Food Contact Silicone Sponge Gaskets elevating Sealing Solutions for Food Packaging

Food Contact Silicone Sponge Gaskets: Elevating Sealing Solutions for Food Packaging

In the competitive world of food packaging, reliable sealing is non-negotiable—especially for products like edible olives that demand protection against oil, vinegar, salt, and air to preserve freshness and quality. For Greek food packaging manufacturer Karampasis Konstantinos, the search for a superior sealing solution led them to our food contact silicone sponge gaskets, a game-changing upgrade from traditional rubber gaskets that delivers the 100% sealing performance their olive packaging containers needed.

Based in Athens and exporting plastic olive packaging to the US, Canada, Australia, Europe, and beyond, Karampasis’ team recognized a critical pain point with their existing rubber gaskets: they failed to provide the maximum sealing required for their food containers. When exploring picnic-style food containers with perfect hermetic sealing, they identified sponge silicone cord as the core material behind the enhanced performance—and reached out to our team for a tailored solution that met their strict food safety and durability needs.

At the heart of our collaboration is our food contact silicone sponge gaskets and silicone sponge cord, engineered specifically to withstand the harsh conditions of olive packaging: direct contact with food, exposure to oil, vinegar, and salt, and compliance with international food safety standards. We proposed a material specification of 10-25 Shore A hardness and 250-400 kgr/m³ density—parameters that strike the ideal balance of flexibility for a tight seal and durability for long-term use with food products. To kickstart the evaluation process, we quickly supplied 4mm and 6mm diameter silicone sponge cords (with a MOQ of 200 meters per size) alongside our FDA Certificate, giving Karampasis the assurance of food-grade compliance and the samples needed for initial testing.

Our partnership didn’t stop at supplying high-quality food contact silicone sponge gaskets and cord—we acted as a one-stop solution provider, meeting Karampasis’ needs for both the sealing materials and the equipment to process them. We supplied not only the food grade silicone sponge gaskets but also a semi-automatic bonding machine and silicone adhesive, streamlining their production process and eliminating the need to source from multiple vendors. As Karampasis looked ahead to scaling their operations, they also inquired about our silicone O-ring and plastic lids assembly machine, planning for full automation once their order volumes increased—a vision we were able to support with our comprehensive equipment lineup.

Impressed with the initial 4mm and 6mm silicone sponge cord samples, Karampasis followed up with a second inquiry, requesting 200 meters of 5mm food contact silicone sponge cord (matching the same hardness and density specs) that could withstand vegetable oils, salt, and vinegar. They also requested additional FDA certifications and migration test reports for full compliance verification, which we prioritized to deliver promptly. With successful trial results in sight, Karampasis shared their plans to design new lids for their containers: a 140mm diameter lid paired with a 5mm silicone O-ring (135-138mm diameter, 43cm length) for an annual volume of 600,000 pieces, and another lid with a 4mm silicone sponge cord O-ring (9.5mm diameter, 30cm length) for 1,400,000 annual pieces—both relying on our food contact silicone sponge gaskets as the sealing core.

What solidified our partnership even further was our silicone sponge o ring gaskets fully automatic cutting and bonding machine, a productivity powerhouse that aligns perfectly with Karampasis’ scaling goals. This machine can produce 15 silicone O-rings at once, boasting an impressive output of 20,000-30,000 pieces per day—easily meeting their lead time requirements for large annual volumes (originally projected at 700,000-800,000 large gaskets and 1,000,000 small gaskets yearly). The O-rings produced by this machine feature seamless joints, precisely cut lengths with minimal tolerance, and strong bonding strength—ensuring that the food contact silicone sponge gaskets perform consistently and reliably in every olive packaging container.

This collaboration with Karampasis is a testament to the versatility and reliability of food contact silicone sponge gaskets in the food packaging industry. Unlike traditional rubber gaskets, our food-grade silicone sponge solutions offer unbeatable chemical resistance to oil, vinegar, and salt, FDA-compliant food contact safety, and the flexibility to create custom O-rings and gaskets for any container size or design. Paired with our automated and semi-automated processing equipment, we don’t just supply materials—we deliver end-to-end sealing solutions that scale with our customers’ production needs, from trial runs to mass manufacturing.

For food packaging manufacturers looking to upgrade their sealing performance, protect product freshness, and meet international food safety standards, food contact silicone sponge gaskets are the ultimate solution. Whether you need custom-cut cord, prefabricated gaskets, or the equipment to produce your own O-rings and gaskets in-house, our team is here to act as your one-stop partner—just as we did for Karampasis. From Athens to the globe, our food contact silicone sponge gaskets are elevating food packaging sealing, one hermetic container at a time.