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Silverlake 11x17x7 Craft Foam for Styrofoam Block Projects

  • Based on 855 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Oct 22 – Oct 23
Order within 16 hours and 5 minutes
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Size: 11x17x7in


Color: White


Features

  • PROFESSIONAL-GRADE: Premium hard foam blocks (not soft/squishy foam) designed for professional artists, model makers, and crafters. Dense, rigid material perfect for precision work.
  • VERSATILE & DURABLE DESIGN: Made from high-density EPS (Expanded Polystyrene) foam (the professional-grade material commonly searched for as styrofoam blocks). Can be sanded, shaped, and painted. Water-based paint and sealant safe. Cuts cleanly with a hot-wire knife for precise detailing.
  • PERFECT FOR PROFESSIONAL & EDUCATIONAL PROJECTS: Ideal for architectural models, dioramas, props, sculptures, and educational displays. Creates clean, precise bases for scale models, railroad scenery, and professional presentations. Superior surface finish accepts detail work and various coatings.
  • PREMIUM SPECIFICATIONS: Professional 1-pound density foam ensures consistent quality throughout. Single piece measures 11x17x7 inches. Lightweight yet sturdy enough for permanent displays and handled projects. Weather and moisture resistant - withstands freeze-thaw cycles.
  • MULTIPLE APPLICATIONS: Excellent for model making, scenic design, STEM projects, theater props, art installations, and professional displays. Perfect for wargaming scenery, model railroad terrain, hydroponics, aquaponics rafts, and specialized packaging. Accepts adhesives well and holds detail. Suitable for both precision crafting and larger projects including small-area insulation.

Description

All water-based paints, glues, and coatings may be used. Polystyrene may be painted and coated for either a finishing or protecting effect. May be coated with paints, glitters, paper mache, plaster of Paris and more. Caution - Petroleum-based paints and glues will melt polystyrene. While Expanded Polystyrene (eps) foam can be cut with a knife or saw, these methods will create shedding or messy dust. For precision shaping with clean lines, it is best to shape with a hot wire tool of some kind that melts a clean and smooth edge to your project. Simply draw out your design and follow with the hot wire tool. These cutting tools are readily available on Amazon under the search term, Hot Wire Cutter. Cut pieces can be stacked to create incredible 3-dimensional designs and Diorama sets. Whether your project is a large scene or a smaller school project, pieces can be shaped and glued together with hot glue, Elmer's glue, Mod Podge, or any non-solvent-based glue to create more dimension and texture. As a general rule, if your glue or coating has strong fumes, it is a solvent base and will likely melt your foam and not provide optimal results. Polystyrene is a firm, rigid foam that can support great amounts of weight, yet remains light and easy to transport and work with. With some simple tools, such as soldering irons, hot knives, and wood-burning tools, textures can be melted into your polystyrene to create realistic textures. Many customers use our foam for creating small-scale sets for action figures or game play as well as model railroading and architectural models. Polystyrene is commonly used as cost-effective 3-dimensional signage. A common question we receive is "how much weight will polystyrene support?" Polystyrene provides excellent strength and is commonly used underneath highways and in heavy construction. It will show visible dents, but can support the weight of a human without crushing or breaking. For added durability, there are numerous foam coatings ranging from concrete, Dryvit, plaster of paris, specialty foam coatings, latex paint, etc. that will create a hardened shell on your foam which can withstand many years of repeated use. The foam in this listing is 1lb per cubic foot density. Items can be inserted into the foam for display or organization. Because of its light weight and ease of use, EPS polystyrene is commonly used for display projects such as centerpieces, retail displays and even entomology and butterfly collections. EPS foam is cost-effective and has a clean, white appearance, which makes it perfect for many crafting and display projects. Polystyrene provides a rigid, yet protective support for items such as gift baskets, school projects, model railroad terrain and many other items that require a height adjustment for optimal display.

Product Dimensions: 11 x 17 x 7 inches


Item model number: 11x17x7


Item Weight: 12.3 ounces


Manufacturer: SilverlakeLLC


Date First Available: June 21, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 22 – Oct 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Exactly as shown
Size: 11x17x7in Color: White
Exactly as described. Worked well as a riser base for trophy display
Reviewed in the United States on April 5, 2026 by Sally G Griffin

  • Arrived promptly
Size: 11x17x7in Color: White
Held up well as long as it could.
Reviewed in the United States on August 19, 2026 by Blue Steele

  • Sturdy useful foam
Size: 11x17x7in Color: White
Great for crafting!
Reviewed in the United States on May 20, 2026 by Janice M. Bonner

  • quality and value
Size: 11x17x7in Color: White
As described, great value easy to use highly recommend Fred
Reviewed in the United States on May 28, 2025 by frederick L lavallee

  • Great product for crafting
Size: 11x17x7in Color: White
It’s not originally what I was looking for but I was able to use it for another project and worked great I would highly recommend this seller. It was delivered on time for a fair price.
Reviewed in the United States on August 3, 2024 by Stephen W.

  • Read the instructions first
Size: 11x17x7in Color: White
After I read the instructions, I purchased a hot knife to cut this to the sizes I needed. Even though I am new at this, I did fairly well. but could not have cut the foam without a hot knife.
Reviewed in the United States on April 5, 2026 by Peter

  • Crafting item
Size: 11x17x7in Color: White
Good for crafting
Reviewed in the United States on March 6, 2026 by Carole LaHue

  • Made well
Size: 11x17x7in Color: White
Easy to use does excellent with cad and cad and hotbwire
Reviewed in the United States on March 15, 2026 by Shar, Ohio

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