SpecPatch Light

Application

Applications Include:

• Interior and exterior use
• Vertical, overhead, and horizontal repairs
• Repairing concrete pipes, curbs, sidewalks, and both formed and precast concrete

Surface Preparation: Ensure the concrete is robust and devoid of foreign substances, including oil, grease, dust, and other contaminants. For enhanced durability, create a notched, reinforced edge around the repair area by saw-cutting 1/8” deeper than the intended repair depth. The surface must be roughened according to the ICRI 310.2 Guideline to a CSP of at least 5 and kept damp without any standing water.

Priming/Scrub Coat: Remove rust from exposed steel reinforcement and coat with SpecPrep SB. The concrete should be damp (SSD) and primed with SpecPrep SB before applying the mortar wet on wet or within the specified open time. Alternatively, a scrub coat of the mixed mortar can be applied to the damp substrate to ensure a strong bond.

Mixing Instructions: Combine 6.75 – 7.25 pints of clean water with each 50-pound bag of SpecPatch Light, adjusting for desired consistency. Use a low-speed drill for mixing, starting with water then adding the mortar, mixing for 2-3 minutes. Only mix what can be used within the product’s setting time. For enhanced durability and resistance, particularly in areas subject to heavy wear, it is recommended to mix with SpecChem StrongBond Acrylic Bonder either neat or diluted.

Application: Apply SpecPatch Light firmly, ensuring it bonds well with the surface. Overfill slightly, then shape the mortar to the desired contour after initial set but while the surface is still workable. Apply in layers up to 1” thick, roughening between layers to improve adhesion.

Finishing/Curing: Texture the repair to blend with the surrounding concrete. SpecPatch Light generally self-cures, though a water-based curing compound compliant with ASTM C309 may be used in dry conditions.