Green Stuff World Contact Cement 500ml with Brush - Professional Grade Adhesive - Hobby Heaven ???? GREEN STUFF WORLD CONTACT CEMENT 500ML ???? Professional Size with Built-In Brush 500ml Economy Size | Brush Applicator | Instant Bond | Flexible Finish ???? Why 500ml Makes Sense The 100ml bottle is fine for small projects or trying contact cement for the first time. But if you're building full cosplay armor sets, working on large-scale props, or running a workshop where contact cement is your go-to adhesive, the 500ml bottle is significantly better value. You're getting 5x the product for less than 5x the price, and you won't run out mid-project.