Buick GS 400 Weatherstrip & Seals - OEM-Fit Door, Trunk & Window Seals

Stop leaks, drafts, and road noise in your Buick GS 400 with precision-fit replacement weatherstrip and seals designed specifically for your vehicle. Each seal is engineered to match the original profile and mounting groove of your Buick GS 400—restoring a tight, quiet seal around your doors, trunk, hatch, and windows.

Our Buick GS 400 weatherstrip is manufactured from durable, weather-resistant rubber compounds such as EPDM, engineered for an exact OEM-quality fit and finish. These materials resist sunlight, ozone, and chemical exposure while maintaining flexibility across temperature extremes, so your new seals stay soft and pliable instead of cracking or hardening the way factory-original rubber does over time.

Use the Vehicle Selector above to find the correct weatherstrip for your Buick GS 400, or browse below to explore available options. Whether you’re chasing down a stubborn water leak or completing a full restoration, Factory Interiors makes it easy to achieve a tight, factory-quality seal with precision-fit weatherstrip for your Buick GS 400.

1969 Buick GS 400 Molded Roof Rail Weatherstrip Seals for 2-Door Hardtop Only. Pair R&L.

Designed specifically for 2-door hardtop models, these molded roof rail seals are crafted to fit perfectly and provide exceptional weatherproofing. Engineered for 1969-1972 Buick GS, Skylark, Chevrolet Chevelle, Monte Carlo, Oldsmobile 442, Cutlass, Pontiac GTO, LeMans, and Tempest cars, these seals ensure a snug fit that keeps water and wind out, protecting your interior from leaks and drafts. Made by SUPERsoft, these seals are guaranteed to never leak and are free from accelerants or cheap fillers, ensuring long-lasting durability without premature aging or cracking. The pair includes both left and right seals, molded to match the original design for easy installation along the roof rails. Backed by a 30-year warranty, these seals offer peace of mind and unmatched quality, making them a reliable choice for restoring your classic car.

Features and Benefits
  • Provides a tight seal to prevent water and wind intrusion.
  • Made with high-quality materials for long-lasting durability.
  • Easy to install with a precise molded fit for 2-door hardtops.

$153.49
• SALE $122.95
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1969 Buick GS 400 Molded Roof Rail Weatherstrip Seals for 2-Door Hardtop Only. Pair R&L.
1968-1969 Buick GS 400 Weatherstrip Seal Kit, for 2-Door Sedan.

Designed for 2-door sedans, this Basic Kit includes high-quality door and trunk seals (LM 12-S, TK 46-16) to ensure a snug, weatherproof fit for your classic car. Tailored for 1968-1972 Buick GS, Skylark, Chevrolet Chevelle, Oldsmobile Cutlass, Pontiac GTO, LeMans, and Tempest models, this kit is crafted to keep your vehicle protected from the elements while maintaining its vintage charm. The seals are made from durable, flexible materials that provide a tight seal, reducing noise and preventing water leaks. Easy to install, these seals fit seamlessly into the door and trunk areas, restoring your car’s original functionality and appearance. Backed by a 30-year warranty from SuperSoft, you can trust in the long-lasting quality and performance of this kit.

Features and Benefits
  • Keeps your car interior dry and quiet by sealing out water and noise.
  • Made from durable materials for long-lasting performance.
  • Easy installation ensures a hassle-free restoration process.

$162.49
• SALE $129.95
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1968-1969 Buick GS 400 Weatherstrip Seal Kit, for 2-Door Sedan.
1968 Buick GS 400 Door Weatherstrip Seal, with Clips and Molded Ends.

For 2-door hardtops and convertibles, this door seal pair with clips and molded ends is designed to replace OEM #7717754/5, ensuring a precise fit and excellent sealing performance. Crafted by SUPERsoft, these seals are 30% softer and more durable than other brands, providing a snug, long-lasting barrier against wind, water, and noise. Unlike other seals, these are made without accelerants or cheap fillers, which means they resist aging and cracking over time. Perfectly tailored for 1968 Buick GS 350, GS 400, Skylark, 1968 Chevrolet Chevelle, 1968 Oldsmobile 442, Cutlass, and 1968 Pontiac GTO, LeMans, and Tempest models, these seals will restore your car's original comfort and style. Backed by a 30-year warranty from SUPERsoft, you can trust in their quality and durability for decades to come.

Features and Benefits
  • Provides a tight seal to block wind, water, and noise.
  • Made from premium materials for long-lasting performance.
  • Easy installation with molded ends and clips for a secure fit.

$188.49
• SALE $150.95
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1968 Buick GS 400 Door Weatherstrip Seal, with Clips and Molded Ends.
1969 Buick GS 400 Door Weatherstrip Seal. With Properly-Spaced Clips and Molded Ends.

For 2-door hardtops and convertibles, this door seal pair (left and right) is designed to replace OEM# 8781164/5, ensuring a precise fit and excellent sealing performance. Crafted with properly spaced clips and molded ends, these seals provide a snug, weatherproof barrier to keep out water, wind, and noise, enhancing your driving experience. Metro's seals are 30% softer and more durable than other brands, offering a superior fit and long-lasting performance. Unlike other products, Metro parts are free from accelerants and cheap fillers, preventing premature aging and failure. This pair is compatible with a range of classic cars, including the 1969-1972 Buick GS, Skylark, Chevrolet Chevelle, Monte Carlo, Oldsmobile 442, Cutlass, and Pontiac Grand Prix models. Backed by Metro's 30-year warranty, you can trust these seals to protect your vehicle for decades.

Features and Benefits
  • Keeps water, wind, and noise out for a quieter ride.
  • Made with softer, more durable materials for a better fit.
  • Molded ends and clips ensure easy installation and a secure fit.

$246.99
• SALE $197.95
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1969 Buick GS 400 Door Weatherstrip Seal. With Properly-Spaced Clips and Molded Ends.
1968 Buick GS 400 Vent Window Weatherstrip Seals. 2-Door Hardtop and Convertible.

For 2-door hardtop and convertible models, these vent window seals are designed to replace OEM# 9712506/7 and come as a pair for both the right and left sides. Crafted with precision using the latest advancements in CAD and CNC milling, these seals ensure a perfect 3D contour fit and maintain an OEM-quality appearance. They are tailored to fit 1968 Buick GS 350, GS 400, Skylark, and Special, as well as 1968 Chevrolet Chevelle, Oldsmobile 442, Cutlass, F85, and Pontiac GTO, LeMans, and Tempest models. These seals are built to keep out wind, water, and noise, ensuring a quieter and more comfortable ride while enhancing the overall look of your classic car. Backed by Metro's 30-year warranty, you can trust in their durability and long-lasting performance.

Features and Benefits
  • Provides a snug, weatherproof seal for vent windows.
  • Enhances the appearance and functionality of your classic car.
  • Designed for easy installation with precise 3D contouring.

$294.49
• SALE $235.95
Select Color/Material Options  
1968 Buick GS 400 Vent Window Weatherstrip Seals. 2-Door Hardtop and Convertible.

(45 Total Products)