How To Replace Weatherstrip

The roof rail weatherstrip is secured at the A-pillar before being tucked into the guide. Gilbert suggests this in order to take up any slack toward the middle on top. It's less obvious up there and won't adversely affect sealing if it happens.

Gilbert gently tucks the roof rail weatherstrip into the guide and presses into place.

Mustang doors have always had external weatherstrips and internal felts. For '69-'70, Ford continued this practice only with window felts attached to the door panels (Sports Interior with molded door panels) or window sills (standard interior). Here, the external weatherstrip is popped into place via spring clips. Make sure the window glass is below the weatherstrip line.

A small countersunk sheetmetal screw secures weatherstrip at the door end. Believe it or not, it's a good idea to drill 1/16-inch holes carefully along this weatherstrip and use sheetmetal screws because window glass tends to pull the weatherstripping out. This can especially be a problem for '65-'68 Mustangs.

The inner weatherstrip mentioned earlier is secured with staples. Drill two 3/16-inch holes staple-width apart for each staple or arm yourself with a good pneumatic staple gun and be careful.

Staples are crimped with channel locks or vice grips. Take care not to damage the weatherstrip felt.

Vertical glass weatherstrip is an easy slide out and slide in involving a single sheetmetal screw. In some '69-'70 applications, this vertical weatherstrip is on the quarter window instead of the door glass.