came to $1,063 for a 13 × 13 in. L-bar and $1,445 for the 18 × 18 in. Uline. Tabletop L-bar sealers are also heavy. Uline lists the H-2378 at 106 lb and ships it by motor freight.
Package size and film
I-bar. Every seal line must fit the bar with room to spare. Kits in our research come with 13 to 40 in. bars. A larger item needs a longer bar or more strokes.
L-bar. The product and the film must fit inside the L together, and the machine has a height limit. Don’t judge package size from the bar size alone. Use the model’s manual. The H-2378 manual gives that model’s product clearance and film limits.
Film thickness. Uline’s H-8254G listing says the I-bar seals film up to 4 mil and works with “shrink bags, tubing or film.” The H-2378 manual rates that L-bar for film up to 100 gauge, which is 1 mil. These are two models, not a rule for each type. Check the film range before you buy either one.
Most I-bar kits ship with PVC film. If you plan to switch, see polyolefin vs. PVC shrink film. To size a roll, see how to size centerfold film.
Which to buy
Buy an I-bar kit for occasional batches, a few packages a day, or a test of shrink wrap before you spend more. It makes sense when purchase price matters more than extra handling.
Buy a tabletop L-bar sealer when repeated sealing strokes slow you down and you wrap most days. See manual L-bar sealers for models and what to check on the bench.
Look past both if shrinking is the slow step. A hooded chamber machine seals and shrinks in one cycle and lists from $3,199 to $6,995. A sealer and tunnel combo lists from $7,999. If your products are longer than any L-bar, compare L-bar sealers and side sealers.
Before buying either, measure your largest and smallest products. Confirm the film format in the buying guide.
Common questions
An I-bar sealer has one straight heated bar and makes one seal per stroke, so each package takes two or more strokes. An L-bar sealer has an L-shaped bar that seals the open side and the end of centerfold film in one stroke. Both only seal. You still need a heat gun or shrink tunnel to shrink the film.
At the sealing step, yes. Uline rates its I-bar kits at 1 to 2 packages per minute and its H-2378 tabletop L-bar sealer at 6 to 8 packages per minute. The L-bar rating does not count shrinking. If you shrink with a heat gun, that step may set your real output.
I-bar kits with a heat gun listed from $309 to $862. Tabletop L-bar sealers listed from $859 to $2,267 without film or a heat source. Prices were seen on seller websites October 1, 2026. See the full cost guide.
Both use centerfold shrink film, which is folded in half along its length. Check the widest roll and the thickest film each model accepts. Uline's H-8254G I-bar listing says it seals film up to 4 mil. Its H-2378 L-bar manual rates that sealer for film up to 100 gauge, which is 1 mil.
When repeated sealing strokes are the slow step in your batch. Time a whole batch first. If the heat gun takes most of the time, a faster sealer only builds a pile of unshrunk bags. In that case look at a hooded chamber or a shrink tunnel.