Probuild Microballoons 30g

Glass Bubbles, also known as microspheres or microballoons are used to bulk-out or thicken resin systems including epoxy, polyurethane and polyester, reducing their density and making them easier to sand. Added to laminates they can provide a smoother finish whilst in castings they improve dimension stability, whilst reducing the weight and cost of the finished part.

Combined with epoxy, microspheres make a very lightweight yet strong filler. Combined with polyester or epoxy they make a coating that can be easily sanded.