The 8 Best Automotive Seam Sealers
This wiki has been updated 15 times since it was first published in March of 2018. Most typically used in the restoration of classic cars and fixing problems in modern ones after crashes, automotive seam sealers come in a small range of varieties. They can be applied to both interior and exterior sheet metal overlaps in order to create a watertight joint, and they can either be sprayed, squeezed or brushed on, depending on your specific application. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki.
March 05, 2021:
While you can find automotive seam sealers from a variety of companies, we recommend sticking with the best and most respected brands in the industry, which is exactly what you have here. It should be noted that there aren't a lot of changes made in the formulas and sealants available from year to year, and as such, no adjustments needed to be made to our recommendations at this time. The sealers you'll find here have been proven to perform, and perform well, which is why we continue to recommend them. If that changes for any reason, we will be quick to reflect this in our lineup.
October 09, 2019:
The Eastwood 51655 is purpose made for sealing body seams and replacement floor pans. It has just the right consistency when cured to form a waterproof seal but keep everything in place. We included the Permatex and the J-B Weld because they can be used for metal seams but since they are RTV silicones, they come in handy for most silicone needs. Keep in mind that these are not oil-resistant. Special oil-resistant silicone is needed for parts that are meant to come in contact with oils.
Auto repair can be dangerous and should only be performed by trained technicians to avoid personal injury or damage to equipment.