404 High-Density Adhesive Filler is an epoxy thickening additive developed for maximum physical adhesive properties in hardware bonding where high-cyclic loads are anticipated. It can also be used for filleting and gap filling with epoxy where maximum strength is necessary. Color: off-white. Please note: Delivery of West System Epoxy products within Ireland only. If a colour is out of stock, contact us directly and we can try and get it for you in the shortest delays.