It depends on the type seal and are you talking about the bulb seal or the wiper seal, inner or outer seals. Are the bulb seals and wiper seals in one piece or are they two piece?
On our trailer, the bulb seals are separate and not that hard to replace. I leave the wiper seals to the shop.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Currently FOR SALE Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer