River Rock Molds for Concrete – Cast Natural-Looking Stone with Ease
Bring the look of riverbeds and rustic streams to your concrete projects with River Rock Molds by GlobMarble. These USA-made polyurethane molds let you produce lifelike river rock veneers for fireplaces, columns, landscaping walls, or interior features.
Each mold captures the smooth, rounded texture of natural river stones — ideal for adding an organic, tranquil look to residential or commercial builds. Durable and reusable for 100+ castings, these molds are perfect for both DIY users and professional veneer producers.
Popular Applications
Fireplace surrounds with river rock texture
Outdoor water features and garden walls
Rustic columns, pillars, and mailboxes
Commercial interiors and lodge-style spaces
Landscaping edging and curved retaining walls
How to Choose the Right River Rock Mold
Stone Size & Variation. Choose molds based on the desired look — we offer options with mixed stone diameters and various grout spacing for both uniform and natural layouts.
Surface Texture. All molds feature high-resolution impressions that replicate the rounded contours and soft edges of real river rocks.
Material Compatibility. Use with concrete, GFRC (glass fiber reinforced concrete), cement, or gypsum. Always apply a mold release agent before pouring.
Application Area. Suitable for both vertical and horizontal surfaces. River rock molds can be used on walls, columns, benches, and custom forms.
Coloring Techniques. Use integral pigments for base tones, then layer antique stains to highlight natural depth and variation. Seal for long-term durability.
Top Reasons to Choose GlobMarble for River Rock Molds
Authentic River Stone Texture. Carefully sculpted molds capture the natural flow, size, and curvature of riverbed rocks.
Reusable for 100+ Castings. Made from flexible, tear-resistant polyurethane built for production-scale use.
Made in the USA. All molds manufactured in our Brooklyn facility under strict quality control.
Perfect for DIY or Contractors. No special tools required — easy to use with standard concrete or GFRC mix.
Fast Coverage. Mold formats available for both individual stones and veneer-style panels for efficient casting.
Great for Rustic & Organic Designs. Excellent for lodge-inspired, cabin-style, or natural garden spaces.
Quick Shipping. Orders typically ship same or next business day. Free shipping on U.S. orders over $200.
Expert Support Included. Tutorials, application guides, and material recommendations provided with every order.
Ordering & Shipping Process
How to Order. Browse our river rock molds, select size and style, add to cart with any desired colorants or sealers. Proceed to secure checkout.
Shipping Times
East Coast: 2–3 business days
Midwest & South: 3–4 business days
West Coast: 4–5 business days
Free shipping on $200+ in the continental US
Worldwide shipping available
Returns & Support. Return unused molds within 30 days. All GlobMarble molds include live chat and phone support from our team.a
Frequently Asked Questions
Q: What makes river rock molds different from other stone molds?
A: River rock molds feature rounded, smooth stone textures designed to replicate stones shaped by water — ideal for rustic or natural designs.
Q: Can I use these molds vertically?
A: Yes — when used with a vertical overlay mix, river rock molds can be applied to walls, fireplaces, columns, and more.
Q: Are these molds reusable?
A: Absolutely. With proper care and use of mold release, our polyurethane river rock molds are rated for over 100 pours.
Q: What mix should I use?
A: Standard concrete, lightweight GFRC, or casting plaster (for indoor décor) all work well.
Q: How do I color the cast stones?
A: Start with integral pigment in the mix, then apply surface stains and sealers to highlight depth and realism.
