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Detailed Non-Skid Broadcast Instructions

 For a printer friendly version of the written instructions, please access the PDF Library.

 
This process is where you apply a coat of FlexKrete with rollers, and immediately broadcast sand, quartz, aluminum oxide, vinyl chips or other aggregate onto the wet FlexKrete. After the FlexKrete sets up, you will broom off any loose aggregate, and then seal the decorative finish with a clear top-coat like FlexSealer1000 or FlexAspartic.

Site Preparation

Ensure that Surface is Clean and Dry:  As with all FlexKrete applications, you need clean concrete.  Many broadcast applications are done on interior floors that have been previously sealed, painted, or may contain contaminants like hydraulic fluid. You must ensure clean white concrete by bead blasting and/or grinding, brushing, brooming and vacuuming clean.

Tape Area:  You will want to use duct tape to symmetrically tape off the area accurately.  Anything not taped will end up being very hard to remove, and anywhere misaligned tape is on an area to be covered it will look sloppy.

Mixing and Applying FlexPrime

Estimate Amount of FlexPrime: You are going to mix enough FlexPrime to paint a VERY THIN coat that completely covers the concrete within the repair area. A simple way to estimate the amount needed is to estimate approximately 300 square foot of coverage per gallon. (38 sf. a pint) (75 sf. a quart).

Mix and Apply FlexPrime: Mix equal parts of A & B for 1 to 3 minutes, and apply a VERY THIN COAT with a roller. Make sure that the FlexPrime is not puddled at all. If you are unsure, a good policy is to lightly roll a dry roller over the area after applying. If you are priming a lot of area on a hot day, try to only mix up enough FlexPrime that can be applied within 15 minutes. If the FlexPrime starts to thicken up DO NOT apply it DISCARD. For easy application and penetration, you may thin the FlexPrime after mixing A & B by adding up to 10% acetone by volume.

At this point you can lightly sprinkle some sand onto the FlexPrime which will help you on the next step with a high build coat of FlexKrete. You should let the FlexPrime become very tacky before applying FlexKrete.

Mixing and Applying FlexKrete

Estimate FlexKrete Coverage: The goal is to apply the thickest coat of FlexKrete you can, without having puddles or ridges. Typically, you should try to apply the FlexKrete at about 75 square foot a gallon for a medium grade sand broadcast. A normal thickness for coating-broadcasts are 10-mil to 20-mils. This translates to 80-160sq. ft. per gallon, depending on the broadcast material and substrate condition. Since you won’t know how much EXACTLY the concrete will accept, when you pour out the ribbons – hold back on pouring about 10% to the end of the roll area.

Pre-Mix FlexKrete Before Using: Even if you are using Clear FlexKrete, you must pre-mix the bucket for 60 seconds.

Broadcast Application: Catalyze the FlexKrete using a rectangle thin-set paddle. Pour out ribbons, then with 3/8" knap roller apply the FlexKrete thickly and evenly without leaving uneven ridges or puddles. Back roll material then IMMEDIATELY broadcast the aggregate to refusal, onto the wet FlexKrete. It is a good idea to have the “thrower” start the broadcast on the first portions of the rolled areas as soon the “roller” gets ahead a few feet. When you broadcast the quartz, sand, or aluminum oxide, ensure to initially throw the sand up in the air so it lands flat upon the surface and does not create any ridges from the broadcasting. Two coats are recommended for extreme vehicle traffic or a richer color and the most durable finish.

Finishing

Remove Tape: If possible, remove the tape before FlexKrete completely sets up or the tape may be stuck to the pavement in spots. A utility knife or multi-tool comes in handy to remove stubborn tape.

Broom Clean: When the FlexKrete is sufficiently set up, usually within 30 minutes to 1 hour, you should use a very stiff broom and leaf blower/shop vacuum to completely remove any and all loose aggregate.

Add a Clear Topcoat: We offer FlexSealer1000 and FlexAspartic.

Applying FlexSealer 1000: When the exposed broadcast is completely free of loose particles, you may seal the new floor with FlexSealer1000. You may use an airless sprayer or a roller. If using a roller, use a ” to 5/8” knap. Pour out small puddles of FlexSealer onto the floor starting at one end of the area and lightly and slowly pull the FlexSealer1000 puddles toward you. Do not overwork the material or you will create air bubbles. Do not leave the sealer on thick. If you want a high shine thick coating it is better to do 2 or 3 thin coats with sufficient drying time between them.

TIP: Retain Expansion Joints



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On this page we have shown you how to easily repair many damaged surface issues on concrete. You can now repair crazed concrete, hairline cracks in concrete, and repair small cracks in concrete. FlexKrete is better than epoxy concrete repair for outdoor applications because it is unaffected by UV rays. FlexKrete non skid resurfacing is an attractive way to repair cracks and seal a concrete driveway or entryway.
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