The West System 407 Low Density Filler microballoons product is a blend of various fillers but is based upon phenolic resin hollow spheres which have a distinctive reddish/brown colour. This filler is particularly useful for cosmetic fillet joints and fillers in wood construction as well as producing structural adhesives for less demanding applications on softer timbers such as cedar. When storing microballoons, it is particularly important to exclude air as they readily absorb atmospheric moisture which will affect the performance of the filled mix. Product Details Composition: Phenolic Spheres Appearance: Red/Brown Powder Particle Size: 50 microns Bulk Density: 100g/litre Availability: 407 0.15 kg (approx. 1.1 litre) 407A 0.70 kg (approx. 4.5 litres) 407B 3.5 kg (approx. 33 litres) 407C 15.0 kg (approx. 150 litres)
