![Phenolic Micro Balloons Phenolic Micro Balloons](https://fascoepoxies.com/images/P/FIL10Q2.jpeg)
Phenolic Microballoons are a filler that is hollow, purple-brown microscopic phenolic speheres. Low density filler. Is ideal for creating a low-density Fairing Compound. When added to epoxy resin, phenolic microballoons have a strong strength-to-weight compound that is easy to sand. Compares to WEST System 407 Low Density Filler.