Side Seal Bags & Sachets

Stronger Seals, More Options

Side seal bags deliver something our standard side weld bags can’t - heat-sealed edges that are inherently stronger and more watertight than welded seams. The sealed construction creates robust edges on both sides of the bag, making them ideal for applications where seal integrity really matters.

This construction also opens up materials that simply won’t weld - cellulose-based films like NatureFlex and cellophane, and specialist ovenable films that need to survive serious heat. If you’re working with demanding applications or sustainable materials, side seal is often the answer.

Ovenable Bags

Ready meals that cook in the bag. Supermarket bake-off products that go straight from chiller to oven. Industrial food processing where packaging needs to withstand sustained high temperatures.

Our ovenable side seal bags use specialist PET-based films rated to 200°C and above. The sealed construction maintains integrity through the cooking process - no splitting, no leaking, no compromised seals. Whether you’re a ready meal manufacturer, an in-store bakery supplier, or a food processor needing heat-resistant sachets, we can specify the right film for your temperature and time requirements.

Home Compostable Bags

NatureFlex - made from renewable wood pulp - offers certified home compostability with good barrier properties. Cellophane delivers that distinctive clarity and feel that’s impossible to replicate with synthetics. Both materials require side seal construction because they seal rather than weld.

For businesses needing genuinely sustainable packaging, these aren’t just “recyclable” or “less bad” - they’re designed to break down completely in home composting environments. Real end-of-life solutions for customers who care about what happens to packaging after use.

Powders, Liquids, and Demanding Contents

The watertight seal construction makes side seal bags a natural choice for products that would find weaknesses in welded seams. Powders that need containing without any leakage through microscopic gaps. Products with moisture content that could compromise weaker seals during storage. Applications where absolute seal integrity is non-negotiable.

While we don’t manufacture liquid packaging specifically, the superior seal strength means side seal construction handles demanding contents better than welding.

Materials

Ovenable PET for high-temperature applications - rated to 200°C+ for cooking, baking, and reheating.

NatureFlex for certified home compostable packaging - transparent, renewable, and designed to break down completely.

Cellophane for that classic clarity and feel - biodegradable and compostable with distinctive presentation.

BOPP and CPP where seal strength is the priority rather than material-specific requirements.

Laminates for barrier properties - combining different materials to keep moisture, oxygen, or light away from sensitive contents.

UK Manufacturing

We convert here in the UK, which means 3-4 week lead times rather than months waiting for containers. All side seal bags are manufactured to your specification - sizes up to 500mm × 400mm, custom printing up to 10 colours, perforation where products need to breathe.

We’re a family-owned converter with four decades in flexible packaging, BRCGS AA(*) accredited with full batch traceability. Whether you need ovenable sachets for ready meals or compostable bags for an eco-conscious brand, we can advise on the right specification and deliver reliably.