Sika Micro-Ultra 15-3 filler paste is a rigid, light weight (low density) system meeting FAR 25.853a for the stringent requirements of the aerospace and aircraft industries. It is an ideal material for repair and surface finishing of interior composites that is qualified to several OEM specifications. It is non-conductive and has excellent bonding and filling qualities with fiberglass, SMC, BMC, RIM, FRP, graphite and Kevlar composites. It withstands vibrations and impact without loss of bond or surface webbing.