Buick Gran Sport Weatherstrip & Seals - OEM-Fit Door, Trunk & Window Seals

Stop leaks, drafts, and road noise in your Buick Gran Sport 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 Gran Sport—restoring a tight, quiet seal around your doors, trunk, hatch, and windows.

Our Buick Gran Sport 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 Gran Sport, 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 Gran Sport.

1966 Buick Gran Sport Rear Quarter Window Weatherstrip Seal for Convertibles. Pair.

Designed for convertible body styles, this rear quarter window seal pair from Metro Moulded Parts ensures a snug, weatherproof fit for your classic car. Crafted with concours-quality precision, these seals are easy to install and provide a perfect barrier against water and air leaks, keeping your interior protected and quiet. They are specifically designed to fit 1964-1967 Buick Skylark, Special, and Gran Sport; Chevrolet Chevelle and Malibu; Oldsmobile Cutlass; and Pontiac GTO, LeMans, and Tempest models. The durable material ensures long-lasting performance, while the precise design enhances the overall look and functionality of your vehicle. Backed by Metro's 30-year Platinum Warranty, you can trust these seals to maintain their integrity for decades.

Features and Benefits
  • Protects against water and air leaks.
  • Easy installation for a hassle-free upgrade.
  • Concours-quality design for a factory-fresh look.

$69.99
• SALE $55.95
Select Color/Material Options  
1966 Buick Gran Sport Rear Quarter Window Weatherstrip Seal for Convertibles. Pair.
1965-1967 Buick Gran Sport Roof Rail Weatherstrip Seals, for Hardtop (No Molded Ends).

Designed for hardtop vehicles, these roof rail seals measure 1-1/16" wide and 6' long, providing a perfect fit for your car. Sold as a pair, these seals are crafted by SUPERsoft to deliver unmatched durability and performance. Unlike competitor brands, these seals are made without accelerants or cheap fillers, ensuring they won’t prematurely age or fail. Their design guarantees a tight, leak-free seal, keeping your vehicle protected from water and weather damage. Easy to install, these seals fit snugly along the roof rails, enhancing the overall look and functionality of your hardtop. Backed by a 30-year warranty, SUPERsoft ensures long-lasting confidence in your purchase.

Features and Benefits
  • Provides a leak-free seal to protect against water damage.
  • Made with high-quality materials for long-term durability.
  • Easy to install for a secure fit along the roof rails.

$83.49
• SALE $66.95
Select Color/Material Options  
1965-1967 Buick Gran Sport Roof Rail Weatherstrip Seals, for Hardtop (No Molded Ends).
1966-1967 Buick Gran Sport Top Bow to Header Weatherstrip Seal.

For 1966-1967 Buick Gran Sport, Skylark, Special, Chevrolet Chevelle, Malibu, Oldsmobile 442, Cutlass, and Pontiac GTO, LeMans, and Tempest cars, this top bow to header seal is 55" long and designed to fit perfectly. Crafted with steel cores on the ends and equipped with all necessary clips, it ensures a secure and precise installation. Made with the finest quality materials and expert craftsmanship, this seal is built to protect your car’s interior by preventing water penetration, saving you from costly and time-consuming repairs. Its durable construction and snug fit make it an essential upgrade for maintaining the integrity and appearance of your classic car. Backed by a 30-year warranty from SuperSoft, you can trust in its long-lasting performance and reliability.

Features and Benefits
  • Protects against water damage to preserve your car’s interior.
  • Includes steel cores and clips for a secure and easy installation.
  • High-quality materials ensure durability and a perfect fit.

$104.49
• SALE $83.95
Select Color/Material Options  
1966-1967 Buick Gran Sport Top Bow to Header Weatherstrip Seal.
1965-1967 Buick Gran Sport Roof Rail Weatherstrip Seals, for Hardtop. 1-1/16" Wide X 8' Long.

Designed for hardtop vehicles, these roof rail seals measure 1-1/16" wide and 8' long, providing a perfect fit and reliable protection. Sold as a pair, these seals are crafted by SUPERsoft to deliver better sealing than competitor brands, ensuring your car stays dry and protected from leaks. They are made without accelerants or cheap fillers, which means they won’t age or fail prematurely, offering long-lasting durability. These seals are installed along the roof rails of your hardtop, creating a tight, weatherproof barrier to keep out water, wind, and noise, enhancing your driving experience. Backed by a 30-year warranty, you can trust that these seals are built to last and provide peace of mind for decades.

Features and Benefits
  • Provides a tight seal to prevent leaks and keep your car interior dry.
  • Made with high-quality materials that resist aging and wear.
  • Easy to install along the roof rails for a secure fit.

$114.49
• SALE $91.95
Select Color/Material Options  
1965-1967 Buick Gran Sport Roof Rail Weatherstrip Seals, for Hardtop. 1-1/16" Wide X 8' Long.
1966-1967 Buick Gran Sport Windshield Pillar Post Weatherstrip Seals for Convertibles.

For convertible models, these windshield pillar post seals measure 25 inches long and come as a two-piece pair. Designed to fit 1966-1967 Buick Gran Sport, Skylark, and Special; Chevrolet Chevelle and Malibu; Oldsmobile 442 and Cutlass; and Pontiac GTO, LeMans, and Tempest cars, these seals are crafted to provide a snug, weatherproof fit. They are sunlight and UV-resistant, ensuring long-lasting durability and protection against harsh elements. The seals feature a smooth, flawless surface free of exposed cells, giving them a clean, professional appearance. Installed along the windshield pillars, they help prevent water leaks and wind noise, enhancing the comfort and integrity of your classic car. Backed by a 30-year warranty from SuperSoft, these seals offer peace of mind and reliable performance for decades.

Features and Benefits
  • Protects against water leaks and wind noise.
  • Sunlight and UV-resistant for long-lasting durability.
  • Smooth, flawless surface for a clean look.

$128.99
• SALE $102.95
Select Color/Material Options  
1966-1967 Buick Gran Sport Windshield Pillar Post Weatherstrip Seals for Convertibles.

(40 Total Products)