WELD-CRETE® (Blue Bonding Agent)

Name: Weld-Crete Concrete Bonding Agent Blue Bonding Agent - QT
Brand: Larsen Products Corp.
SKU: 716076210006
Price: 17.5 USD
Availability: InStock

Manufacturer: Larsen Products
Color: Blue
Type: Concrete bonding agent

✅ What Weld-Crete Is

A bonding adhesive designed to bond new concrete, stucco, or cement mixes onto existing concrete.

⭐ Main Uses of Weld-Crete

Bond new concrete to old concrete
- Patching concrete
- Resurfacing slabs
- Adding new pour over old floor
- Concrete overlays
Bond stucco to concrete or masonry
- New stucco over old painted or unpainted concrete
- Stucco patching
Bond masonry repairs
- CMU block repairs
- Concrete steps patching
- Foundation patching
Interior & exterior use

Why Weld-Crete Is Used

Very strong bond (better than slurry mixes)
Easy brush/roller application
Replace old “slurry coat” bonding technique
Saves time and increases adhesion strength

PRODUCT DETAILS:

LARSEN PRODUCTS CORP.
WELDCRETE 21000 CONCRETE BONDER
Bonds new concrete, stucco, tile setting beds &-
terrazzo to any structurally sound surface
Use for bonding setting beds for ceramic tile,-
bonding portland cement plaster & stucco mixes,-
& to bond to surfaces such as brick, block, tile,-
marble , metal, glass block, soundly adhered paint-
& silicone.
Polyvinyl acetate homopolymer formula
Can be painted on in a single application 1 hour-
to 10 days prior to concrete placement
Astm c-932 tensile bond strength
Astm c-78 flexural bond strength
Astm c-1042 shear bond strength
Astm c-109 temperature range
Covers approximately 200 to 300 sq. Ft. Per gallon depending on method of application, temperatures, porosity and texture of the substrate.
Blue and non-bleeding

Weld-Crete is a concrete bonding agent used to bond new concrete, stucco, terrazzo, or tile setting beds to existing structurally sound surfaces, both interior and exterior.
Here’s a detailed look at its applications and benefits:
Primary Uses of Weld-Crete
• Bonding New Concrete to Old Concrete
• Ideal for overlays, patching, and resurfacing
• Used on floors, walls, columns, beams, steps, and ramps
• Stucco and Plaster Applications
• Bonds portland cement plaster and stucco mixes to surfaces like brick, block, tile, marble, and glass block
• Tile Setting Beds and Terrazzo
• Ensures strong adhesion for ceramic tile and terrazzo installations over concrete or masonry
• Specialty Surfaces
• Can be applied to soundly adhered paint (non-water-soluble), metal, and glass block
• Used in bonding cement mortar beds to smooth concrete for rigid foam insulation or radiant heat systems
✅ Key Benefits
• High Bond Strength: Proven tensile, flexural, and shear bond strength under ASTM standards
• Extended Open Time: Allows flexibility in scheduling reinforcement and formwork placement
• Interior and Exterior Use: Versatile for a wide range of construction and repair projects
• Ready-to-Use: Water-based emulsion with easy brush or roller application
⚠️ Application Tips
• Apply to clean, structurally sound surfaces
• Avoid use over water-soluble paints like calcimine or casein
• Follow manufacturer’s guidelines for drying time and coverage (typically 200–300 sq ft per gallon)
Weld-Crete is a trusted solution for professionals needing reliable concrete bonding in demanding environments. If you’re planning a specific repair or installation, I can help you determine if Weld-Crete is the right fit.

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