Modern roofing and building envelope systems rely on advanced materials designed to protect structures from moisture intrusion, air infiltration, and structural damage. One of the most widely used technologies in the construction industry today is the self-adhesive waterproofing membrane.
These high-performance materials are commonly used in roofing assemblies, foundation protection, flashing systems, and wall air barriers. While the adhesive layer of these membranes receives most of the attention, an equally critical component is the release liner.
A release liner protects the pressure-sensitive adhesive during manufacturing, converting, shipping, and installation. When the product is ready to be applied, the release liner removes cleanly from the adhesive surface, allowing the waterproofing membrane to bond securely to the substrate.
Fox River Associates is a leading North American supplier of film release liners and paper release liners used in building and construction applications, including roofing systems and waterproofing membranes. For more than 35 years, the company has provided high-quality silicone coated release liners that deliver consistent performance across demanding industrial applications.
Fox River Associates supplies both:
- One-side silicone coated release liners (S1S)
- Two-side silicone coated release liners (S2S)
For two-side silicone coated products, differential silicone coatings are available to control release forces and optimize converting performance.
Our portfolio includes a full range of substrates, including polypropylene (PP), PET polyester, HDPE, LDPE, and paper release liners, allowing manufacturers and material converters to select the optimal material for their adhesive systems.
To explore our full range of substrates and coating options, visit our core product pages:
- Film Release Liners
- Paper Release Liners
- Self-Adhesive Release Liners
- Release Liners for Tape Applications
These pages form part of Fox River Associates’ release liner technology resource center, helping manufacturers identify the most appropriate release liner solution for their application.
Call Fox River Associates today at 1-800-647-6579 or fill out the form on this page for more information about Release Liners for your products.
The Role of Release Liners in Self-Adhering Waterproofing Membranes
Self-adhesive waterproofing membranes are widely used throughout the building and construction industry to create durable moisture barriers. These products are commonly applied in:
- roofing underlayment systems
- foundation waterproofing
- window and door flashing
- air barrier assemblies
- structural waterproofing systems
These membranes typically consist of a polymer-modified asphalt or pressure-sensitive adhesive layer designed to bond directly to substrates such as plywood, concrete, gypsum sheathing, or metal roofing components.
Because the adhesive layer is highly aggressive, it must be protected prior to installation. Waterproofing release liners from Fox River Associates serve as the protective carrier that prevents the adhesive from bonding prematurely.
During installation, contractors peel away the release liner, exposing the adhesive surface so the waterproofing membrane can be applied quickly and efficiently.
For roofing and waterproofing manufacturers, the release liner must provide several essential performance characteristics:
- consistent release force during installation
- stable unwind performance during manufacturing
- resistance to temperature and humidity exposure
- compatibility with aggressive construction adhesives
- durability during shipping and storage
Selecting the appropriate film release liner or paper release liner ensures both efficient manufacturing and reliable installation performance.
Contact Fox River Associates today to discuss your building and construction release liner application and discover how high performing paper release liner or film release liner from Fox River Associates can improve efficiency, quality, and profitability in your operation. Use the form on this page and our team will contact you promptly.
Two-Side Polypropylene Film Release Liners for Waterproofing Membranes
One of the most widely used solutions for waterproofing membranes is the two-side silicone coated polypropylene film release liner.
Polypropylene film provides an excellent balance of strength, flexibility, and chemical resistance. When combined with high-performance silicone coatings, polypropylene film release liners deliver predictable and consistent release properties that are well suited to aggressive construction adhesives.
Fox River Associates supplies two-side silicone coated polypropylene release liners (S2S) specifically designed for applications such as roofing membranes and waterproofing barriers.
These release liners help manufacturers maintain efficient production processes while ensuring the membrane layers unwind smoothly during installation.
For many applications, differential silicone coatings are applied to two-side silicone coated release liners. Differential coatings allow one side of the release liner to be released more easily than the other. This controlled release behavior helps manage roll unwinding and improves converting efficiency during membrane production.
Because waterproofing membranes are often produced in wide rolls and installed in demanding job site conditions, polypropylene film release liners provide the durability and consistency required for these applications.
Silicone Coatings: The Engine Behind Release Liner Performance
The key technology behind any release liner is the silicone coating applied to the substrate.
Silicone coatings create a controlled release interface between the adhesive layer and the release liner surface. Without this silicone layer, adhesives would bond permanently to the substrate, making separation impossible.
Fox River Associates supplies silicone coated film release liners and silicone coated paper release liners with a range of release levels designed to match specific adhesive systems used in roofing and construction materials. Release liners are available with coating systems ranging from premium easy release to easy release, medium release, and tight release.
By selecting the appropriate silicone chemistry and coating weight, manufacturers can achieve precise release forces that balance production efficiency with installer convenience.
Two-side silicone coated release liners can also be engineered with differential silicone coatings, allowing the release force on one side of the release liner to differ from the other. This is particularly useful for multilayer adhesive constructions and roll-to-roll converting operations.
The result is a release liner system that provides consistent unwind performance and reliable adhesive protection.
Our technical team is experienced in recommending the appropriate substrate/coating combination for building & construction and waterproofing systems. Contact us today at 1-800-647-6579. We’re here to help.
Film Release Liners and Paper Release Liners for Construction Materials
The building and construction industry relies on both film release liners and paper release liners, depending on the adhesive system and product design.
Film release liners are widely used when durability, moisture resistance, and dimensional stability are critical. Film substrates such as polypropylene, polyester, HDPE, and LDPE offer excellent mechanical strength and consistent coating performance.
Paper release liners, by contrast, can provide excellent lay-flat characteristics and may offer a cost-effective solution for certain adhesive constructions.
Fox River Associates supplies a wide range of release liner substrates for construction applications, including:
- polypropylene film release liners
- PET polyester film release liners
- HDPE and LDPE film release liners
- multilayer specialty film release liners
- high-performance paper release liners, including Glassine, SCK and CCK
This broad product portfolio allows Fox River Associates to support both specialized construction applications and high-volume waterproofing membrane production.
Why Building Materials Manufacturers Choose Fox River Associates
Manufacturers across North America rely on Fox River Associates as a trusted supplier of film release liners and paper release liners for building and construction applications.
Fox River Associates offers several advantages compared with competitive suppliers.
First, the company provides extensive technical knowledge and a broad release liner product offering. Fox River Associates works closely with customers to identify the most appropriate release liner solution for each adhesive system and converting process.
Second, Fox River Associates maintains inventory programs that support customer growth. By stocking materials and maintaining reliable supply chains, the company ensures release liner availability with some of the fastest turnaround times in the industry.
Third, Fox River Associates offers flexible service programs that make the company easy to work with. Low minimum order quantities and responsive customer support allow both emerging manufacturers and large construction material producers to access high-quality release liners.
This combination of technical expertise, inventory availability, and responsive service has made Fox River Associates a preferred partner for companies producing roofing membranes, flashing products, and waterproofing materials.
Release Liner Expertise for Roofing and Construction Applications
As construction materials continue to evolve, manufacturers require partners who understand both adhesive technology and release liner engineering.
Fox River Associates provides release liner solutions for a wide range of building and construction applications, including:
- roofing membranes
- waterproofing barriers
- flashing systems
- air barrier products
- adhesive construction tapes
Whether the requirement is a two-side silicone coated polypropylene film release liner for waterproofing membranes or a paper release liner for adhesive construction products, Fox River Associates delivers reliable supply and consistent performance.
Partner With Fox River Associates for Roofing Release Liners
The performance of a waterproofing membrane depends on the reliability of its release liner.
Fox River Associates combines decades of release liner expertise, an extensive portfolio of film release liners and paper release liners, and responsive customer service to help manufacturers optimize their building and construction products.
If you are developing roofing membranes, waterproofing systems, or adhesive construction materials, Fox River Associates can help you identify the most appropriate release liner solution for your application.
Use the form on this page to contact Fox River Associates today to learn how the appropriate film release liner or paper release liner can improve both manufacturing efficiency and product performance in your operation.