Material Selction Flashcards

1
Q

Latex

A
  • Interior use only
  • Limited flexibility (movement) - typically <10%
  • Not suitable for joint treatment
  • Paintable with latex products only
  • Limited service life before replacement is required
  • Commonly referred to as a caulk not a sealant
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2
Q

Acrylics

A
  • Interior & exterior use
  • Limited flexibility (movement) - typically <12.5%
  • Slightly more flexible than latex
  • Poor weathering characteristics
  • Can be painted with most common paint products
  • Limited service life before replacement is required
  • Commonly referred to as a caulk not a sealant
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3
Q

Butyls

A
  • Interior & exterior use
  • Good bond to many substrates
  • Limited flexibility (movement) - typically <10%
  • Poor weathering characteristics
  • Can be used as a sealant and an adhesive
  • Can be difficult to apply (sticky and “stringy”)
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4
Q

Polysulfide’s

A
  • Interior & exterior use
  • Good bond to many substrates
  • Limited flexibility (movement) - typically <12.5%
  • Poor recovery to its original state after extension/elongation
  • Good chemical resistance properties
  • Good for submerged applications
  • Commonly require a primer
  • Typically high solvent content (VOCs)
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5
Q

Silicones

A
  • Interior & exterior use
  • Good bond characteristics to many substrates
  • Good UV stability
  • Good flexibility (movement) - typically <350%
  • Very sensitive to application conditions; adhesion is easily adversely affected
  • Difficult for other materials to bond to
  • Poor stain resistance
  • Prone to dirt pick up
  • Poor paintability characteristics with water based paints
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6
Q

Polyurethanes

A
  • Interior & exterior use
  • Wide range of modulus performances available (low to high)
  • Typically high solvent content (VOCs)
  • High isocyanates content (carcinogens)
  • Good flexibility (movement) - typically up to 1,000%
  • Poor adhesion on damp substrates
  • Bubbling common in high humidity conditions or when applied to damp surfaces
  • Reduced performance in low temperature conditions
  • Stiffer and more difficult to apply
  • Reduced bond strength
  • Reduced service life compared to STPs
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7
Q

Silane Terminated Polyethers (STP) (a.k.a. MS Hybrids)

A
  • Interior & exterior use
  • Combine the best of polyurethane and silicone technologies
  • 100% solids, isocyanate FREE (NO VOCs!), Environmentally friendly
  • Good flexibility (movement) - typically up to 1,000%
  • Maintains flexibility both in-service and during application in lower temperatures
  • Easy to install, even in low temperatures
  • Fast tack free and full cure times
  • Exceptional bond
  • Bonds to silicates within the concrete and maximizes bond strength
  • Bonds to damp substrates
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8
Q

Sell CTS Sealants….

A
  • Will NOT bubble in humid conditions or when applied to damp substrates
  • Maximizes service life
  • Paintable in 24 hours with most common paint & coating materials
  • Good dirt pick up resistance
  • High heat resistance
  • Great weather and UV resistance
  • Good stain resistance
  • Very high peel and tensile strengths
  • Good adhesion to a wide variety of substrates (e.g., wood, metals, plastics, ceramics)
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