Microballoons are hollow phenolic resin spheres which have a distinctive reddish/brown colouration. This makes them particularly useful for cosmetic fillet joints and fillers in wood construction, as well as structural adhesives for less demanding applications on softer timbers such as cedar. Although not as waterproof as glass bubbles, microballoons are often preferred for their excellent sanding characteristics. Microballoons are not normally used with polyester or vinylester resins because they can be subject to styrene attack which may cause the spheres to collapse. 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. Hollow spheres Increase the volume and reduce the density of any resin system and are used to make adhesive mixes and filling & fairing mixes. ¬ Microballoons: Brown microsphere filler powder used to make glues or paste fillers ¬ Glass Bubbles: White microsphere filler powder used to make glues or paste fillers Short Fibres For adding strength to a resin and hardener mix used as a structural adhesive, short reinforcing fibres are often added which act in a similar strengthening way to the long reinforcing fibres used in composite construction. ¬ Microfibres: Cellulose fibres used to make adhesive mixes Flow Modifiers The most common material for modifying the flow properties of a resin mix is colloidal silica. This is a very fine powder which is added in conjunction with other fillers to ‘thicken’ mixes and reduce their flow on vertical surfaces (increase thixotropy). ¬ Colloidal Silica: Fine, anti-sag, filler powder. Use in combination with other filler powders

Price shown: 1 PCS - 2L

Microbaloons

hollow phenolic resin spheres

Glass Bubbles