Fiberglass Reinforced Plastic Panel Adhesive (FRP-300)

This high-solids, trowel-grade wall adhesive is a unique construction adhesive specifically designed for fiberglass-reinforced panels. It's a solvent-based wall adhesive offering excellent gap-filling capabilities and no burn through.


LIQUID NAILS wall adhesive

Key Features

  • Excellent gap filling
  • Trowel grade adhesive
  • Guaranteed not to burn through panels

Recommended For:

adhering FRP panels to cured concrete, cement backerboard, drywall, wood and greenboard.

NOT Recommended For:

adhering FRP panels to wallpaper, exterior surfaces and foamboard (polystyrene). Not recommended for adhering NRP Panels, such as Plas-Tex® by Parkland Plastics.

Available Sizes

  • 3.5 Gal. can
  • 1 Gal. can


  • 3.5 Gal. can covers 175 sq. ft.
  • On smooth surfaces: 1 Gal. can covers 50 sq. ft.


ASTM C-557


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Surface Preparation

For best results, wall adhesive and substrates should be between 50° and 90°F. Surfaces must be structurally sound and dry, free of grease, dirt, dust, wallpaper, paint or anything that would interfere with a bond. Level any high spots, and fill all cracks and holes with appropriate fillers.

Application Prep

1. Cut and pre-fit FRP panels. 2. Spread wall adhesive with the recommended trowel over the entire back of the FRP panel. 3. As soon as wall adhesive is spread over entire panel and before wall adhesive skins over (within 45 minutes), set panel in position and press against wall. 4. Press panel firmly into place, working from the center to the edges until full contact has been made. 5. Bracing may be required if walls or panels are not completely straight. 6. For channel moldings, permanent fasteners and panel spacings, follow FRP panel manufacturer's specifications. For application over concrete: Concrete surfaces need to be dry and completely cured before using this wall adhesive. When installing FRP panels over below-grade concrete where moisture can penetrate, you must first attach furring strips to the concrete block and then attach a solid surface, such as wood or drywall, to these furring strips, then continue with standard FRP wall adhesive application.

Drying Time

Working time: Up to thirty minutes. Very warm, dry conditions will decrease working time.


Use mineral spirits to clean up both wet and dry wall adhesive.

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