Rosco FoamCoat – Sample Instructions & SDS

Rosco Professional Scenic Coatings

FoamCoat Foam Hardener & Protective Coating (7100)

FoamCoat is Rosco's non-toxic, water-based coating that turns soft foam into a hard, durable, carvable surface. It seals and protects polystyrene and styrofoam — as well as primed wood, concrete, fibreglass, papier-mâché, muslin and many other materials — giving props, scenery and architectural shapes a tough, paintable shell with an off-white matte finish.

Water-Based Hardens Foam Carvable & Sandable Flame Retardant • Water Resistant

About Your Sample

Your sample has been decanted by Creative Film & Theatre Solutions from genuine Rosco FoamCoat stock. It is supplied so you can evaluate how it hardens, finishes, carves and takes paint before purchasing a larger quantity.

Test
Enough to coat a small foam test piece Coverage depends on the number of coats, foam porosity and film thickness.

Apply your sample to a foam offcut or a small section of your build, let it cure, then check the hardness, finish and how well it sands and paints before coating the full piece.

Sample containers are supplied for product evaluation and differ from Rosco's original retail packaging.

What FoamCoat is Used For

FoamCoat gives foam and lightweight scenic materials a hard, protective skin that can be carved, sanded and painted.

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Props & Sculptures

Harden and protect carved foam props so they survive handling and touring.

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Carved Foam Scenery

Seal polystyrene and styrofoam scenery with a durable, paintable shell.

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Architectural Shapes

Letters, columns, mouldings and theming elements that need a tough surface.

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Set Pieces

Also coats primed wood, concrete block, fibreglass, papier-mâché and muslin.

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Texturing

Can be used as a texturing agent to build surface detail and relief.

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A Base for Paint

Creates a sound, sealed ground ready to tint or overpaint with Rosco paints.

Why Scenic Builders Use FoamCoat

Hard, Durable Shell

Transforms soft foam into a tough, hard-wearing surface that resists damage.

Carvable & Sandable

Carve it for detail and sand it smooth once dry to refine your shape.

Flame Retardant

FoamCoat is non-flammable and inherently flame retardant.

Water Resistant

The cured coating is water resistant for added durability.

Paint-Compatible

Fully compatible with all Rosco paints as tints or surface coatings.

Non-Toxic & Water-Based

Water-based with simple soap-and-water clean-up.

Preparing the Surface

FoamCoat bonds best to a clean, sound surface. Before applying your sample:

Clean & dry the surface

Make sure the foam or material is clean and dry before coating.

Prime wood & plastic first

Wood and plastic should be primed first with Rosco Tough Prime for the best bond.

Key difficult surfaces

Lightly sand difficult or glossy materials to give the coating more "tooth".

Remove dust

Vacuum and wipe away sanding dust before you start coating.

Test on an offcut

Apply your sample to a foam offcut and let it cure to confirm the result.

How to Apply FoamCoat

Before applying

Stir well and apply straight from the container.

Build the coating in successive thin coats, especially over fine detail, so you protect the surface without obscuring it. Typical film thickness is approximately 10–50 mils.

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Brush

Work the coating into the surface and detail with a good-quality brush.

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Roller

Roll an even coat over larger, flatter areas.

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Hopper Spray Gun

Full-size FoamCoat can be applied with a hopper spray gun for larger builds and texture.

Using your sample: a sample pot does not hold enough product to run through a hopper spray gun — apply your sample by brush for testing. Hopper spray is suited to full-size FoamCoat on larger jobs.
Building coats over detail

Apply several thin coats rather than one heavy one. Thin coats preserve fine detail while still building a strong protective layer. Allow each coat to dry before adding the next.

Carving, sanding & texturing

Once dry, FoamCoat can be carved to add detailing, sanded smooth, or used as a texturing agent to build surface relief. When sanding the dried coating, wear suitable dust protection (see Important Information).

Tinting & painting over

FoamCoat is fully compatible with all Rosco paints. Tint it with Rosco paint for a coloured coating, or leave it to cure and overpaint it with any Rosco scenic paint.

Coverage

Small foam piece Approximate coverage from your sample, depending on coats and foam porosity.
~5–14 m² Approximate coverage per 3.79 L — toward 14 m² for thin coats, around 5 m² for heavy, textured builds (roughly 10–50 mils film thickness).
Coverage can't be given as a single figure — it depends mainly on how thickly FoamCoat is applied, along with the number of coats, foam porosity and surface texture. As a guide it runs roughly 5–14 m² per 3.79 L — nearer 14 m² for thin coats, and around 5 m² for heavy, textured builds. Estimate from the film thickness your project needs.

Drying & Curing

2–8 hrs Approximate drying time, varying with coating thickness.
24 hrs Allow a full 24 hours for the coating to fully cure.
Thicker coats, cooler temperatures, high humidity and poor airflow will all increase drying and cure time. Allow each coat to dry before recoating, carving or sanding.
Apply in thin, layered coats — not one thick coat. Building FoamCoat up in several thin coats dries and cures far more evenly and reliably. A single heavy coat can skin over on the surface while staying soft underneath, trapping moisture and greatly extending the cure time. Let each thin coat dry before adding the next.

Clean-Up

Clean with soap and water

FoamCoat cleans up easily with soap and water. Clean brushes, rollers, spray equipment and tools promptly before the coating dries.

Storing Your Sample

Close the container securely after use and store it away from children. Protect FoamCoat from freezing. Rosco publishes a shelf life of at least 12 months for sealed product.

Because the sample has been decanted from Rosco's original container, it is intended for evaluation rather than long-term storage. Keep the lid and rim clean so the container reseals correctly.

Important Information

Read Before Use

  • Test hardening, finish and adhesion on a foam offcut first.
  • Prime wood and plastic with Tough Prime before coating.
  • Protect the product from freezing.
  • FoamCoat's Safety Data Sheet carries a "Danger" classification. It contains limestone and a small amount of crystalline silica — the key hazard is dust created when sanding the dried coating.
  • Wear respiratory protection (a dust mask/respirator) and eye protection when sanding dried FoamCoat, and work with good ventilation.
  • Use gloves to avoid prolonged skin contact; do not ingest.
  • Keep out of reach of children.
  • Read the current product information and SDS before use.

This page provides practical introductory guidance. It does not replace Rosco's current product documentation or Safety Data Sheet.

Safety Documentation

Safety Data Sheet

Please read the current Safety Data Sheet and product instructions before using Rosco FoamCoat. FoamCoat is covered by Rosco's Scenic Coatings Safety Data Sheet.

VIEW / DOWNLOAD SCENIC COATINGS SDS → ALL ROSCO SDS →

These links open Rosco's maintained product resources. Always check that the document is appropriate for your location and current application requirements.

Need Help?

Not sure whether FoamCoat is right for your build, or how many coats you need? Creative Film & Theatre Solutions is Rosco's agent and distributor for Australia and New Zealand. Contact us before starting your full project for help with product selection or application.

Creative Film & Theatre Solutions

Exclusive Agents of Rosco Australia & New Zealand
5A Sefton Road, Thornleigh NSW 2120
P: 02 9906 6262

More Scenic-Coatings Information

Explore our guides for more help selecting and using Rosco scenic coatings.

SCENIC COATINGS GUIDE → FOAM COATING: CHOOSE & APPLY →
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All technical data, recommendations and service are accurate to the best of our knowledge. Rosco assumes no responsibility for results obtained or damage incurred from use since method of application and use are beyond our control.