1. A substance used to seal gaps, cracks, or joints to prevent leakage of air, water, or other materials
Apply a waterproof sealant around the bathtub to prevent water damage.
Aplique um selante à prova d'água ao redor da banheira para evitar danos causados pela água.
2. A coating or compound that closes pores or creates a protective barrier on a surface
The concrete floor needs a sealant to protect it from stains.
O piso de concreto precisa de um selante para protegê-lo de manchas.