Plasti-Grip® IV Flat PM Washers
1-800-249-GRIP (4747)
[More Contact Information]
1-3/4" diameter high-density polypropylene flat washer with ribs to stiffen the plate can be screwed, nailed or shot for locking the base coat and attaching EPS or rigid foam board to various substrates. The washer's design allows it to flatten out in application. Application images available here.
  • Round 1-3/4" diameter plastic plate, .050" to .060" gauge thick - tapered.
  • Eight (8) round reversed key holes and slots for coating adhesion/bonding.
  • Screws, nails, concrete anchors, self drilling screws sold separately or assembled.

  • Flat profile design.
  • High density impact resistant plastic plate. Non-rusting, thermal resistant, and tough.
  • PG-IV choked throat of center hole creates tolerance fit for pre-assembled screws and other fasteners
  • Numerous grommet holes and slots.
    • Cavities allow exterior, base coating to bond to disk face.
    • Easy to handle, light weight, firm yet flexible.
  • Unique, round plate design with the outside circumference tapered flat.
    • Round shape design, evenly distributes bearing load without any sharp edges or corners, minimizing damage to facer.
    • Seated plate has zero profile and will not catch the edge of the trowel.
    • Reinforced ribs for extra strength and integrity.
  • Approved by the major system manufactures of exterior coatings & insulation boards.

Ring shank nails, screws (wood or self threading/drilling), concrete anchors, and 4", 5", and 6" ring shank pop-out nails available; sold separately with the same superior "GRIP-GUARD" exterior coating protective coat.


Commercial Testing Co. of Dalton Georgia, an independent laboratory, performed the pull out tests, plotting the chart's wind load data. MSDS and in house testing reports are available for your records. All brads, nails, tacks, screws, and other fasteners classified under Military Classification F-N105B - Copies available.

Rodenhouse Inc / 974 Front NW Suite #100 / Grand Rapids, MI 49504