#10 COIL YARDAGE
I stock both coil & molded tooth in #10 or 10mm zipper.
Both are very strong.
The zippers below are COIL. Molded tooth are in the categories on the left under #10 Molded Marine.
Coil is more pliable which means it will travel along a curve better. Coil is nylon on a polyester twill tape.
Molded tooth is RESIN not plastic like other brands. RESIN is more sun & salt resistant than plastic. Plastic gets brittle in a marine environment which causes the teeth to break off.
This size zipper (#10 or 10mm) is overkill for cushions, even boat cushions. Use #5 or 5mm zipper, medium weight, for windowseats, sofa, or boat cushions.
Both types of zippers give enhanced performance when treated with beeswax (candles) or white bar soap. I have also sprayed a little of the dry-grease lube that I use on my bike chain on a paper towel & applied to an abused tent zipper.
What my video below to compare the different types of zippers & how to put the heads on your zippers: