Yes. In fact, it is recommended that the floor/casting lab of all tilt-up projects be cured with Silcoseal cure and bondbreaker. The cure coat is the most important coat and will provide the foundation for the subsequent bondbreaker coats.
Both Silcoseal Select and Silcoseal 2000F meet the modified moisture retention requirements of ASTM C309.
The preferred method for applying Silcoseal bondreakers is with a Nox-Crete Perfect Power Sprayer or with one of our hand held sprayers, the Excel 130, Perfect or Ideal Form and Concrete Sprayer. Each of these sprayers comes equipped with a spray nozzle appropriate for a uniform bondbreaker application.
In the tilt-up industry, the term “osmotic effect” refers to the migration of water out of a tilt-up wall panel and into the casting slab during the critical panel concrete hydration process. A gradient is formed when wet concrete from a freshly placed wall panel is cast against a casting slab with lower water content. This results in water being drawn out of the panel concrete and into the casting slab through a process called osmosis. The moisture concentration difference between the wall panel and casting slab is directly related to the osmotic force or pressure attained to reach equilibrium between the two slabs. The “osmotic effect” is the incomplete hydration of the cement on the down side panel surface resulting from the loss of water due to migration into the casting slab through osmosis. Damage caused by the “osmotic effect” can range from minor panel surface defects such as dusting to complete skin pull-off, as deep as 1/16 inch in depth in the more severe cases.
No. Silcoseal bondbreakers do not contain any wax. However, some manufacturer’s bondbreakers do contain wax. Wax is difficult to remove and often interferes with the adhesion of floor and wall panel paints, coatings and patching materials.
Nox-Crete recommends that all exterior tilt-up wall panels be properly cleaned prior to painting. To clean wall panels, mix a solution of trisodium phosphate (TSP) detergent and water by dissolving 0.5 lbs. of TSP in 1.0 gallons of water. The mixture should then be sprayed on the wall panel and allowed to stand for 15-20 minutes. After this time, rinse the TSP residue off the wall panel surfaces using a minimum 2000 psi pressure washer equipped with an oscillating spray nozzle.
chemical solutions to concrete problems
