Intro To Sealants 1&2

Question 1

Polysulfides

Answer 1

A Synthetic rubber or other polymer in which the units are linked through sulfur compounds

Question 2

Polyurethanes

Answer 2

• A Synthetic resin in which the polymer units are linked by urethane groups,
• used chiefly as a constituent of paints,varnishes, adhesives, sealants and foams.

Question 3

• Silicones

Answer 3

• A class of Synthetic materials that are polymers with a chemical structure
  - Resistant to chemical attack
  - Insensitive to temperature changes
  - Used to make
  - rubber
  - plastics
  - polishes
  - lubricants
  - sealants.

Question 4

• Sealants

Answer 4

• A material used for sealing something as to make it airtight or watertight.
  
  • high performance compound
  • more expensive ingredients
  • little to no shrinkage
  • excellent weathering
  • UV resistance long 10-15 years.

Question 5

• Caulks

Answer 5

• Any low or intermediate performance compound.
  
  • higher levels of shrinkage
  • lower ability
  • resist weathering
  • UV lighting:
    
    • Examples:
      
      • Acrylic
      • Latex
      • Butyl
      • Butyl
      • Rubber
      • Putty
      • life of 3-4 YEARS.

Question 6

Adhesives

Answer 6

• A substance used for sticking objects or materials together. Adhesive may be used like a..
  - glue
  - cement
  - mucilage
  - paste
  
  • is any substance applied to one surface, or both surfaces, that binds them together and resists their separation.

Question 7

Purposes of joint Sealants

Answer 7

• Seal penetrations/joints (some moving joints and some non-moving)
  
  • Prevent water damage
  • Prevent reinforced concrete corrosion (rebar)
  • Prevent structural steel damage
  • Help prevent mold development
  • Prevent hard materials, snow, water, ice, or air from entering joint openings
  • Accommodate Movement
  • Function as Part of an Air Barrier System
  • Function as part of a Vapor Retarding System
  • Acoustical Control

Question 8

• Typical Uses of joint Sealants

Answer 8

• Sidewalks
  
  • Window perimeters
  • Roofing terminations (drip edge and end of Roof)
  • Expansion joints
  • Butt terminations? (Electrical)
  • Control joints
  • Crack filling
  • Tilt wall joint filling
  • Penetrations sealing
  • Door frame sealing
  • Glazing (installing windows)

Question 9

• Typical Applications of Sealants

Answer 9

• High Rise and low-Rise commercial building
  
  • Tilt Wall Construction
  • Parking lots
  • Park Decks
  • Institutions (schools, government buildings, hospitals, prisons, airports)
  • Public Works
  • Bridge and Highway Joints
  • Waste Water Treatment
  • Adhesive and Bonding Applications

Question 10

• Typical Substrates for Sealants

Answer 10

• Concrete
  
  • Masonry & Brick
  • Wood, Plywood,
  • Cement based Siding
  • Stone, Manufactured Stone, Cultured Stone
  • Stucco
  • Vinyl and Aluminum Siding
  • Foam Plastic Panels (EPS)
  • Ceramic Tile
  • Metal Panels (Coated and Uncoated)
  • Kynar metal (metal roofing Mfg)
  • Engineered Plastics (PVC)
  • Glass
  • Stainless Steel
  • EPDM Roofing Membranes (rubber roofing membrane)
  • Modified Bitumen Roofing Membranes
    
    • Another type of runner membrane
  • Fiberglass (FRP)

Question 11

Target Contractors for Sealants

Answer 11

• Pro Caulkers
  
  • Glass Houses
  • Roofers
  • Masons
  • General Contractors
  • Window Installers
  • Tile Contractors
  • Resin Flooring Contractors
  • Electricians
  • Plumbers
  • Concrete Installers

Question 12

What does VOC stand for ?
What are they?
What’s the VOC rating in the Rapidset Sealants?

Answer 12

• volatile organic compounds (salts, corrosive material) not solid
  
  • No VOCs in Rapidset tubes
  • 100% solid molecules

Question 13

What is Cohesive failure?

Explain….

Answer 13

• Tearing down the middle of joint
  - Bonds to substrate
  - But there is underlying problem with backer rod, wrong material, exterior factors.

Question 14

What are the two key factors to Sealant success?

Answer 14

• material selection

- Joint design

Question 15

What is the width to depth ration for Sealants?

Answer 15

2 to 1

- Depth needs to be half the width

Question 16

Stress relaxation

Answer 16

• The ability of the sealant to withstand extension and movement without affecting bond to the substrate at the bond line.
  
  • Stresses that exceed the product’s threshold for elongation or movement capacity will become deformed and cracked, and eventually de-bond.

Question 17

Define Modules

List the types and describe them…

Answer 17

• refers to a material’s ability to stretch or elongate during its service life.
  
  • 3 types
    
    • Low Modulus – Usually has a higher movement capability (softer and more flexible; higher elongation). Elongation typically ranges from 450%- 850%.
    • Medium Modulus - Has a moderate amount of movement capacity. Elongation typically ranges in 200-350%.
      
      • CTS New Products are medium modules
    • High Modulus – Has very little movement capacity. Used only for non-moving joints and cracks. Elongation typically ranges from 10%-60%.

Question 18

Viscosity

Describe temperatures role

Answer 18

• measure of a fluid’s “thickness” and influences its flow and penetration characteristics during application. For example, honey has a much higher viscosity (or thickness) than water.
  - The viscosity of sealants is affected by temperature.
  - Viscosity increases as temperature increases, so the higher the temperature, the more fluid the materials.
  - Viscosity decreases as temperature decreases, so the lower the temperature, the “thicker” or more “paste like” the material becomes.