
If you need to seal, protect, or temporarily close an opening, foam bungs provide a simple, lightweight solution.
Foam bungs are foam components designed to fit securely into holes, tubes, cavities, containers, and other openings. Also known as foam plugs, they can help prevent the ingress of dust, dirt, moisture, and debris. They are often used to protect products during storage and transit, or to temporarily seal equipment and components during manufacturing processes.
At Polyformes, we manufacture custom foam bungs from high-quality closed-cell foam in a wide range of shapes, sizes, and materials to suit your product and application. So whether you require a simple plug, a tapered bung, or a complex custom design, we can produce the right solution for your requirements.
The benefits of foam bungs include:

A foam bung is a shaped piece of foam used to fill or seal an opening. Foam bungs are commonly used to protect products, prevent contamination, or temporarily close holes, tubes, and cavities during manufacturing or shipping.
Foam bungs are used across a variety of industries to protect products during storage and transit, seal openings during manufacturing, prevent contamination, and prevent dust, dirt, and moisture from entering parts or assemblies.
Foam bungs are commonplace across industries such as medical, pharmaceutical, marine, manufacturing, construction, engineering, and packaging. They can be adapted to suit almost any application where an opening needs to be protected or sealed.
Foam bungs typically use closed-cell polyethylene foams. These materials – such as Plastazote®, Evazote®, and Microlen – offer excellent durability, water and chemical resistance, and cushioning properties

We don’t just manufacture foam bungs and parts – we gain a detailed understanding of our business and challenges before proposing a cost-effective solution that does exactly what you need.
Understanding
We discuss your requirements with you, gaining a full, detailed understanding of your project.
Develop
Using your products or CAD data, we develop a solution using appropriate materials.
Test
We provide pre-production samples for testing and assurance on fit and quality.
Manufacture
We manufacture your products in-house at our specialist foam conversion facility.
Support
We forge long term relationships, providing ongoing support and assistance.
At Polyformes, our experience, expertise, and in-house conversion equipment enable us to provide your business with a wide range of benefits.
UK manufacture
Short lead times
Foam experts
Single source
Vast experience
Sustainability
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If you need high-performance foam inserts, packaging, products or materials, we can help. Please contact a member of our team for a free consultation and quote.
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Our experts
The information on this page was written and checked by our team of experts. You can contact them to discuss your requirements, or for any questions you may have, using the details here.
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01525 852 444 (option 1)
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