Fillers are used to thicken the basic resin/hardener mixture for specific applications. Each filler possesses a unique set of physical characteristics. Thickener (1.7 oz.) $7.57 Thickener (5.5 oz.) $20.45 High-strength Filler (6 oz.) $8.64 High-strength Filler (20 oz.) $20.83 Easy-sanding Filler (2 oz.) $13.11 Easy-sanding Filler (5 oz.) $26.77 Gray Pigment $14.20