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Comparing Waterproof Sealants for Your Sydney Property: Polyurethane vs Silicone

January 31, 2019

There are multiple reasons to use waterproof sealants in your Sydney home or business. It could be anything from creating a water damage-resistant barrier to improving the overall look of the property. In this blog, we compare the characteristics of two popular sealants – polyurethane and silicone – to help you understand which might work best for you.

When you go out in the rain, what is the first thing you take with you? An umbrella or raincoat, we’d assume. You do this to protect your clothes (and yourself) from the harmful effects of the water and wind. It should be the same with the building materials you use in and around your property.

What is a Waterproof Sealant?

The human body is a great example of how a structure can be designed to adapt to its external surroundings. When the weather changes, your body adapts to accommodate the conditions. Human skin, for example, is waterproof. You can imagine how difficult life would be if this wasn’t the case. Remember the cartoon character who lives in a pineapple under the sea?

Sealants are elastomeric materials, which means that they enable movement in your building materials. With sealants, the building has some wiggle room, to expand and contract without sustaining significant damage – especially when the weather changes. A good sealant keeps water and air out, while protecting your property from both cold and warm conditions. Silicone and polyurethane are popular sealants with a few differences between them.

Polyurethane vs Silicone: What’s the Difference?

  • Cost-effectiveness:

Polyurethane is typically cheaper than silicone, but only at face value. If you consider that silicone lasts longer that polyurethane, you might spend more on multiple polyurethane installations or maintenance costs in the long run. Weigh up your options to choose the sealant that suits your unique needs.

  • Chemical makeup:

Polyurethane and silicone are organic and inorganic materials, respectively. This difference in chemical levels means that each sealant reacts differently to external factors. Silicone is more resistant to UV rays from the sun, because of its inorganic status. Polyurethane will return to its natural state eventually

  • Lifespan:

Silicone lasts twice as long as polyurethane does. On average, that boils down to approximately 20 years versus 10 years, respectively. It’s possible to change from one sealant type to another, but enlist the help of a professional to make sure the job is done right.

Contact the experts at Waterproofing Direct to get top quality waterproof sealants for your Sydney property. We have it all. Call us on 1300 557 973 today!