10 Best Automotive Seam Sealers 2021

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

3M Urethane Seam Sealer – ⭐ Best Overall Automotive Seam Sealer

08367 by 3M

  • Color: Black
  • Weight: 0.42 pounds
  • Dimensions: 9 x 2 x 2 inches
3M Urethane Seam Sealer
  • High quality, single component formula adheres well to bare metal, primed metal and painted surfaces
  • Moisture curing property provides excellent performance in high heat and humidity environments
  • Non-Shrinking, non-cracking, low/no odor formula remains flexible and offers superior results to solvent-based sealers
  • Thick consistency is able to fill large voids
  • Can be smoothed to a featheredge or brushed
  • Paintable after 30-45 minutes

ACDelco 10-2013 Body Joint and Seam Filler Compound – 💲 Best Budget Automotive Seam Sealer

10-2013 by ACDelco

  • Weight: 0.63 pounds
  • Dimensions: 5.8 x 8.5 x 1 inches
  • Warranty: No Warranty
ACDelco 10-2013 Body Joint and Seam Filler Compound
  • For professional use only – not for retail sale
  • Fast curing and skins over quickly—can be painted 60 minutes after application
  • Can be used for all sealing and adhesive applications with a standard caulking gun in both vertical and horizontal joints
  • Flexible, non-staining, and non-sagging product that will not crack or shrink

3M Dynatron Auto Seam Sealer Caulk

550 by 3M

  • Color: Grey
  • Weight: 0.5 pounds
  • Dimensions: 5 x 5 x 10 inches
  • Warranty: As labelled
3M Dynatron Auto Seam Sealer Caulk
  • Fast-skinning
  • Permanently elastic
  • Non sagging

Barrier Bond Brushable Seam Sealer – 👑 Premium Pick

SS101-QT by Custom Shop

  • Color: Gray
  • Dimensions: 4.3 x 4.3 x 5.3 inches
Barrier Bond Brushable Seam Sealer
  • Brushable Seam Sealer is fast drying and designed exclusively for automotive uses.
  • This product remains flexible and will not crack, harden, sink or sag
  • This product remains flexible and will not crack, harden, sink or sag
  • It provides excellent adhesion, seals cracks, crevices, body seams and is ideal for use on all lap and flange seams and joints
  • Brushable Seam Sealer is paintable in 30 to 60 minutes and comes in a light gray color

SEM 29392 Black Seam Sealer

29392 by SEM

  • Release date: 08/30/2014
  • Color: Black
  • Dimensions: 6 x 8 x 9 inches
SEM 29392 Black Seam Sealer
  • Intense color collection that provide high visual impact
  • Not compatible with synthetic enamels
  • They should be applied over bright white for maximum brightness
  • Remains flexible without shrinking or cracking

3M Flexiclear Body Seam Sealer

08405 by 3M

  • Weight: 0.7 pounds
  • Dimensions: 11 x 2 x 2 inches
  • Warranty: Manufacturer Warranty
3M Flexiclear Body Seam Sealer
  • Clear, non-yellowing formula is low profile
  • Low modular sealer stays flexible once cured
  • Fast-drying formula may be painted in as few as 45 minutes
  • Caulk style dispensing system offers convenient application

3M Heavy-Bodied Seam Sealer

08308 by 3M

  • Weight: 0.5 pounds
  • Dimensions: 3.8 x 2.2 x 7.7 inches
3M Heavy-Bodied Seam Sealer
  • A high performance two component epoxy seam sealer. Black in color.
  • Heavy-bodied, non-sagging, non-flowing, and easy tooling formulation for matching OEM seam sealer appearances. Appropriate for bare metal applications.

Barrier Bond Black Seam Sealer Compound

SS103-TB by Custom Shop

  • Color: Black
  • Dimensions: 2 x 2 x 11.5 inches
Barrier Bond Black Seam Sealer Compound
  • Seam Sealer Compound is fast curing and designed exclusively for automotive uses
  • This product is a one part, high performance sealant that combines high flexibility with high ultimate strength, permanent bonds and long service life.
  • These products are high quality elastomeric sealants formulated to provide excellent adhesion to a wide variety of substrates and come in an easy to use, non-sag consistency suitable for easy application with a standard caulking gun in both horizontal and vertical automotive joints.
  • Smooth creamy non-sag texture – easy to tool
  • High rubber content, highly elastic, good low temperature flexibility

3M Dynatron Auto Seam Sealer Caulk

570 by 3M

  • Color: White
  • Weight: 0.5 pounds
  • Dimensions: 2 x 2 x 11.6 inches
  • Warranty: As labelled
3M Dynatron Auto Seam Sealer Caulk
  • Brushable and paintable consistency makes applications easy
  • High adhesion works on both bare metal and painted surfaces
  • Fast skinning starts in about 10 to 15 minutes
  • Non-sagging formula keeps seam sealer in place
  • Non-staining

Akfix Urethane Auto Body Seam Sealer 10.5 fl oz

puss01gry by Akfix

Akfix Urethane Auto Body Seam Sealer 10.5 fl oz
  • Designed to adhere to bare metal, primed metal, metal containers and more.
  • Non-sagging single component formula to fill large voids
  • Does not shrink or crack stays permanently flexible.
  • Seals against water, air, gas and dust.
  • Paintable. No-stick formula does not pick up dirt.

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