Door Sill Plates Installation
  • Vote Up0Vote Down joe53HHjoe53HH
    Posts: 31Expert Adviser
    When installing the 3 sill/scuff plates in the stepdown door threshold should I use any type of sealant or gaskets between them? Thanks!
  • 9 Comments sorted by
  • Vote Up0Vote Down RonSRonS
    Posts: 726Senior Contributor
    When I placed mine (coupe), I placed a piece of rubber foam at both ends. The rubber should be a tight foam black piece that squishs down a bit to stop water from entering the footwell.
  • Vote Up0Vote Down Tallent RTallent R
    Posts: 1,739Senior Contributor
    They were originaly sealed at the ends with that body gum simmilar to modeling clay .If you can find it ,of course anything that will keep the water out is the main thing as mentioned abouve,
    Retired Tech.
  • Vote Up0Vote Down StillOutThereStillOutThere
    Posts: 654Expert Adviser
    Walk into most parts stores or any body shop supply and ask for "strip caulk". Buy the 3M brand if they carry it. It comes in gray or black and in this step plate application, gray was used as I recall.
  • Vote Up0Vote Down Tallent RTallent R
    Posts: 1,739Senior Contributor
    Yes , same stuff . never seems to set up completely , stays in place to seal odd shaped gaps,
    Retired Tech.
  • Vote Up0Vote Down hudsn47hudsn47
    Posts: 131Senior Contributor
    Reminds me of plumbers putty, not that I would ever use it on my car. :-$
  • Vote Up0Vote Down syddthekiddsyddthekidd
    Posts: 127Expert Adviser
    My dad was a mechanic at a Hudson dealer and then later at a Triumph dealer. Triumphs always leaked a lot of water and you had to seal the tail lights with the stuff. The mechanics always called it dum dum....
  • Vote Up0Vote Down J SpencerJ Spencer
    Posts: 463Expert Adviser
    Strip caulk is a very good product, used a good bit of it repairing my customers cars especially around the heater box when replacing heater cores. Have also used it in a couple of spots on my Pacemaker. My car had some formed rubber seals at the ends of the door sills. I ended up buying a garage door bottom weather seal ( at Home depot), cutting it to the length of the old one and gluing it in place with contact cement as was the old one. The new seal has a slight bend/crease in it that fit near perfect. Guess I should have taken photos as I did it.

    Jim Spencer
    WNY/Ontario Chapter
  • Vote Up0Vote Down coverton
    Posts: 151Expert Adviser
    I seam sealer-flowable when I can get it.Lord Chemical makes a good one called "fusor" the rep comes by the school each year and does a demo and it does work.I used it to bond a replacement rocker panel on one side of a brand X and welded the other side -15 min vs two days and no warping -amazing products
  • Vote Up0Vote Down Tallent RTallent R
    Posts: 1,739Senior Contributor
    That would be good for sealing gaps and seams but I dont think he should put it under his Threashold plates. They need to come up on occaision ,
    Retired Tech.

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