Expert advice
What is the difference between mastic and silicone?
Understand the terms before choosing a sealant service.
Mastic is often used as a general trade term for sealant work, whereas silicone describes a particular family of flexible sealants.
Different joints may require silicone, hybrid polymer, polyurethane, acrylic or other specified materials. Selection depends on movement, substrate, exposure and the manufacturer’s instructions.
For glazing, façades, fire-rated details or commercial joints, product selection should follow the applicable project specification rather than appearance alone.
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