CRACKING SMDOWN YOUR STAIRCASE REPAIR! There’s always issues along your staircase! I’ve been using this method for a while now a I can say it’s not let me down yet! CT1 to pack out as it hold and sticks to absolutely everything it’s really strong and has good flexibility to prevent cracking! Toupret Fibacryl to fill out, again it’s really strong and has flexibility to it! Fill it flush to help with the following process ( sanding ) because of its flexibility it does drive with a slight rubbery f