Heavy Duty Grip Seal Bags

Features & Benefits

• Heavy duty grip seal bags 300 gauge (75 micron) clear LDPE construction
• Contains 30% recycled content
• Stronger and thicker than standard 140 gauge grip seal bags
• Greater resistance to tearing, splitting and puncturing
• Suitable for bulkier, heavier and moderately sharp-edged products
• Secure press-to-close grip-seal fastening
• Opens and reseals whenever access is required
• Requires no heat sealer, tape or additional closure
• Helps protect contents from dust, dirt and moisture
• High-clarity material for easy product identification
• Keeps components and products securely contained
• Suitable for storage, sorting, transportation and distribution
• Available in a practical range of sizes
• Convenient packs of 100

Common Uses

Our 300 gauge heavy duty grip seal bags are ideal for storing, organising and protecting:

• Engineering components
• Automotive parts
• Metal fixings and fasteners
• Screws, nuts, bolts and washers
• Spare parts and replacement components
• Electrical accessories
• Cables, connectors and fittings
• Small tools and hardware
• Plumbing components
• Machine parts
• Industrial samples
• Repair and maintenance kits
• Heavy duty craft materials
• Product samples
• Instruction manuals and paperwork
• Retail products
• eCommerce orders
• Warehouse stock
• Order-picking items
• General industrial merchandise

Heavy Duty Clear Grip Seal Bags – 300 Gauge (75 Micron)

Our heavy duty clear grip seal bags provide a strong, practical and resealable packaging solution for bulky, dense or moderately sharp-edged products. The high-clarity 300 gauge (75 micron) LDPE film contains 30% recycled material, combining additional strength with clear product visibility.

The thicker 75 micron material offers greater resistance to tearing, splitting and puncturing than standard 140 gauge grip seal bags. As a result, these robust bags suit engineering components, automotive parts, metal fixings, tools, electrical accessories and other products that require dependable protection during handling, storage and transportation.

Each bag also features an integral press-to-close grip seal. Simply press firmly along the top fastening to close the bag. The secure closure keeps products safely contained while allowing quick access whenever needed.

You do not need heat-sealing equipment, tape, staples or separate fastening materials. This convenience makes heavy duty self seal bags a practical choice for warehouses, workshops, manufacturers, distributors, retailers and eCommerce fulfilment centres.

The high-clarity finish keeps products, labels, barcodes and enclosed paperwork visible. Furthermore, the range includes several practical sizes for small metal components, larger parts, documents and commercial products.

Heavy Duty Protection for Demanding Applications

At approximately 75 microns thick, these 300 gauge grip seal bags provide considerably more strength than standard-duty grip seals. They work particularly well for products that could stretch, tear or puncture thinner packaging.

For example, businesses can use them to collate dense components, prepare repair kits, organise engineering parts and protect valuable stock. The heavy duty construction also helps each bag retain its shape under heavier contents.

Although the thicker film provides improved protection, extremely sharp edges may still puncture the polythene. Cover, wrap or cushion sharp points before placing them inside the bag.

Secure and Convenient Resealable Packaging

Place the product inside the bag without overfilling it. Then press firmly along the entire width of the seal until you have closed the fastening completely.

To reopen the bag, gently pull the two sides apart above the seal. You can close it again after inspecting, counting or using the contents.

The resealable design supports stock control, component storage, order picking, repair kits and production work. It keeps related products together and easy to identify, helping businesses maintain organised storage and packing areas.

How to Measure Heavy Duty Grip Seal Bags

We list heavy duty grip seal bag dimensions as:

Width × Height To Seal

The height measurement covers the usable internal space between the bottom of the bag and the grip-seal closure. It does not include the material above the seal.

For the best fit:

• Measure the widest part of your product
• Measure its complete height or length
• Allow additional space for the product’s thickness or depth
• Leave enough space above the contents to close the seal fully
• Cover or cushion sharp edges before packing
• Select a larger size for bulky or irregularly shaped products
• Avoid overfilling or stretching the bag

Heavy Duty Grip Seal Bags for A5 and A4 Documents

Our heavy duty grip seal range includes practical sizes for storing and protecting standard A5 and A4 paperwork:

• 7 x 10 inch / 175mm x 250mm heavy duty grip seal bags – suitable for A5 documents measuring 148mm × 210mm
• 9 x 14 inch / 225mm x 350mm heavy duty grip seal bags – suitable for A4 documents measuring 210mm × 297mm

These heavy duty resealable bags protect instruction manuals, technical information, certificates, photographs, artwork, repair documents and paperwork accompanying industrial parts or equipment.

The clear polythene keeps documents visible without opening the bag. Meanwhile, the secure grip seal provides quick access whenever you need the paperwork.

Thicker document bundles, catalogues, folders and rigid items may require extra space. Measure the complete contents and choose a sufficiently large bag to avoid placing excessive pressure on the seams or closure.

Clear 300 Gauge Polythene Construction

These bags use heavy duty 300 gauge polythene, equivalent to approximately 75 microns. The thicker material provides additional strength while keeping the contents visible.

The high-clarity LDPE film keeps stock codes, barcodes, labels and enclosed documents easy to see. This visibility can speed up stock control, order picking and product identification.

The flexible material also conforms around components and irregularly shaped products more easily than many rigid containers. It therefore provides a versatile solution for numerous commercial and industrial applications.

Contains 30% Recycled Content

The polythene film contains 30% recycled material, helping reduce the amount of virgin plastic required. At the same time, it retains the strength, flexibility and clarity needed for demanding commercial packaging applications.

Businesses can also reuse the bags when they remain clean and undamaged. This approach helps companies make more efficient use of their packaging materials.

Why Choose Our 300 Gauge Heavy Duty Grip Seal Bags?

Our 300 gauge bags provide additional strength for products that could damage thinner, standard-duty grip seals. They offer dependable protection for demanding storage and handling applications.

The bags combine robust 75 micron polythene with a convenient press-to-close seal. You can access and reseal products without tape, ties or specialist sealing equipment.

Manufacturers, engineering companies, automotive businesses, workshops, distributors, retailers, warehouses and fulfilment centres can use these bags to organise and protect heavier products.

Finally, the range includes several useful sizes. You can select a suitable heavy duty grip seal bag for anything from small metal fixings and components to larger parts, kits and documents.

What Are Heavy Duty Grip Seal Bags Also Known As?

Suppliers, industries and customers use several different names for heavy duty grip seal bags. Common search terms include:

• Heavy duty grip seal bags
• Heavy duty gripseal bags
• Heavy weight grip seal bags
• Heavyweight gripseal bags
• 300 gauge grip seal bags
• 75 micron grip seal bags
• Thick grip seal bags
• Strong resealable plastic bags
• Heavy duty self seal bags
• Industrial grip seal bags
• Heavy duty reclosable bags
• Resealable polythene bags
• Heavy duty poly bags
• Press seal component bags
• Industrial parts bags
• Clear hardware bags
• Strong component storage bags
• Heavy duty zip seal bags

Unlike open-ended polythene bags, heavy duty grip seals do not require tape, cable ties or heat-sealing equipment. You can also reopen the grip seal without damaging the bag, unlike a permanent adhesive closure.

Whether customers call them heavy duty grip seal bags, 300 gauge self seal bags or 75 micron resealable bags, they provide a strong and convenient packaging solution for demanding commercial and industrial products.

Important Usage Information

These heavy duty bags resist tearing and puncturing more effectively than standard grip seals, but they are not puncture-proof. Extremely sharp, heavy or irregular products may still damage the material.

The bags help protect their contents from everyday dust, dirt and moisture. However, do not rely on them as completely waterproof, airtight, leakproof or tamper-evident packaging.

Always consider the weight, shape and edges of the product when selecting a bag. Use protective wrapping or cushioning where necessary, and test the bag with the intended contents before placing a larger order.

PPWR Compliance Information

Regulation (EU) 2025/40 on Packaging and Packaging Waste, commonly known as the PPWR, applies to polythene and polypropylene packaging placed on the EU market. Material specifications and supporting product documentation are available for our polythene and polypropylene products to help customers complete their compliance assessments. However, material type, recycled content or food-contact suitability alone does not confirm full PPWR compliance. The responsible economic operator must assess the finished packaging and its intended use against all applicable requirements, including packaging minimisation, substances of concern, recyclability, recycled content, labelling and technical documentation. Customers intending to place these products on the EU market should email sales@expresspackaging.co.uk to request the latest available documentation and confirm suitability for their application before making a PPWR compliance claim.

Food Safety Information

Not every size carries certification for direct food contact because the bags contain recycled material. If you require heavy duty grip seal bags for food packaging, please contact our sales team at sales@expresspackaging.co.uk before ordering. We will confirm whether your chosen size meets your requirements and provide a Food Safety Certificate where available.

Sample Requests

To request a sample, please email sales@expresspackaging.co.uk or call 0121 622 2347. For sheeting products supplied on rolls, we will provide a small sample patch cut directly from the roll. A small charge applies to sample bags wider than 600mm.

Illustration Only

We show contents in our product images to demonstrate potential applications. Your order includes the bags only.

Products vary in size, weight and shape, so measure and test your items carefully before ordering. This will help you select the most suitable bag dimensions and thickness.