Sealant

Definition

A sealant is an elastomeric material used to fill and seal cracks and joints, preventing the passage of moisture and allowing horizontal and lateral movement at expansion joints.

Purpose

The purpose of a sealant is to create a flexible, waterproof barrier in joints and cracks, accommodating movement and preventing water infiltration that could lead to damage.

Examples of Use

• Construction joints in concrete structures are sealed with sealants to prevent water ingress and accommodate movement.
• Windows and doors are sealed with elastomeric sealants to prevent drafts and water leaks.
• Expansion joints in building facades and pavements use sealants to maintain waterproofing and flexibility.

Related Terms

• Caulk: A material used to seal joints or seams against leakage in various structures.
• Gasket: A mechanical seal that fills the space between two or more mating surfaces.
• Waterproofing: The process of making a structure or material impervious to water.

Notes

Selecting the appropriate sealant type is crucial for ensuring durability and performance, as different sealants are designed for various applications and conditions.