The 5 Best Heavy bodied Seam sealers (2023 reviews)

It is important to have the well suited heavy bodied seam sealer. In the following post, we will help you to select the best heavy bodied seam sealers.

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Our Top Picks:

Best Overall: Buy: 3M low MODULAR Sealer READ REVIEW

Best For Plastic: Buy: custom shop Heavy bodied Seam Sealer READ REVIEW

Best For Fiberglass: Buy: Evercoat Heavy bodied Seam Sealer READ REVIEW

Best For vertical seams: Buy: 3M Heavy bodied Seam Sealer READ REVIEW

Best For Boat: Buy: boating accessories Heavy bodied Seam Sealer READ REVIEW

Best Overall: 3M low MODULAR Sealer

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Not everyone likes to purchase sealer for their daily usage, but the 3m low modular sealer would be an anomoly. M Flexiclear body seam sealer creates strong, airtight seals on exterior and interior joints & seams. This product adheres to the metal & remains slightly flexible after it dries (like an elastomeric caulk) so it won’t crack away from the metal as the vehicle heats & cools in the sun or flexes as it’s driven. It is great for replacing the old dried up sealer.

This is a low modular sealer, a formulation which offers more elasticity for applications where flexibility is required. It takes a while to dry but works good.

• Fully cures in a few days to a flexible tan coating
• Low modular sealer stays flexible once cured
• Wash surface with soap and water to remove water soluble contaminants

Best For Plastic: custom shop Heavy bodied Seam Sealer

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The custom shop heavy bodied seam sealer is the best suitable sealer on the market today. If you want it to look smooth apply with a small brush once you get the seam covered with rubber gloves and put some thinner on your finger rub sealer lightly one way. It provides excellent adhesion, seals cracks, crevices, body seams and is ideal for use on all lap and flange seams and joints. It is easy to apply with a flexible putty knife. It is paintable in 30 to 60 minutes and comes in a light gray color.

The package is completely unharmed and even has padding inside to prevent damage. It is easily applied with a brush and holds a perfect brush mark to match that o.e.m. It is fast drying and designed exclusively for automotive uses.

• Seals up the metal seams very well
• Easy to handle, works well, and paintable
• New and hot release

Best For Fiberglass: Evercoat Heavy bodied Seam Sealer

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The evercoat heavy bodied seam sealer should be able to handle its purpose and duties with ease. The Caulking tube Seam sealer is easier to work with. It can go over painted or unpainted surfaces and can be painted. It comes in a quart can instead of a caulking tube. It can be used on a 70s bronco to fill surprisingly wide gaps in panels underneath, wheel wells, firewall, and floor. It is actually pretty thick additionally it is good as 3m but less cost. The seam sealer is an air dry product. It will stick for a while and possibly slow the rust down, but it won't stop it.

• Works really well and spreads easily
• Excellent product but requires acetone to clean brushes
• Works great and car passed inspection

Best For vertical seams: 3M Heavy bodied Seam Sealer

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If you often find yourself scrambling for convenient and suitable sealer, 3m heavy bodied seam sealer is your end point. The 3M 08531 Heavy Drip-Chek Sealer is a heavy-based sealer specifically designed for filling exterior auto body definition seams including roof drip rails on older vehicles. It works well as a general-purpose automotive seal. It is used to seal cowl vent hats on a 67' mustang and works great. It is ideal for minimal dripping when applied, right from the tube, to vertical seams.

It is designed to shrink slightly as it cures, creating an excellent visual definition seam. It can be applied up to 1/8” wide. It is ideal for vertical seams-and adheres to metal, rubber, glass and painted surfaces. You can paint it the next day.I highly recommend this product.

• A sealant specifically for visual definition seams
• Easily tooled and minimizes dripping on vertical seams
• Controlled shrinkage provides excellent visual definition seams
• Adheres to metal, rubber, glass and painted surfaces

Best For Boat: boating accessories Heavy bodied Seam Sealer

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The boating accessories heavy bodied seam sealer should be able to handle its purpose and duties with ease. The AWLCARE protectant contains no harsh abrasives and will not scratch painted surfaces. It's free rinsing formula leading to faster drying and is 100% biodegradable. It comes in a tip 'n' measure container to get the proper ration of 1 oz. It leaves a non-yellowing protective polymer coating which lasts through multiple washings.

This product is easy to apply and easy to rub off.

• Removes mild stains such as water spots and diesel soot
• Increases resistance to attack from acid rain and other environmental pollutants
• Awlcare protective polymer sealer, 1/2 gal