Ultra Patch

Application

Surface Preparation: The concrete must be sound and free of all foreign material, including oil, grease, dust, laitance or other surface contaminants. For maximum durability, saw cut the perimeter of the repair 1/8” deeper than the depth of the repair, creating a notched, reinforced edge. Mechanically abrade the surface by an engineered approved method in accordance with ICRI 310.2 Guideline to a minimum CSP 5. All concrete surfaces to be repaired must be in a saturated-surface-damp (SSD) condition with no standing water on the surface.

Priming/Scrub Coat: Thoroughly clean all exposed steel reinforcing of rust and coat with SpecPrep SB. Prepared concrete must be SSD and primed with a spray or brush coat of SpecPrep SB and the repair mortar applied wet on wet or up to the recommended open time (see SpecPrep SB technical data sheet). As an alternative, apply a scrub coat of the properly mixed repair mortar by scrubbing a thin layer into the pre dampened substrate with a stiff brush. Place the repair mortar immediately before the bond coat dries.

Mixing: Mix 5.5 quarts (depending on desired consistency) of clean water per 50 pound bag of material. Mix with a low speed drill. Add recommended amount of clean water into the container, followed by the Ultra Patch. Mix 2 to 3 minutes. Mix only what be used with SpecChem Strong Bond Acrylic Bonder neat or mixed 1 to 1 with water per 50 pounds of powder to increase durability, abrasion resistance and bond strength. The addition of Strong Bond is recommended when using Ultra Patch in thin, horizontal applications subjected to heavy traffic or wear.

Deep/Large Applications: Extending Ultra Patch with clean 3/8” SSD pea stone in large or deep applications over 1”, will create a concrete repair very similar in thermal properties to the concrete itself. Large repair applications over 1” should be extended with 3/8” aggregate up
to 50% by weight (25 lbs) and mixed an additional 2 minutes.

Placement: Trowel Ultra Patch firmly into the prepared area, ensuring intimate contact with the bonding surface. Use slightly more material than is needed and roughly shape during placement. After the initial set, when Ultra Patch is surface hard, shave the material to the desired final shape using a steel trowel. Maximum depth of neat repair mortar is 1” for each lift. Additional lifts can be placed after the original lift has achieved set. The original lift should be left with a rough surface to improve bond between lifts.

Finishing/Curing: Finish the repair material to the desired texture to match the surrounding concrete. Ultra Patch is self-curing under most conditions. In severe drying conditions, use an ASTM C309 compliant, water-based SpecChem curing compound.