Yes—FoodSaver machines can heat-seal many mylar bags, but they can’t vacuum smooth mylar; use textured workarounds or an impulse sealer for airtight results.
You’re here to find out exactly what works when pairing a countertop FoodSaver with mylar. The goal is simple: shelf-stable storage with clean seals and no surprises. This guide lays out what a FoodSaver can and can’t do with mylar, where it shines, what to avoid, and the setups that give you a reliable seal every time.
Can A FoodSaver Seal Mylar Bags? Practical Answer
Short answer: a FoodSaver’s heat bar can seal many thin mylar bags and chip-style “mylar-type” packages. It can’t pull a proper vacuum on smooth mylar because the pump needs air channels to evacuate air. FoodSaver’s own guidance says you must use their textured channel bags to vacuum, but you can re-seal mylar-type or stiff plastic bags with heat only. That’s the line in the sand.
FoodSaver And Mylar Basics
FoodSaver countertop units are “external suction” sealers. They evacuate air through channels created by a textured bag wall. Smooth mylar has no channels, so air stalls before the pump can finish the job. You’ll still get a heated seam, but not a vacuumed bag unless you add a workaround. The safest path for true vacuum on smooth mylar is a separate impulse sealer, or you switch to textured channel bags for anything that must be vacuumed.
Quick Reference: What Works, What Doesn’t
- Heat-seal only (no vacuum): many thin mylar bags and snack-bag style mylar. Works on the heat bar.
- Vacuum + seal with FoodSaver: textured channel bags (FoodSaver rolls/bags).
- Vacuum in rigid containers: Mason jars using the FoodSaver jar-sealer accessory.
- Smooth mylar vacuuming: not natively supported; use an impulse sealer or a textured “channel strip” hack if you know what you’re doing.
Early Decision Table: Mylar, Thickness, And Your Options
This table gives you a fast way to decide how to pair mylar with your FoodSaver. It compresses the most common real-world choices.
| Bag Type / Thickness | Vacuum With FoodSaver? | Heat-Seal On FoodSaver? |
|---|---|---|
| Smooth mylar, ~2–3 mil | No (no channels) | Often yes (firm pressure on the bar) |
| Smooth mylar, ~4–5 mil | No | Usually yes; slower seal time helps |
| Smooth mylar, 7+ mil | No | Hit-or-miss; an impulse sealer is safer |
| “Mylar-type” snack/chip bag | No | Yes (re-seal the open edge) |
| Textured FoodSaver roll/bag | Yes | Yes |
| Mason jar + FoodSaver jar sealer | Yes (via accessory) | N/A (no bag seam) |
| Smooth mylar + short textured strip at mouth | Sometimes (workaround) | Yes |
Sealing Mylar Bags With A FoodSaver: What Works Now
Let’s translate brand guidance into practical setups you can copy. FoodSaver states you must use its textured bags and rolls for vacuum sealing; the waffle pattern keeps air flowing to the pump. The same page also says you can use the appliance to re-seal “mylar-type” or stiff plastic bags (think snack bags) without vacuum. That’s your official baseline and the reason many users employ the heat bar on thin mylar when they just need a seam.
For dry goods that don’t require a food-contact vacuum bag—spices, grains in jars, dehydrated snacks—the jar-sealer accessory is a clean workaround. You get a full vacuum inside a glass jar and skip bag questions entirely. It’s fast, repeatable, and avoids sealing stubborn foil laminates at all.
When To Bring In An Impulse Sealer
If you need a high-confidence seam on thicker mylar (5–7 mil and up), an impulse sealer wins. It delivers a wider, hotter, more controlled weld across the foil laminate. Pair that with oxygen absorbers for oxygen-free storage of dry staples. Many home pantries run this exact combo for long term storage of grains, beans, and similar low-moisture foods.
Method 1: Heat-Seal Only On The FoodSaver Bar
This is the simplest route when vacuum isn’t required. You load a thin mylar bag with dry contents, smooth the mouth flat, and press on the bar to make a seam. If your unit lets you control seal time, bump it slightly for thicker laminates. You’re not removing air; you’re just closing the package. It’s perfect for portion packs you’ll consume soon, or for snack-bag re-seals.
Steps That Keep Seams Clean
- Flatten the mouth of the bag—no wrinkles over the hot strip.
- Wipe away dust on the seal area—flour and fine powders weaken seams.
- Use a double seam if the bag is stiff: two parallel seals add insurance.
- Let the seam cool before bending; hot film can spring open under stress.
Method 2: The “Channel Strip” Workaround
Some users slip a short piece of textured channel bag inside the mylar mouth to create an air path, run the FoodSaver’s vacuum cycle, then seal. It can work on thinner mylar. It’s still a workaround, not an official feature, and results vary with bag thickness and machine model. If the bag doesn’t pull down hard or you see air creeping back, pivot to jars or an impulse sealer.
Method 3: Mason Jars With The FoodSaver Jar Sealer
For dry goods you’d rather keep in rigid containers, the jar-sealer accessory snaps onto a regular- or wide-mouth Mason lid and pulls a strong vacuum. It’s quick, repeatable, and sidesteps the mylar debate. It’s also easy to re-vac after opening a jar to grab a handful of rice or oats.
Best Uses For The Jar Sealer
- Short- and medium-term pantry storage of grains, beans, coffee, and snacks.
- Vacuum-locking dehydrated produce and spices between uses.
- Zero-waste cycles—reuse jars and lids instead of consumable bags.
Safety First With Dry Goods
Stick to low-moisture, low-fat foods when you’re creating low-oxygen storage. High moisture or high fat invites quality loss and can create unsafe conditions. If you’re moving beyond simple re-seals into long-term storage, add oxygen absorbers sized to the container and keep everything cool and dark. The longer-term food supply guidance used by many home pantries explains how to pair dry staples with oxygen absorbers and cool storage.
Why Smooth Mylar Won’t Vacuum On A FoodSaver
A FoodSaver’s pump needs a path to draw air. That’s what the brand’s textured channels do: they hold tiny ridges open so air can rush out during the cycle. Smooth foil laminates collapse flat at the mouth before most of the air leaves, so the pump cavitates and you’re left with a bag that looks sealed but isn’t vacuumed. That’s why the manufacturer requires its channel bags for vacuuming and only endorses re-sealing mylar-type bags with heat.
Field Test Tips For Better Seals
Dial In The Seal
- Do a test strip on scrap mylar to find the shortest seal time that bonds fully.
- On rigid laminates, use two narrow seams instead of chasing one extra-hot seam.
- If your unit allows, switch to “seal only” mode for mylar and press firmly.
Protect The Seal Area
- Fold a temporary cuff at the bag mouth before filling so dust can’t reach the seam zone; unfold and seal clean film.
- Shake the bag to settle contents and squeeze out as much air as you can by hand before sealing.
Sizing Oxygen Absorbers For Mylar Bags
Oxygen absorbers are rated in cubic centimeters (cc). You match the rating to the headspace oxygen in your container. For small containers, 300-cc packets are a common match up to 1-gallon rigid containers and jar projects, and they’re widely available through trusted suppliers. Always add enough total cc to cover the container, and seal promptly after opening the absorber pouch.
| Container Size | Typical Total CC | Notes |
|---|---|---|
| Pint jar / 0.5 L | 100–150 cc | Quick-use spices and snacks |
| Quart jar / 1 L | 200–300 cc | Dehydrated produce, grains |
| 1-gallon rigid container | ~300 cc | Common single-packet choice |
| 1-gallon mylar (thin) | 300–400 cc | Add a second packet if headspace is large |
| 2–3 gallon mylar | 600–1000 cc | Split packets across layers as you fill |
| 5-gallon mylar liner | 2000–2500 cc | Common long-term grain setup |
| Mixed dry goods | Match to container | Use fresh absorbers, seal fast |
Two Clean Setups That Just Work
Setup A: Heat-Seal Thin Mylar + Oxygen Absorber
- Fill the bag with dry, low-fat goods (rice, wheat, beans).
- Drop in the correct absorbers. Press to flatten the headspace.
- Use “seal only” on the FoodSaver. Make one seam, then a second parallel seam.
- Let cool. Label contents and seal date. Store cool, dark, and off the floor.
Setup B: Skip Mylar, Vacuum Jars Instead
- Load a Mason jar. Wipe the rim clean.
- Place the flat lid on, cap with the FoodSaver jar-sealer head, and pull vacuum.
- Remove the head; add a band for transport. That’s it.
FAQ You Came To Settle
Will My FoodSaver Seal Every Mylar Bag?
No. Thin laminates usually seal; very thick laminates often don’t. If you need a weld that laughs at rough handling, use an impulse sealer.
Can I Vacuum Smooth Mylar With A FoodSaver?
No, not natively. You can try a short textured strip as an air path, but results vary. If the bag doesn’t collapse tightly, move to jars or impulse-seal mylar and add oxygen absorbers.
What About Snack Bags?
Re-sealing works well. You’re restoring a heat seam on a stiff “mylar-type” bag. It’s handy for snacks, coffee, and pantry odds and ends.
Manufacturer Guidance You Should See
FoodSaver says channel bags/rolls are required for vacuum sealing; the system’s textured pattern keeps air moving to the pump. The same guidance explains you can use the appliance to re-seal “mylar-type” or stiff plastic bags without vacuum—exactly what you’ll do when you heat-seal thin mylar or restore a snack-bag seam. Read that note here: FoodSaver bag and roll FAQ.
Smart Storage Practices For Low-Oxygen Packaging
For long storage, keep packages cool, dry, and dark. Label every bag or jar with contents and month-year. Rotate stock on a “first in, first out” rhythm. For a simple, trusted outline on dry-food storage with oxygen absorbers, the longer-term food supply page lays out a straightforward approach many households follow.
Keyword Recap In Plain Words
You asked, “can a foodsaver seal mylar bags?” Heat-seal, yes. True vacuum on smooth mylar, no—unless you add a workaround or use different gear.
And again, “can a foodsaver seal mylar bags?” The machine’s bar can bond many thin laminates and snack-style mylar. For vacuum, switch to textured channel bags, jar-seal a rigid container, or bring in an impulse sealer.
Final Choice Map: Pick Your Path
If You Need A Simple Seam
Use the FoodSaver in “seal only” mode on thin mylar. Double seam. Store cool and dark.
If You Need A True Vacuum
Use textured channel bags on the FoodSaver, jar-seal Mason jars, or impulse-seal smooth mylar and add oxygen absorbers.
If Your Bags Are Thick
Reach for an impulse sealer. It’s built for heavy laminates and gives you a wider, stronger weld.