A guide on selecting the right sealant for your project


Anyone who’s just a little bit familiar with the issues building renovation can bring, knows how important is to keep out moisture and damp at bay. With each building having its own set of specific characteristics, it’s crucial to be aware of the options available. Even though having skills in applying a sealant is important for having the job well done, knowing which one to use for a specific job, demands the understanding of the most important properties of a sealer.

Which properties are the most important?

– tolerance to movement

– thickness

– durability

– resistance to various weather conditions

– harmful content

– relative cost

What you need to pay attention to as well, is the identification of the failed sealant type. It’s necessary to assess what caused the failure because it’ll be much easier for you to find the appropriate sealant. You can consult a professional to help you identify the sealant that failed. And most importantly, make sure to choose the right sealant before reapplying.

What should you pay attention to when choosing a sealant?

First of all, make sure to find the correct replacement sealant to avoid further failures. The sealant you choose should be determined by the failure type. For example:

  1. find a sealer that is capable of accommodating excessive joint movements
  2. identifying any incompatible sealant is crucial for determining the right restoration sealant
  3. pay close attention to how the surface was prepared
  4. in case the failed sealant has reached its life service, it needs to be replaced.

What are some of the most common sealers used?

These are some of the most commonly used sealants available on the market.

Latex – these water-based sealants are easy to handle, easy to clean up, can be painted and are cheaper than other sealant types.

Butyl – these solvent-based sealants have outstanding weathering characteristics, but are very difficult to apply. Their movement accommodation is limited.

Polysulfide – even though water and chemical resistant, these sealants fail to tolerate excessive movement, so they’re used in locations where tolerance to submersion is a must. They are relatively expensive.

Silicone – silicon-based sealants are used for various purposes. With strong features, such as temperature-resistance, long service life, and flexibility, these sealers have many different applications. A downside of silicone-based sealants is the strong odor and a long time to cure.

Polyurethane – these sealants are considered the strongest. Polyurethane sealants have the best performances compared to other sealants, starting from adhesion, abrasion-resistance, to excellent movement capability. One of the best polyurethane sealants on the market is sikaflex 11fc know for its excellent performances for both outdoor and indoor applications.

So which one should you use?

As we already said, it depends, just like with other building materials. You can always contact professionals at Building Construction Supplies for an advice if you’re not sure what might be the right solution for you. With the wide range of sikaflex sealants, you’ll be sure you made the right choice, both for yourself and for the environment. Always make sure to set the standards high before starting a project.