west system logo

WEST SYSTEM 409 Microsphere Blend

A pure white, hollow glass bubble-based, low density filler designed for filling and fairing of fibreglass. When the filler is mixed with WEST SYSTEM® epoxy at a ratio of 10% to 25% by weight, it creates a smooth creamy paste for filling and fairing over glass fibre repairs. The cured epoxy/filler is very easy to sand. Being white in colour the cured epoxy filler mix will be hidden easily behind paint or polyester gelcoat, but must be protected by further coats of epoxy if used below the waterline.

409-pile409 Microsphere Blend small crop

409 Microsphere Blend large



Subscribe to our newsletter so we can share with you our unique knowledge and experience of working with epoxy.



New Downloads

Latest PRO-SET news - Autumn 2017

Using fillers
After selecting an appropriate filler for the job in hand with our product selection chart, use it to thicken the epoxy to the desired consistency. Click here for more guidance on using fillers.

To buy WEST SYSTEM products, click here and find your nearest stockist.