An Extender is not always necessary for AURA. However if you feel the need to use one, use the AURA Extender which is formulated for that product. The Gennex system in AURA is like no other and could be sensitive to generic extenders. Keep in mind that you have cut in and let it dry, then roll into a dry cut. It is very important that you do not roll into a wet cut or the roller will pick it back up. There is an application guide stuck to the lid of the can, be sure to read it first.
Vandi.
BM Rep.