The main difference between caulk and a sealant is elasticity. Caulks are more rigid when dry when compared to Sealants, and are intended for use in areas with minimal expansion and contraction. They are more highly filled which is one of the reasons they are lower in flexibility. Caulk resting can be formulated from vinyl, acrylic, siliconized acrylic, silicones and other resin including hybrids. Each type allows for specific specs to be obtained.

Sealants are made from flexible materials, making them ideal for areas prone to expansion and contraction. They are also waterproof, which is not the case with all caulks. This allows for greater use in high moisture areas such as bathrooms and kitchen sinks as compared to caulks.

One component moisture cure systems and two-component systems are also useful where long term durability is required. Our scientists have considerable experience working with both caulks and sealants, through testing, analytical and new product formulation.

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