Heavy Duty Zip Lock Bags, 75 and 100 Micron
Thick, puncture resistant press seal bags in 75 micron and 100 micron food grade plastic, from 50 x 75mm up to large 380 x 510mm. Sold in bulk cartons with same-day dispatch on orders before 12pm.
Heavy duty zip lock bags for every job
Choose the thickness and style that suits what you are storing, from small parts to bulk food and documents.
75 Micron Zip Lock Bags
Our thick press seal bags in 12 sizes, from 50 x 75mm to 380 x 510mm. Cartons of 500 or 1,000.
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100 Micron Write-On Bags
Our thickest zip lock bags, with white write-on panels for labels, codes and dates. 3 sizes.
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Maxigrip Bottom Loading
Tamper evident 75 micron bags that you fill from the bottom and heat seal. 5 sizes.
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Stand Up Pouch Bags
Resealable pouches with a bottom gusset that stand on a shelf, in clear and kraft.
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50 Micron Write-On Bags
Standard thickness bags with a write-on panel, for lighter items that still need labelling.
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Standard Zip Lock Bags
Need a lighter bag? Our 50 micron zip lock bags come in 25 sizes for everyday packing.
See standard bags ›Heavy duty zip lock bag sizes
Every heavy duty size we stock, measured width x length of usable space. Click a size to order.
| Bag | Sizes | Good for |
|---|---|---|
| Small, 75 micron | 50 x 75mm, 75 x 100mm, 90 x 150mm | Screws, small parts, beads and samples |
| Medium, 75 micron | 150 x 205mm, 150 x 230mm, 205 x 255mm | Food portions, spare parts and retail stock |
| A4, 75 micron | 205 x 305mm, 230 x 305mm, 230 x 330mm | Documents, manuals and clothing |
| Large, 75 micron | 280 x 380mm, 355 x 405mm, 380 x 510mm | Bulk food, garments, tools and storage |
| Write-on, 100 micron | 100 x 155mm, 155 x 230mm, 230 x 320mm | Labelled samples, stock and evidence |
| Maxigrip, 75 micron | 100 x 180mm, 125 x 230mm, 150 x 255mm, 180 x 280mm, 205 x 305mm | Tamper evident retail and food packs |
Allow a size and thickness variance of up to 5% from the manufacturing process. Need a size not listed? Ask us about made to order bags.
Large heavy duty zip lock bags
Our biggest and thickest resealable bags, for bulk storage, garments and heavier items.
380 x 510mm, 75 Micron
Our largest heavy duty zip lock bag. Carton of 500.
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355 x 405mm, 75 Micron
A wide bag for folded garments and bulk food. Carton of 500.
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280 x 380mm, 75 Micron
Fits larger documents, tools and kits. Carton of 500.
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230 x 330mm, 75 Micron
A4 size for manuals, paperwork and flat items. Carton of 1,000.
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230 x 320mm, 100 Micron
Extra thick with white write-on panels for labelling. Carton of 500.
Shop now ›Maxigrip 205 x 305mm
Largest bottom loading tamper evident bag, 75 micron. Carton of 1,000.
Shop now ›What makes a zip lock bag heavy duty?
The thickness of a zip lock bag is measured in microns (µm). Our standard zip lock bags are 50 micron. Our heavy duty bags are 75 micron, half as thick again, and our write-on bags are 100 micron, double the standard thickness. Thicker bags resist punctures from sharp corners and keep their shape when filled with heavy items.
All our heavy duty zip lock bags are clear and made from food grade polythene (LDPE), so you can see what is inside and use them for food, confectionery, hardware, collectables and retail stock. The press seal strip clicks shut and reopens again and again.
You may also know them as snap lock bags, press seal bags, click seal bags, resealable bags or zip seal bags. Whatever you call them, we stock them in bulk cartons at our Brisbane warehouse and ship them Australia-wide.
- Hardware and parts
- Food and bulk goods
- Collectables
- Laboratories and samples
- Warehousing
- Retail packs
Choosing a heavy duty bag
- Measure the usable space
- Sizes are width x length below the seal, so allow room for the thickness of what goes in.
- Go thicker for sharp items
- Screws, tools and hard edges call for 75 or 100 micron.
- Label with write-on panels
- The 100 micron bags have white panels for codes, dates and contents.
- Need tamper evidence?
- Maxigrip bags are heat sealed at the bottom and must be torn open at the top.
What our customers say
Steve Dillon from Lollipop Cake Supplies talks about working with QIS Packaging.
Need a size or thickness we do not stock?
We can have zip lock bags made to order in custom sizes, thicknesses and print for large orders. Tell us what you need and our team will put together a quote.
The easy choice for heavy duty zip lock bags
Here is how we compare to the typical packaging supplier.
Heavy duty zip lock bag FAQs
Answers to the questions we are asked most about thick resealable bags.
Are your heavy duty zip lock bags food grade?
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Yes. Our 75 micron and 100 micron zip lock bags are made from food grade polythene, so they are safe for storing food, confectionery and lunches.
How thick are heavy duty zip lock bags?
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Our heavy duty bags are 75 micron, and our write-on panel bags are 100 micron. Standard zip lock bags are 50 micron. Allow a variance of up to 5% from the manufacturing process.
What is the largest heavy duty zip lock bag you sell?
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Our largest is the 380 x 510mm, 75 micron bag, sold in cartons of 500. Other large sizes are 355 x 405mm and 280 x 380mm.
What is a Maxigrip bottom loading bag?
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Maxigrip bags are 75 micron resealable bags that you fill through the open bottom and then close with a heat sealer. They are tamper evident: the customer tears them open along the notches above the zip, then reseals them until the contents are used.
What is the difference between polythene and polypropylene bags?
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Polythene (LDPE) is softer, more flexible and slightly cloudy, which makes it good for storage and for protecting light sensitive collectables. Polypropylene is crystal clear and crisper, which suits display packaging. Our heavy duty zip lock bags are polythene.
Do you sell black zip lock bags?
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Not as a stock item. Our heavy duty zip lock bags are clear so you can see the contents and any labels. For large orders, request a quote and we can look at custom made bags.
How long will my order take to arrive?
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Orders placed before 12pm Monday to Friday are dispatched the same day. Typical delivery times after dispatch:
- Brisbane: 1 to 2 business days
- Sydney and Canberra: 2 business days
- Melbourne: 2 to 3 business days
- Adelaide: 5 to 6 business days
- Perth: 7 business days
- Hobart: 7 to 10 business days
- Darwin: 7 to 14 business days
Freight is priced on postcode and weight, and you choose your carrier at checkout. See our freight page for an estimate.
Can you make a custom size?
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Yes. We can custom manufacture bags in any size or buy in special lines, provided the order is large enough. Request a quote or call us on 1800 555 343 to talk about your options.