Rosco FoamCoat™

Rosco FoamCoat™ is a revolutionary non-toxic, water‐based coating designed for styrofoam, polystyrene foam, and a wide range of other surfaces. It cures to a hard, durable finish that resists chipping and cracking while still allowing you to sand, smooth, or carve for intricate detailing. Fully compatible with Rosco Scenic Paints – whether used as colorants or surface coatings – FoamCoat is also flame retardant and water resistant.

Key Features

• Durable Finish: Hard, long-lasting protection that withstands physical abuse.
• Versatile Application: Ideal for foam, primed wood, concrete block, primed fiberglass, papier mâché, muslin, and more.
• Detail Friendly: Can be sanded or carved to add fine detailing without sacrificing strength.
• Safe & Easy to Use: Non-toxic, water-based formulation that cleans up with soap and water.
• Flame Retardant & Water Resistant: Enhances safety and durability for both indoor and outdoor projects.

Application Instructions

Apply Rosco FoamCoat™ by brush, roller, or hopper spray gun – depending on the finish you desire. For fine details, use successive thin coats to build up protection without obscuring the design. For an extra-smooth finish without the need for sanding, smooth the surface with a wet sponge before the FoamCoat sets completely.

Suggested Use

Perfect as a protective coating for foam projects that endure heavy use or need to last through extended tours. Additionally, FoamCoat serves as a superior texturing agent that is more durable and less brittle than traditional plaster or joint compound.

Surface Preparation

• Foam: Ensure all surfaces are clean, dry, and free of dust or grease before application.
• Wood & Plastic: Clean and prime with Rosco Tough Prime prior to application.
• For particularly challenging surfaces, a light sanding will help create additional “tooth” for better adhesion.

Compatibility & Mixing

• Compatible with most water-based coatings. Tint FoamCoat™ using Supersaturated Roscopaint or other quality colorants (Proline, Mixol, Universal, or Cal Tints). No priming of FoamCoat™ is required before painting.
• Mixing: Stir well before use. Solids may settle, so a power mixing blade is recommended.
• Dilution: Use undiluted for a robust, single-coat application. For a more fluid finish that flows and levels smoothly, FoamCoat™ can be diluted with water.

Technical Specifications

• Color: Off-white with a matte finish
• Coverage: Approximately 150 sq. ft. per gallon (14 sq. m. per 3.79L); varies with application thickness
• Film Thickness: 1/16" to 3/16" per application
• Dry Time: 2-8 hours (depending on coating thickness); allow 24 hours to be completely dry to the touch
• Shelf Life: Minimum of 24 months

Packaging Options

• 1 Gallon (3.79L)
• 3.5 Gallon (13.26L)

Clean-Up & Safety

• Clean-Up: Easily removed with soap and water.
• Cautions:
  • Do not apply when surface or air temperatures are below 50°F (10°C).
  • Keep from freezing.
  • Avoid prolonged contact with skin and inhalation of spray particles.
  • Do not ingest. Use only in well-ventilated areas.
  • Keep out of reach of children.

All technical data, recommendations, and support are provided to the best of our knowledge. Rosco assumes no responsibility for any damage or results obtained from the use of this product, as application methods and usage conditions vary.

Additional Resources

• FoamCoat™ Data Sheet
• FoamCoat™ - GHS SDS
• FoamCoat™ - SDS
• The Rosco Guide to Scenic Finishes
• Creating Textured Surfaces
• Case Study: Realistic, Juicy-Looking Meat Props from Foam
• Case Study: Durable, Vibrant, Water-Resistant Halloween Décor
• Case Study: Sculptural Techniques with FoamCoat™
• Case Study: Priming Techniques for Foam Carving with FoamCoat™ and CrystalGel