3 oz #2596 Unidirectional IM Fabric
Chopped strand mat is most frequently used with polyester resin to quickly build thickness for parts and between layers of fabric for building molds
The 6 oz weight sits at the lighter end of this popular range
At this point in the cure
Woven roving (#223) is another heavy reinforcement option
Polyester Fairing Compound polyester-resins-gel-coats 3 oz #2596 Unidirectional IMPolyester Fairing Compound is a fibrous filler for structural repairs, bonding, and part fabrication. This structural putty is great for rebuilding broken, void, or damaged areas in composites and other materials. Unlike other body fillers, #4100 Polyester Fairing Compound exhibits low shrinkage, high impact strength, and excellent temperature and chemical resistance. It is easy to mix, has very good adhesive qualities, low moisture absorption, and