Bulb Weatherstripping Seal—Bulb seals mount on the edge of one door and compress against the other. They are concealed from view when the doors are closed. Like wraparound seals, they compensate for uneven surfaces and insulate better than flat and brush seals.

Flat Weatherstripping Seal—Flat seals create a solid barrier to block drafts, light, and moisture. Mount along one door’s edge so the seal covers the other door, or mount a strip to each door so the seals overlap.

Brush Weatherstripping Seal—Brush seals are sold in pairs—one strip for each door. They have flexible bristles that interlace when the doors are closed to block light and sound. However, they’re less weathertight than the other seal types. Made with nylon seals, the bristles are durable and long-lasting. They’re also lightweight, so they won’t keep doors from opening or closing.

Vinyl Plastic Seal—Vinyl seals are flexible, durable, and moisture resistant.

EPDM Seal—EPDM seals hold up to water, salt, detergents, UV light, and ozone, however they don’t withstand oil or solvents. They last longer than vinyl and stay flexible at lower temperatures.

Santoprene Seal—Santoprene seals resist water, sunlight, and oxidation, so they’re often used on exterior doors.

Steel Seal—Steel seals are stronger and more rigid than plastic and rubber seals, so they’re used as a barrier that keeps one door from swinging past the other.

Stainless Steel Seal—Stainless steel seals are just as rigid as steel and won’t corrode from chemicals or detergents, so they’re often used in food industry and marine environments.

Anodized Aluminum—Anodized aluminum flanges resist corrosion and won’t tarnish even in harsh weather conditions.