People spec the right vinyl for an aircraft seat and then drop standard upholstery foam underneath it. That’s a problem — because the foam matters as much as the cover when it comes to cabin fire safety. Here’s what you need to know.
Aircraft seat foam has to be fire-rated
Cabin materials are governed by flammability requirements, and that includes the cushion, not just the cover. Aircraft seat foam needs to be fire-rated (FR) for its application — ordinary furniture or marine “sew foam” generally is not.
Why your standard sew foam probably isn’t FR
Here’s the catch a lot of shops miss: in recent years, Prop 65 pressure pushed many foam manufacturers to strip the fire-retardant additives out of standard sew foams. So the foam on your shelf that you’d use for a boat seat is very likely not fire-rated — even if older stock once was. Don’t assume; verify the rating for your application.
How to handle it
Pair your FAR 25.853A-listed vinyl with foam that’s rated for aircraft use, sourced for your specific application. We’ll be straight with you: we don’t stock FR sew foam, so our aviation orders are certified vinyl and thread — you source aircraft-rated foam separately. We’d rather tell you that than sell you the wrong cushion under a compliant cover.
The certified vinyl and the cert are the parts we handle: see Spirit Millennium and our aviation vinyl guide.
Carolyn Fabrics supplies upholstery materials and the manufacturer’s flammability (burn) certification documentation. We do not determine airworthiness. Final compliance, installation, and airworthiness determinations for your aircraft are the responsibility of the installer/owner and certifying mechanic under applicable FAA regulations.