@quicksandflooring: Will it crack and fall out?? No. But you have to follow these steps: - Prep your floor. This means sanding it first. - Remove any old gunk trapped in the gaps. - Use a FLEXIBLE gap filler like Berger Seidle Pak Stop. - Allow to dry sufficiently. - Seal the floor with a high quality coating system. We use FlexPrimer, SmartHome and CeramicStar for a beautiful, clear, natural look. Game changing. Find Products here: www.quicksandsupplies.com Get a quote from us here: www.quicksandflooring.com.au #floorsanding #hardwoodflooring #gapfiller #flooring #homerenovation