Sealants are substances used to block the passage of fluids through the joints, surface, or any openings in materials. In building construction, sealant is usually synonymous with caulking as it also functions the same purpose such as blocking sound, dust, and heat transmissions.

Sealants may be strong or weak, rigid or flexible, temporary or permanent. Sealants are not adhesives but some types of sealants might have adhesive attributes and are called structural sealants or adhesive-sealants.

Now when we talk about Mastic Sealants; Mastic is really just a general term used for all things filler / sealant / silicone type material. It's not a specific thing in its own right. To be clear, “mastic” can be used to pertain to a sealant, but not sealant to mastic. 

Sealants are typically used to close small openings that are otherwise difficult to shut with other forms of materials. These surfaces include such as drywall, concrete, and a whole lot more. Desirable properties of sealants include corrosion resistance, insolubility, and adhesion. Utilizations for sealants widely vary and are used in numerous industries; for instance, automotive, construction, and aerospace industries.

Here’s a list of some other surfaces on which Mastic Sealants can be used:

  • Glass
  • Tires
  • Roofs
  • Wood
  • Asphalt
  • Aircraft
  • Casting
  • Gaskets
  • Engines
  • Radiators
  • Reservoirs
  • Aquariums
  • Pipe threads
  • Military grade
  • HVAC systems
  • Marine industry
  • Hydraulic systems
  • Concrete/Cement
  • Aerospace industry

When dealing with important projects on delicate surfaces, proper handling of sealants are a must. That’s when professional mastic sealant contractors come into the picture. They’ll make sure that all cracks, crevices, or any other openings will be seamlessly covered, for they know that it could be the cause of a serious pest infestation or even water infiltration.

It’s also worth mentioning that proper maintenance of your property keeps it in superb condition, thus, maintaining its true value.

A well-advised property owner and/or manager knows the worth of appointing a professional mastic company to do these crucial tasks. Truth is, proper maintenance of your property will save you a lot of money in the long run.


National Sealants many years’ of experience in the mastic sealant application industry has allowed us to create a large portfolio of clients and making us the first choice among many contractors. We pride ourselves on the quality service and total customer satisfaction we provide by only giving a level of workmanship and professionalism our c