Ok, here's what http://www.slurry.com/index.php/paving-services/chip-seal.html says:
"Are there different types? Different stone sizes give different surface textures and are use for different traffic situations these may range from sand, 7mm(1/4 inch), 10mm ( about ½ inch), 14mm ( about ½ inch) 20mm ( about 4/5 inch) and 25mm ( 1 inch).
They are used for different applications.
Binders are selected for the type of job. Binders may be emulsified asphalt or other material, emulsified polymer asphalt, latex modified emulsified asphalt, rejuvenating oil modified asphalt emulsions or hot applied binders with asphalt rubber or polymers.
Seal types include, sand seals for low traffic roads and paths, reseals for existing pavements, modified seals for cracked pavements, multiple coat seals for heavy traffic areas or where a smoother surface is required."
BL: So there are three variables: size of rock/gravel, type of binder, and type of seal.
"Are there different types? Different stone sizes give different surface textures and are use for different traffic situations these may range from sand, 7mm(1/4 inch), 10mm ( about ½ inch), 14mm ( about ½ inch) 20mm ( about 4/5 inch) and 25mm ( 1 inch).
They are used for different applications.
Binders are selected for the type of job. Binders may be emulsified asphalt or other material, emulsified polymer asphalt, latex modified emulsified asphalt, rejuvenating oil modified asphalt emulsions or hot applied binders with asphalt rubber or polymers.
Seal types include, sand seals for low traffic roads and paths, reseals for existing pavements, modified seals for cracked pavements, multiple coat seals for heavy traffic areas or where a smoother surface is required."
BL: So there are three variables: size of rock/gravel, type of binder, and type of seal.