body shops use a product called seam sealer. i am sure you could find something on the 3M websight. make sure that you scrape all the old stuff out and prep it good so the new stuff can stick. and if all else fails use vulkum
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1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags
'02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's
(the family car)
1993 Cherokee work ride/weekend wheeler