An astragal is a moulding profile composed of a half-round surface surrounded by two flat planes fillets. An astragal is sometimes referred to as a miniature torus. It can be an architectural element used at the top or base of a column , but is also employed as a framing device on furniture and woodwork. An astragal is commonly used to seal between a pair of doors.
Wraparound seals create a seal on both sides of a door. They are abrasion-resistant neoprene. Brush seals have flexible filaments that conform to fill gaps. The filaments are nylon for good wear resistance. Flat seals press against surfaces to create a seal.