Larsen Blue Weld Crete

When you need new concrete or cement-based materials to bond securely to existing surfaces, Weld-Crete delivers unmatched performance and reliability. As the original chemical concrete bonding agent, it is engineered with a patented polyvinyl acetate homopolymer formulation that creates a powerful adhesive bridge between old and new materials. Ideal for both interior and exterior applications, Weld-Crete bonds new concrete, stucco, terrazzo, tile setting beds, and Portland cement plaster to structurally sound surfaces including floors, walls, steps, columns, ramps, and beams.

One of its greatest advantages is its generous open time, which gives professionals the flexibility to apply the bonding agent well in advance of the new pour—anywhere from one hour to ten days prior. This makes it especially useful for complex projects where reinforcement steel, formwork, or other preparation steps must be completed before concrete placement.

Beyond concrete-to-concrete applications, Weld-Crete also bonds to challenging surfaces such as brick, block, marble, tile, glass block, metal, and even certain soundly adhered paints. Its proven performance is backed by rigorous testing: it withstands freeze-thaw cycles, extreme temperature variations, and exposure to acids and detergents without bond failure. Non-toxic, non-flammable, and fire-resistant, Weld-Crete meets or exceeds key ASTM, military, and government specifications.

Field-proven for decades, Weld-Crete ensures durable adhesion, structural integrity, and peace of mind in demanding construction and repair projects—making it a trusted solution for architects, contractors, and builders.

• Bonds new concrete, stucco, terrazzo, and plaster to existing surfaces
• For interior and exterior use on walls, floors, steps, ramps, and more
• Provides open time of 1 hour to 10 days for flexible scheduling
• Adheres to concrete, brick, block, tile, marble, metal, and glass block
• Proven durable against freeze-thaw cycles, temperature extremes, and chemicals
• Non-toxic, non-flammable, and fire-resistant for safe use
• Meets ASTM, military, and government bonding specifications