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Glossary

Glossary

Check Out Metro Sealant’s Glossary For A Comprehensive Compilation Of The Definitions Of Building Construction Sealant Terms.

ADHESION

The state in which two surfaces are held together by bonding forces; where two materials stick together.

BOND

The union between materials with the assistance of adhesives. The adherence of an adhesive or sealant to a substrate.

BOND BREAKER

A material such as a bond breaker tape prevents adhesion of a sealant to an interface.

BOND STRENGTH

The amount of force required to rupture a bond. Measured in pounds per square inch.

BUTYL RUBBER

A synthetic rubber that is a copolymer of isobutene and isoprene. Used widely in adhesives and sealants. It has a slow cure but possesses good tensile strength.

CAULK (NOUN)

A sealant with a relatively low movement capability of less than 20%. Used in cases where little or no movement capability is required.

CAULK (VERB)

The act of filling a crack, joint, gap, or device with a sealant.

COHESION

The chemical bond within the sealant itself that holds it together.

CURE

A chemical reaction where the sealant or adhesive becomes a functional solid.

CURE TIME

The duration taken for a complete cure of the sealant to occur in specific conditions (given temperature and humidity.

CURING AGENT

A substance that is applied to a polymer to facilitate a cure.

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ELASTIC

The quality of a material that permits it to be stretched and immediately return to its original shape and length upon release of the stress.

ELASTOMERIC

A rubbery material that is “elastic”. It has the ability to return to its approximate original dimensions almost immediately after receiving an amount of deformation.

EPOXY

A synthetic resin that is tough, durable, and highly resistant to chemicals and moisture. A class of resins that produces great adhesives.

EPOXY RESIN

A thermosetting resin that is a champion in toughness, strength properties, and corrosion resistance. Usually used as coatings, structural adhesives, and floor surfaces, amongst many other uses.

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JOINT

The opening between adjoining surfaces or parts of a structure.

JOINT SEALER

The parts of a joint sealing system used to seal joints and openings. Such parts include sealants and tapes.

JOINT SEALING SYSTEM

A combination of joint sealers such as caulking compounds and fillers to close joints between materials.

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NON-STAINING

The characteristics of a sealant to not cause staining or discoloration of the surface they are adhered to.

NON-VOLATILE

The solid part of a caulk, solvent, or coating that remains after the solvent evaporates.

OXIDATION

The action of oxygen or ozone to form an oxide. Results in the chalking and cracking of caulks and sealants.

POROSITY

A measure of pore volume; the ratio of void space to the total volume of the material. Generally expressed as a percentage or decimal.

PRIMER

A preparatory coating applied to surfaces prior to the sealant in order to improve adhesion.

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RESIN

Solid, organic compounds of plant or synthetic origin. They are not soluble in water and can be transparent or translucent. Examples: Epoxy and acrylic.

SEALANT

The material used to accommodate joint movement, and seal openings against the intrusion of external elements such as water, dust, and insects.

SHELF LIFE

The duration a sealant can be stored and still be usable. Shelf life differs according to product and storage conditions.

SILANE

A silicone-like compound that is added to sealants to help improve adhesion.

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