Sealstrip Corporation

Sealstrip Corporation is a packaging supply and manufacturing company located at 103 Industrial Drive in Gilbertsville, Pennsylvania, roughly an hour northwest of Philadelphia in the Boyertown and Pottstown area of Montgomery County. The company operates in a specialized corner of the packaging industry, focusing on resealable and easy open features for flexible packaging along with the application equipment that puts those features onto a package at production speed. It can be reached by phone at +1 610-367-6282.

Unlike a general packaging distributor that stocks boxes, tape and void fill, Sealstrip works further upstream with manufacturers, converters and contract packagers. Its business centers on the functional components that determine how a consumer opens a bag or pouch, whether that package can be closed again, and how cleanly the opening feature performs after the product has been sitting on a shelf or in a pantry.

Products and Packaging Solutions

The company is associated with pressure sensitive reseal technology, tear strips and easy open features that are applied to film webs during the bagmaking or form fill seal process. Broadly, the categories of solutions offered by a company of this type include:

• Resealable label systems that allow a flexible bag or pouch to be opened and reclosed repeatedly, commonly used for snacks, cheese, deli meats, produce, pet treats, wipes and similar products where freshness after first use matters.
• Tear strip and easy open features engineered to create a clean, consistent opening line across a film structure, reducing the need for scissors or ragged tearing by the end user.
• Tamper evident and secondary closure options designed to communicate package integrity at the point of purchase.
• Converted roll stock and applied features supplied in formats compatible with existing bagmaking and packaging lines.

Because resealable features must survive heat sealing, freezing, refrigeration, vibration during transport and repeated handling, adhesive selection and film compatibility are central technical concerns. Businesses in this field typically evaluate a customer's existing film structure, sealing temperatures, line speeds and end use conditions before recommending a specific construction. Customers considering a reseal feature often supply samples of their current film and product so that the supplier can determine which adhesive and carrier combination will hold up under real conditions.

Application Equipment

A defining characteristic of Sealstrip's position in the market is that the company supplies not only the resealable and easy open materials but also the machinery that applies them. Applicator equipment is designed to integrate with vertical form fill seal machines, horizontal form fill seal machines, flow wrappers and bagmaking lines, applying the feature to the moving web in register with the package. This combined approach means a customer can source the consumable material and the applicator from one supplier, which simplifies troubleshooting when a line is not running as expected.

Equipment considerations that typically come up in these conversations include available floor space and mounting points on the existing machine, web width, line speed, splice handling, roll diameter and changeover time. Companies evaluating a reseal project often run trials, either at their own plant or with support from the supplier, to confirm that the feature applies cleanly and that package seals remain intact.

Industries Served

Resealable and easy open packaging appears across a wide range of product categories. Food companies represent a large portion of the market, particularly shredded cheese, lunch meat, snack foods, dried fruit, coffee, candy, bakery items and frozen vegetables. Outside of food, the technology is used for pet food and treats, household and personal wipes, medical and hygiene products, hardware and fasteners, lawn and garden goods, and industrial components sold in flexible bags. Brand owners generally adopt these features either to extend product freshness after opening, to improve the consumer experience, or to differentiate a package on a crowded retail shelf.

Customers usually fall into one of three groups: brand owners who specify the feature for their product, film converters who incorporate the feature into roll stock they supply, and contract packagers who run multiple brands on shared equipment. Each group approaches the project differently, and the supplier's role shifts accordingly between design consultation, material supply and equipment installation.

Character of the Business

Sealstrip operates as a family run business, and the scale of the operation shapes how projects move forward. Smaller manufacturers of this kind tend to keep engineering, production and customer support in close physical proximity, which shortens the path between a customer question and a technical answer. Reviewers have noted the coordination among staff and the responsiveness of the team, which is consistent with an organization where the people quoting a job and the people producing it work in the same building.

For customers, this structure usually translates into direct access to knowledgeable staff rather than a tiered support system, and a willingness to take on custom work, sample runs and specialized configurations that larger suppliers may decline. Manufacturing in Pennsylvania also means domestic lead times and the ability for customers in the Northeast and Mid Atlantic to visit the facility, observe production and participate in trials in person.

Location and Facility

The Gilbertsville facility sits in an industrial park setting on Industrial Drive, an area that hosts a mix of light manufacturing and distribution operations. The location is convenient to Route 100, Route 73 and Route 422, providing access to Pottstown, Boyertown, King of Prussia, Reading, Allentown and the broader Philadelphia region. Freight service to and from the site is straightforward given the highway access, and the surrounding corridor is well served by regional carriers.

The property includes a wheelchair accessible parking lot. As with most manufacturing facilities, visits are generally arranged in advance rather than handled on a walk in basis, and customers planning a plant tour, a sample evaluation or an equipment demonstration should contact the company beforehand to schedule a time.

Practical Information

• Address: 103 Industrial Dr, Gilbertsville, PA 19525, United States
• Phone: +1 610-367-6282
• Business category: packaging supply and manufacturing
• Parking: wheelchair accessible parking lot on site
• Typical customers: brand owners, film converters, contract packagers and manufacturers using flexible packaging

Prospective customers are usually best served by contacting the company with details about their current package: film structure and thickness, package size, product type, line equipment, target speed and the opening or reclosing behavior they want the consumer to experience. That information allows the company to recommend a material construction and, where needed, the appropriate applicator configuration to produce the feature reliably in production.