The purpose of caulk (note: higher performing caulks are called "sealants") is to seal joints or cracks from the intrusion of water, air (hot or cold), dust, pollution, insects and noise. Caulk can also serve the merely aesthetic purpose of dressing up or finishing off an otherwise rough-appearing joint. To properly serve these purposes, the caulk must stay in place - without cracking- for an extended period of time. It can only do so if it maintains good adhesion to both sides of the joint and can easily flex with whatever movement occurs in the joint being sealed.
Understanding the job a sealant does is best understood by comparing its definition to that of an adhesive. Sealents are used to seal joints that move, and adhesives are used to prevent joints from moving. The following describes the basics of how to use caulking to get the most value out of the product, as well as your precious time and effort. By following the guidelines below you will greatly reduce the risk of failure and greatly increase the chances of achieving a sound, durable and attractive seal for many years to come.
Content provided by Sashco Sealants.
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