Thermal-Grip® ci Prong Washer - 1000 Count

The Plasti-Grip® CI Prong Washer is a premium insulation fastening solution designed for attaching continuous rigid insulation (ci) over primary air and weather barriers.

 Universally tested, accepted, or specified for use with all major rigid foam insulation types, it provides a reliable attachment method for demanding building envelope applications.

Featuring dual pre-spotting prongs, the washer allows fast on-the-wall screw assembly without hand assembly. Designed for use with Grip-Deck® screws and fasteners, it securely attaches rigid insulation including extruded polystyrene (XPS), polyisocyanurate (polyiso), mineral wool, and rock wool. Carbon black UV-resistant additives provide prolonged exposure protection during construction. *Made in the USA.

Key Features

• Universally tested, accepted, or specified for all rigid foam insulation.
• 2-inch diameter plastic washer for continuous insulation attachment.
• Dual prongs allow easy on-the-wall screw assembly.
• Designed for attaching rigid insulation over primary air/weather barriers.
• Carbon black UV-resistant additives for extended exposure during construction.
• Stiffened center “Bullseye” ring helps prevent fastener pull-through.
• Flexible perimeter reduces tearing of insulation facer.
• Washer flattens against insulation surface for improved performance.
• Tested and specified for use with Grip-Deck® screws.
• Rigid insulation manufacturer approved.
• Required fastener washer for select insulation systems including DuPont Thermax (ci) and Ultra Air Barrier, Rmax ECOMAXci, Hunter Xci, and Atlas EnergyShield.
• Made in the USA.

Common Applications

• Continuous rigid insulation attachment.
• Exterior insulation systems.
• Air barrier assemblies.
• Weather barrier systems.
• Commercial building envelopes.
• Residential construction.
• XPS insulation installation.
• Polyisocyanurate insulation installation.
• Mineral wool and rock wool attachment.

Ideal For

• Insulation contractors.
• Building envelope professionals.
• Commercial construction projects.
• Projects requiring tested insulation fastening systems.
• Rigid insulation manufacturer-approved applications.

Key Benefits

Fast Installation

Dual pre-spotting prongs allow quick positioning of the washer and efficient on-the-wall screw assembly.

Reliable Insulation Attachment

The reinforced center “Bullseye” ring helps prevent fastener pull-through while maintaining secure attachment.

Enhanced Durability

Carbon black UV stabilizers help protect the washer during extended construction exposure.

Versatile Compatibility

Designed for use with multiple rigid insulation types and approved by major insulation manufacturers.

Improved Surface Performance

The flexible perimeter helps reduce facer tearing, while the washer design allows it to flatten against the insulation surface.

Product Information

Frequently Asked Questions (FAQ)

Q1. What is the Plasti-Grip® CI Prong Washer used for?
It is used to attach continuous rigid insulation over primary air and weather barriers in exterior building envelope systems.

Q2. What insulation types can be used with the CI Prong Washer?
It is designed for use with rigid insulation including XPS, polyisocyanurate (polyiso), mineral wool, and rock wool.

Q3. What fasteners are recommended with the CI Prong Washer?
The washer is designed for use with Grip-Deck® screws and fasteners.

Q4. How do the dual prongs improve installation?
The dual prongs allow pre-spotting into insulation, enabling faster on-the-wall screw assembly without hand assembly.

Q5. How does the washer help prevent insulation damage?
The flexible perimeter reduces facer tearing, while the stiffened center ring helps prevent fastener pull-through.