Learn more about our seal heads, benefits and options.
Many heat seal users know that quality seals require a set of hard (metal) and compliant (silicone) tools coming together on either side of your cup, tray, or bowl. Often in rigid packaging applications, silicone is used on the bottom of the sandwich as the part holding fixture used in conjunction with a metal seal head on top.
But did you know…
You can flip that process upside down!
In instances where satisfactory seals have not been achieved with metal heads and silicone holding fixtures or instances where part or machine geometry complicates the use of silicone holding fixtures – Silicone Seal Heads can replace metal heads with a number of key performance advantages.
Silicone Seal Heads, used as part of a tooling set along with metal part holding fixtures, provide superior heat sealing performance – reduced leakers!
Highly repeatable Silicone Seal Heads, Custom molding utilizing CNC engraved tools.
Magnetic, quick-change mounting formats, Up to 90 x faster silicone head changeover speeds.
Up to 50% improvement in mounting accuracy with magnetic mounting system.
Our team designs patterns to optimize results for each unique application. Patterns are molded directly onto Silicone Seal Heads in multiple reliefs and heights.
Heat tolerant up to 550° F, Thermally Conductive, Thermosil® formulation offers very fast heat recovery.
Proprietary Process, Unmatched adhesion, No need for adhesives.
Alternative to wrapping tools with Teflon tape, Lasts 7x longer, Reduces changeover time while enhancing seal integrity.
At United Silicone, each Silicone Seal Head is carefully crafted to meet the unique needs of each application. We produce flat, contoured and multi-level Silicone Seal heads in both disposable and re-coatable formats for use in our system or competitor systems. We offer three different silicone formulations (in 40-90 durometer Shore A) each specially designed to withstand the temperatures and pressures of the heat seal process.
Character Height (A)
Silicone Thickness (B)
Aluminum Thickness (C)