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Mylar bags are only as good as their seal. A wrinkle, a gap, or a seal line that was too cool lets oxygen creep back in, and your oxygen absorber gives out long before your rice or beans do. Our guide to vacuum sealing rice, flour and dry goods covers what to pack and how long it keeps. A clothes iron works for a handful of bags, but if you are packing a bucket's worth of food, you want a sealer that makes the same flat, wide seal every time.
When choosing a heat sealer for Mylar bags, three specs matter most: seal width (5 mm beats 2 mm on thick foil laminates), rated material thickness (it must exceed your bag's mil rating), and seal length (12 in. covers gallon bags in one pass). If you also want the air out, a chamber vacuum sealer does both jobs at once.
Our top picks at a glance
Quick picks
- Best Overall: AIE-305 Impulse Hand Sealer (12 in. x 5 mm). Best for most home preppers sealing gallon Mylar bags.
- Best for Big Batches: AIE-305HIM Magnetic Hold Impulse Sealer. Best for long sessions where you want the sealer to hold and time each seal for you.
- Best Compact: AIE-205 Impulse Hand Sealer (8 in. x 5 mm). Best for quart bags and small kitchens.
- Best Vacuum + Seal for Mylar: VacMaster VP210. Best for people who want to pull a vacuum and seal Mylar in one step.
- Best Chamber Sealer for Hunters: LEM MaxVac Pro. Best for processors who also seal Mylar for dry storage.
- Best Bags to Pair With It: Wallaby 1-Gallon Mylar Bundle. Best for starting from scratch with bags and absorbers in one box.
Heat sealer for Mylar bags: comparison
| Product | Best for | Type | Seal length | Seal width | Max material | Power | Amazon |
|---|---|---|---|---|---|---|---|
| AIE-305 | Gallon bags | Impulse, hand-operated | 12 in. | 5 mm | 8 mil | 850 W | Check price |
| AIE-305HIM | Batches | Impulse, magnetic hold, dual timers | 12 in. | 5 mm | 8 mil | 850 W | See options |
| AIE-205 | Quart bags | Impulse, hand-operated | 8 in. | 5 mm | 8 mil | 600 W | See options |
| VacMaster VP210 | Vacuum + seal | Chamber, dry pump | 10.25 in. bar | Double wire | Mylar to 7 mil | Not listed here | Check price |
| LEM MaxVac Pro | Vacuum + seal | Chamber | Bags up to 11 in. wide | Not listed | 7 mil LEM Mylar | Not listed here | Check price |
AIE specs come from distributor spec sheets (Hillas) and AIE's Amazon listings; VacMaster and LEM specs come from the makers' listings. An impulse sealer only heats while the arm is down, so wattage is a peak figure, not a continuous draw.
The best heat sealers for Mylar bags, reviewed
1. AIE-305 Impulse Hand Sealer: Best Overall
Who it's for: home preppers and freeze-dryer owners who seal gallon Mylar bags in batches of 10 to 50.
American International Electric (AIE) makes a full line of US-warranted impulse sealers, and the AIE-305 is the model we would put in most pantries. Its 12 in. seal length closes a standard 10 x 14 in. gallon Mylar bag in one press, and the 5 mm seal width lays down a band wide enough to forgive small wrinkles. Distributor spec sheets list it for material up to 8 mil and 850 W, and AIE lists Mylar among the films it seals.
Impulse sealers are simple: a nichrome element under a PTFE (Teflon) cover heats only while you hold the arm down, then cools while you keep pressure on, so there is no warm-up and nothing hot left sitting on the counter. If you are deciding between this and a vacuum machine, see impulse sealer vs vacuum sealer. AIE ships its hand sealers with spare heating elements and PTFE covers, which are the parts that wear out. One caution from the Amazon listing: its voltage field has shown 230 V, while AIE's standard units are 110 V, so confirm the listing before you order.
Pros
- 12 in. seal length handles gallon bags in one pass
- 5 mm seal rated for material up to 8 mil
- No warm-up; heats only during the seal
- Spare elements and PTFE covers included, per AIE's distributors
Cons
- Hand pressure varies between users; you must hold the arm through the cooling phase
- No vacuum; you rely on oxygen absorbers
- Check the listing's voltage before buying
AIE-305 Impulse Hand Sealer, 12 in. x 5 mm
by American International Electric
2. AIE-305HIM Magnetic Hold Impulse Sealer: Best for Big Batches
Who it's for: anyone who seals Mylar by the case, such as a freeze-dryer owner clearing trays every few days.
The HIM version keeps the AIE-305's 12 in. length, 5 mm width, 8 mil rating and 850 W, then automates the part that most often goes wrong. A built-in magnet holds the sealing arm down during heating and releases it automatically when the cooling cycle ends, and there are dual timers, one for heat and one for cooling. That means every bag gets the same pressure and the same cool-down, which is what makes a seal reliable over years of storage.
You pay for that consistency: it sits in a higher price tier than the plain hand sealer and is heavier. If you seal a dozen bags a year, it is overkill. If you seal a hundred, the hands-free cooling time alone is worth it, because you can load the next bag while the magnet holds the last one.
Pros
- Magnet holds and releases the arm automatically
- Separate heat and cooling timers for repeatable seals
- Same 12 in. x 5 mm, 8 mil capacity as the AIE-305
Cons
- Premium price tier for an impulse sealer
- Heavier than the hand-only model
AIE-305HIM Magnetic Hold Impulse Sealer, 12 in. x 5 mm
by American International Electric
Currently unavailable on Amazon
3. AIE-205 Impulse Hand Sealer: Best Compact
Who it's for: people who store in quart or smaller Mylar bags, and anyone short on counter space.
The AIE-205 is the 8 in. version of the same design. It keeps the 5 mm seal width and the 8 mil material rating, and distributor sheets list it at 600 W. Eight inches covers quart and pint bags in a single press. You can seal a gallon bag with two overlapping presses, but every overlap is a place for a gap, so if gallon bags are your main size, buy the 12 in. model.
AIE also sells an 8 in. 2 mm model (AIE-200), rated for material up to 6 mil. For thick Mylar, the 5 mm AIE-205 is the better match.
Pros
- Small footprint; easy to store
- 5 mm seal rated to 8 mil
- Lower price tier than the 12 in. models
Cons
- 8 in. length is short for gallon bags
- Hand-held cooling like the AIE-305
AIE-205 Impulse Hand Sealer, 8 in. x 5 mm
by American International Electric
Currently unavailable on Amazon
4. VacMaster VP210: Best Vacuum + Seal for Mylar
Who it's for: people who want both: everyday meat and sous vide sealing, plus Mylar for the pantry.
A chamber vacuum sealer evacuates the whole chamber, bag included, so smooth Mylar works without textured channels. VacMaster says the VP210's double seal wire handles 3, 4 and 5 mil pouches and Mylar up to 7 mil, and its 11.25 x 15.25 x 5 in. chamber is deep enough for a bag of beans to stand partly upright. Pouches top out at 10 x 13 in., and the pump is dry, so there is no oil to change.
The trade-offs are size (72 lb) and the 10.25 in. bar, which cannot close a 10 x 14 in. Mylar bag in one seal if the opening is wider than the bar. For full gallon Mylar, an impulse sealer is still simpler. See our VacMaster VP210 vs VP215 comparison for the full specs.
Pros
- Vacuums and seals smooth Mylar in one step
- Rated for Mylar up to 7 mil
- Deep 5 in. chamber, dry pump
Cons
- 72 lb and a premium price tier
- Bar too short for the widest Mylar bags
VacMaster VP210 Chamber Vacuum Sealer
by VacMaster
5. LEM MaxVac Pro: Best Chamber Sealer for Hunters
Who it's for: hunters and anglers who already process meat and want to put dry goods into Mylar with the same machine.
LEM lists the MaxVac Pro chamber at 11.24 x 11.81 x 3.93 in. inside, with bags up to 11 in. wide, and LEM sells its own 7 mil MaxVac Pro Mylar bags for it. The 3.93 in. chamber height limits how full a bag can be, so it suits 8 x 10 in. Mylar better than tall gallon bags. Thick film may need seal time near the top of the range. Our Mylar vacuum seal bags guide covers LEM's Mylar line.
Pros
- Vacuums smooth Mylar
- LEM makes matching 7 mil Mylar bags
- Doubles as a game-processing sealer
Cons
- Shallow chamber for tall bags
- Thick Mylar may need longer seal time
6. Wallaby 1-Gallon Mylar Bundle: Best Bags to Pair With It
Who it's for: first-timers buying a sealer and bags at the same time.
A sealer needs good film. Wallaby's 75-bag bundle includes 10 x 14 in. gallon bags at 5 mil per side, 80 oxygen absorbers rated at 400 cc each (packed in sets of 10) and 80 labels. Wallaby says the bags can be closed with a heat sealer, an impulse sealer or a clothes iron on medium. At 10 x 14 in., they are the reason a 12 in. sealer is worth having.
Pros
- Bags, absorbers and labels in one box
- Gallon size suits rice, beans and freeze-dried meals
- Works with impulse sealers or an iron
Cons
- Absorbers must be used quickly once the pack is opened
- Gallon bags need a 12 in. sealer for a one-pass seal
Wallaby 1-Gallon Mylar Bag Bundle with Oxygen Absorbers
by Wallaby
Currently unavailable on Amazon
Buying guide: how to choose a heat sealer for Mylar bags
Impulse, constant heat, iron or vacuum?
- Impulse sealers heat a wire only while the arm is closed. They are cheap to run, safe to leave plugged in, and make a consistent band seal. This is the standard tool for Mylar.
- Constant-heat sealers stay hot and are built for very thick or gusseted bags. They cost more and take care to use safely.
- A clothes iron or hair straightener works for a few bags; Wallaby lists both. Pressure and heat are uneven, so check every seal.
- Chamber vacuum sealers remove air and seal in one step. They are the right choice only if you will also use them for meat, soups and sous vide. Our chamber vacuum sealer bags guide covers which pouches suit chamber machines.
Seal width: 2 mm or 5 mm?
AIE rates its 2 mm hand sealers for material up to 6 mil and its 5 mm sealers for up to 8 mil. The food-storage Mylar bags we cover run from 5 mil per side (Wallaby) to 7 mil (LEM MaxVac Pro), so a 5 mm sealer gives you headroom. A wider seal also tolerates a small wrinkle that would leak through a 2 mm line.
Seal length
Match the sealer to your largest common bag. Gallon Mylar is usually 10 x 14 in., so a 12 in. sealer closes it in one pass. Quart bags fit an 8 in. sealer. For 5-gallon bucket liners (20 in. wide or more), make two overlapping seals or use a household iron along the top, then check the overlap carefully.
Timer control
Every impulse sealer has a heat dial or timer. Thick foil laminates need more time than thin poly. Start low on a scrap strip cut from the top of a bag, raise the setting one step at a time, and stop when the seal is flat, fully fused across the width, and does not peel when you tug it. A burnt, shriveled seal means too much heat.
Replacement parts
The heating element and its PTFE cover wear with use. AIE ships spare elements and covers with its hand sealers. Whatever brand you buy, make sure replacement elements are sold for that exact model and length.
How to heat seal a Mylar bag, step by step
- Fill with truly dry food. Mylar storage is for low-moisture foods such as white rice, dried beans, wheat, oats and freeze-dried meals.
- Wipe the seal area. Dust from flour or powdered milk in the seal zone is the most common cause of a weak seal.
- Add the oxygen absorber last, sized for the bag, and seal within minutes.
- Press out excess air by hand, or vacuum it if you are using a chamber sealer.
- Seal about 1 in. below the top edge, so you can cut it open and reseal later.
- Hold pressure through the cooling phase. Lifting the arm early is the main cause of failed seals on a hand impulse sealer.
- Inspect and label. Check the seal across its full width, then write the contents and date on the bag.
For smaller amounts of the same dry foods, see how to vacuum seal mason jars or compare mason jar vacuum sealers.
Food safety: what a good seal can and cannot do
A heat seal and an oxygen absorber protect dry food from oxygen, moisture and insects. They do not make moist food shelf-stable. Clemson Cooperative Extension (HGIC 3865) warns that Clostridium botulinum grows at room temperature in low-oxygen packages, and that vacuum packaging is not a substitute for safely processing perishable foods meant for room-temperature storage. Never put moist or low-acid foods, such as cooked meals, fresh vegetables or meat, into Mylar at room temperature. Those need a pressure canner with a USDA-tested process or the freezer. Our vacuum sealing vs canning guide explains the difference.
How we chose
We did not test these sealers. We compared published specs from AIE's distributor spec sheets and Amazon listings, VacMaster's and LEM's product listings, and Wallaby's bag listing, and we weighed them against the bag thicknesses common in food-storage Mylar. We favored brands with long-running models and replaceable parts, and we left out specs we could not confirm.
FAQ
What kind of heat sealer do you need for Mylar bags?
An impulse sealer with a 5 mm seal width rated for at least the thickness of your bags is the most reliable home tool. AIE's 5 mm models are rated for material up to 8 mil, which covers the 5 to 7 mil food-storage Mylar bags we recommend. A chamber vacuum sealer also works and removes the air at the same time.
Can you seal Mylar bags with an iron or hair straightener?
Yes, and Wallaby lists both as options for its bags. They work for a few bags, but heat and pressure are uneven, so seals can wrinkle or leave gaps. An impulse sealer gives the same seal every time, which matters when you are sealing dozens of bags for long-term storage.
Will a FoodSaver seal Mylar bags?
It can heat-seal them, but it cannot vacuum smooth Mylar because there are no air channels. LEM says its smooth 7 mil Mylar bags can be sealed but not vacuum-sealed on external machines. Use textured Mylar bags for vacuum sealing on a FoodSaver-style machine, or use oxygen absorbers and seal with an impulse sealer.
Is a 2 mm or 5 mm seal better for Mylar?
A 5 mm seal is the safer choice for thick foil laminates. AIE rates its 2 mm hand sealers for material up to 6 mil and its 5 mm sealers for up to 8 mil, so the wider seal covers more bag thicknesses and gives you a wider band of fused film.
Do you need a vacuum sealer for Mylar bags?
No. The standard method is dry food, the right size oxygen absorber, and a heat seal. Vacuum sealing removes more air up front, but an oxygen absorber does the long-term work of pulling the remaining oxygen out after the bag is sealed.
Verdict
For most people, the AIE-305 is the heat sealer for Mylar bags to buy: 12 in. long, 5 mm wide and rated to 8 mil, with spare parts in the box. Step up to the AIE-305HIM if you seal in volume and want timed, hands-free cooling, or choose the AIE-205 for quart bags. If you also want a vacuum, a chamber machine like the VacMaster VP210 seals smooth Mylar too; compare more in our best chamber vacuum sealers.