How to Fix Hollow Spots in Concrete – Easy Slurry Repair Method

Fix hollow spots in concrete and restore a smoother, better looking surface with this simple slurry mix! 00:00 – Introduction – Fix Imperfections in Concrete 00:51 – What We Are Fixing 01:40 – Getting Started – Wetting It Down and Why We Do It 02:36 – A Repair Mix Slurry – Fortified Cement Paste 03:38 – Making the Repair Mortar 05:05 – Applying the Fortified Cement Repair Mix 06:15 – Smoothing the Slurry Layer 08:09 – Finishing of Repaired Surface 10:23 – Sanding for Rough Spots 12:16 – Testing the Repaired Surface 12:54 – Conclusion Learn how to repair hollow spots and smooth surfaces of cast concrete using a simple cement slurry mix. Whether you're restoring a concrete bowl, statuary, planter, or any cast piece with surface voids, this guide shows a reliable, easy-to-repeat technique that delivers strong, long-lasting results. In this step-by-step tutorial, we fix the imperfections left behind from sand casting and rebuild the interior surface so it bonds tightly, cures properly, and finishes clean. This method uses a 1:1 slurry mix of Portland cement and sand, fortified with PVA glue and just enough water to reach the right consistency. You’ll see how to press the mix into the hollow spots with a margin trowel for maximum adhesion, smooth it with a sponge and a paint brush. It is left to cure for a week at which point it is sanded to remove rough spots and lines. We wrap up with a sound test of the bonded surface and discuss optional finishing choices, including paint. This simple method can transform rough, hollow, or uneven concrete into a solid, cleanly finished piece that’s ready for display or use. Referral links to products featured in Creating Concrete videos - As an Amazon Associate I earn from qualifying purchases. https://amzn.to/4rMbkRn – Weldbond (160 mL / 5.4 oz) https://amzn.to/48xZ0wz – Weldbond (3 L / 101 oz.) https://amzn.to/4prdzIi – basic water-based concrete sealer https://amzn.to/4iUZwZ6 - advanced water-based concrete sealer https://amzn.to/3xvpE96 – Masonry / grout sponges https://amzn.to/4ayjR1z – Sea sponge set for texturing https://amzn.to/3TGrZ8H – Marshalltown margin trowel (rubber grip) https://amzn.to/3VEhntP – Marshalltown margin trowel (wood grip) https://amzn.to/3xujXbx – Marshalltown point trowel (rubber grip) https://amzn.to/3TCp9Se – Marshalltown point trowel (wood grip) https://amzn.to/4ale5A4 – Marshalltown 12" square trowel https://amzn.to/4avz2Is – fine sponge float https://amzn.to/3VIEmDX – universal mold release https://amzn.to/3TQ9e30 – silicone mold release https://amzn.to/3J7Q2II – sonite sealing wax https://amzn.to/4iFAVqj – fake wood texture tool set https://amzn.to/43H3cpO – powdered concrete pigments https://amzn.to/4cDYz3T – Quikcrete red pigment https://amzn.to/4cIlDOK – Quikcrete brown pigment https://amzn.to/43EuVHL – Quikcrete charcoal pigment https://amzn.to/4cyIKeG – bulk acrylic paint set https://amzn.to/4aB9oBU – airbrush and compressor kit https://amzn.to/3U29Y6c – high range water reducer https://amzn.to/49nsDOq – Budget mortar mixer and paddle https://amzn.to/4cFsYPi – 5 gallon mixing bucket https://amzn.to/3TGModV – fiberglass reinforcement 3/4" strands https://amzn.to/4cEd87w – alkalai resistant chopped glass fibers 3/4" https://amzn.to/3J0YzNR – perlite 4 cubic foot bag (coarse) https://amzn.to/3xiCYxI – vermiculite 4 cubic foot bag (coarse) https://amzn.to/4aHPFk9 – RTV 100% silicone (10 pack) https://amzn.to/3VKbWcS – Smooth-On Vytaflex 30 urethane rubber https://amzn.to/3xiEhg6 – Smooth-On skin safe liquid silicone rubber https://amzn.to/3vtmang – interlock stone mold https://amzn.to/3VE04cj – slate texture skin https://amzn.to/3J0QEAb – bluestone texture skin https://amzn.to/3xmZfdR – basalt texture skin #Creatingconcrete #concreterepair #diy #repairtutorial #concrete