Concrete Casting / GFRC
A Bench-Ready Guide to Mix Design, Mold Making, and Casting Thin Architectural Concrete
★★★★★4.6 · 5 reviewsby Alumigogo Books
non-fiction
Master GFRC mix design and mold making with this bench-ready guide. Exact ratios, step-by-step procedures, and troubleshooting tables for perfect concrete countertops.
🔒Secure checkout via Stripe
✓30-day money-back guarantee — not right for you? Full refund, no questions asked.
About this book
You're ready to move beyond the basic bag mix and start creating concrete countertops that are thin, strong, and beautiful. Concrete Casting / GFRC is the only book that focuses exclusively on the two skills that separate the pros from the hobbyists: precise mix design and professional mold making. Whether you're spraying a custom countertop or casting a delicate architectural panel, this book gives you the exact numbers and procedures you need to get it right the first time.
Inside, you'll find detailed chapters on the science of GFRC, including the role of glass fibers, pozzolans, and superplasticizers. You'll learn the difference between spray-up and hand-layup methods, and how to choose the right one for your project. The mold-making chapters cover everything from building a melamine form for a simple slab to creating a flexible silicone mold for complex shapes. Every procedure is broken down into numbered steps with exact values—mixing times, cure temperatures, demold windows, and more.
But this book is more than just a tutorial—it's a reference you'll keep on your workbench. The quick-lookup tables give you mix ratios by material, cure times by temperature, and troubleshooting charts for common defects like pinholes, cold joints, and fiber show-through. With this guide, you'll stop guessing and start casting with confidence.
Reader Reviews
Robert Robinson
★★★★★This book is exactly what I needed after my first few countertop attempts looked like a disaster. The mix ratio tables are worth the price alone. I had to search a few times for what I needed, but the troubleshooting section at the back saved me when I got a weird cold joint. Only complaint is I wish there were more photos, but the tables and steps are clear enough.
Sandra Flores
★★★★★As someone who has been doing concrete work for years but never tried GFRC, this book was a game changer. The chapter on spray-up vs hand-layup was so clear, and I finally understand the role of each ingredient in the mix. I followed the countertop project exactly and it came out perfect. This is now my go-to reference on the bench.
Michelle Campbell
★★★★★I've been searching for a book that takes GFRC seriously and doesn't just give you a general overview. This one is deep, practical, and well-organized. The mold making chapters are fantastic—I built a silicone mold for a textured panel and it worked flawlessly. The troubleshooting tables are a lifesaver when something goes wrong.
Brian Miller
★★★★★A solid reference, but I found the first few chapters a bit dense. Once I got to the projects, everything clicked. The melamine form instructions were spot-on, and my slab came out flat and smooth. I docked a star because I think some of the material science could be explained in a more approachable way, but the bench value is high.
Carol Gonzalez
★★★★★Finally, a book that doesn't assume I'm a professional but also doesn't treat me like a beginner. The mix design tables are precise, and the curing chapter made a huge difference in my results. I've already recommended it to two friends in my makerspace. If you're serious about GFRC, this is the book to have on your bench.