DCI Hard Trowel Floor Prep is pre-treatment used to chemically-profile exceptionally smooth machine-troweled concrete floors and ultra-smooth pre-cast countertops. Surfaces that do not readily absorb water or have dark spots caused by excessive troweling require either etching with Hard Trowel Floor Prep or sanding with an 80-grit pad prior to acid staining or sealing. The surface should have a light sandpaper texture before proceeding.
Dirty floors with paint overspray or light dry wall mud contamination can be cleaned using DCI Hard Trowel Floor Prep in addition to etching the concrete for acid stain or concrete sealer application.
Mixing Instructions and Coverage Rates: For a full strength concentration, mix each packet with the appropriate amount of water (1 quart bag per quart of water, etc.) in a 5 gallon plastic bucket until material is completely dissolved. The product should only be used full strength for heavily soiled or burnished concrete floors. Always conduct a test area prior to the actual project application.
For most very smooth, machine troweled floors, add one part full strength DCI Hard Trowel Floor Prep to two parts water (2:1). Mix thoroughly. Use a more concentrated 1:1 solution for intense etching action on excessively smooth floors with black spots and/or obvious surface fractures. Each gallon, diluted or full strength, will cover approximately 200 sq. ft. per gallon.
DCI Hard Trowel Floor Prep can cause a slight darkening of the concrete after application. This in no way inhibits acid stain reactivity or sealer adhesion. Apply 2:1 for cleaning floors and as a pre-treatment for staining concrete countertops and sealer application.
Application: Clean the concrete surface in an anticipation of staining with a DCI Concrete Cleaner and water solution. Rinse. Using a foam brush, apply small test areas with different concentrations to determine which dilution produces the best staining results. The product should be sprayed from a pump-up sprayer or spray bottle for countertops in a consistent manner over the entire surface for uniform etching/cleaning. DCI Hard Trowel Floor Prep should not be poured directly onto the floor or countertop and swept over the surface. Allow the product to remain active for 20 minutes and neutralize with clean water. Use a wet/dry vacuum or sweep off the surface to remove and allow to dry.
Key DCI Hard Troweled Floor Prep Features:
• Quickly and easily prepares machine trowled concrete for optimal acid stain penetration
• Perfect pre-treatment for acid staining machine-troweled basement and garage floors
• Odorless product that can be used for both interior/exterior concrete
• Can replace sanding and grinding on most paint and mastic-free floors
• Clean lightly paint and drywall contaminated or dirt soiled floors before acid staining or sealing
• Prepare excessively smooth concrete countertops for acid stain
• Profile machine troweled floors for improved concrete sealer adhesion