Can't get into that tight spot when casting or molding? Or just want to round out some corners and edges before laying heavier sheet down? If so then chopped strands are perfect.
 
Ideal for reinforcing difficult to reach areas of castings in resin or plaster.
Can be added to resin (namely polyester) to create a paste that can be used for awkward areas
Adds additional strength to casts and mold
 
Always wear proper PPE when using chopped strands