2K Butyl Architectural Sealant B

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

A

Butyl rubber (Kalene 800, Royal Adhesives)

xx

A

HiSil 243B

xx

A

Stearic acid

x

A

Ti-Pure

xx

A

Zinc oxide

x

A

Lead oxide

xx

A

Toluene

xx

Typical Properties

Properties

Mix ratio (A:B) by weight

xxxxxx

Working life at 25°C, days

xxx

Cure time at 25°C, days

x

Tensile strength, psi

xxx

Elongation, %

xxx

Hardness, Shore A

xx

Processing

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Resulting Properties

A typical butyl rubber sealant compound is shown above. This two-part general purpose sealant has sufficient resistance to cycle deformation to pass the cyclic durability test of Federal Spec. TT-S-0027E.

Butyl sealants are known for excellent adhesion to most substrates. However, they can stain adjacent surfaces and have relatively poor recovery from extension. The polymeric compositions along with the other additives will affect both the application and the ultimate performance properties of the joint.

Tips and Tricks

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2K Butyl Architectural Sealant (B)

Applicable Base Polymer Properties