Rendergrip A is a milky white, single component acrylic emulsion. Rendergrip A is the recommended primer, bonding agent and curing compound for use with Aftek’s range of concrete repair systems. Rendergrip A allows the optimum build of Aftek’s repair mortars. Including Penapatch High Build, Penapatch HB80, Penapatch HB50, Fairing Coat Mortar and Penapatch Panel LW.