Phenolic Micro Balloons by MAS Epoxies is a low-density bulking agent that creates a lightweight fairing compound when mixed with epoxy that can be easily sanded and shaped. It is ideal for filling cracks, fixing chips or dings, shaping, and resurfacing. Once properly cured, paint may be applied directly over repaired surfaces with no prepping.

MAS Micro Balloons is made of hollow microscopic Phenolic spheres, which have a purple-brown color. It has a great strength to weight ratio, though it is not recommended for gluing or weight bearing bonding.

Available in Quart and Half Gallon sizes.