Dow Corning® High-Performance Silicone Building Products Are Now Branded DOWSIL™

Dow Corning construction materials are now DOWSIL™. New brand name. Same trusted products.What does Dow Corning Now Branded DOWSIL mean for customers? A new brand name, but the same trusted materials. Continuing warranty coverage. Stronger service and support. A new, easier-to-use website. And a new world of possibilities.

Over the next year, Dow Corning branded silicone building and construction products will move to the DOWSIL name. Product numbers (e.g., “983”) and descriptors (e.g., “Structural Glazing Sealant”) that are part of the product names today will remain the same, and most material numbers and SKUs will not change. Products will be sold through Dow moving forward.

An Integration Information Center is available at Who We Are, where customers can find regular updates, integration activity materials, FAQs, and a tool to generate a chemical equivalency certificates for specific products. More information about Dow’s proven high-performance silicone building solutions can be found at https://www.atlassupply.com/manufacturers/dowsil-dow-corning/.

Download a printable copy of the DOWSIL rebranding announcement [PDF].

Last Modified: July 18, 2018

How To Apply MasterSeal® NP 2 Sealant

BASF MasterSeal® NP 2 Sealant packaged in a 3.5 gallon pail
BASF MasterSeal NP 2 Multi-Component Polyurethane Sealant in a 3.5 gallon pail

Watch how to apply MasterSeal NP 2, a multi-component, highly flexible, high performance, non-priming, polyurethane sealant (Video Transcript). Then learn more about the materials, tools and accessories required to do the job safely and efficiently.

MasterSeal NP 2 Sealant Application Video Transcript

  • Ensure substrate is structurally sound, fully cured, dry and clean
  • Use [MasterSeal P 176] primer as necessary
  • If required, install the appropriate size backer rod for the joint
  • Open the pail and remove the NP 2 activator and plastic sheet
  • Open and pour the NP 2 activator into the pail
  • Thoroughly mix for 4-6 minutes with a slow speed drill and sealant mixing paddle
  • Add MasterSeal 900 pigment into the pail
  • Continue mixing until the pigment is evenly dispersed
  • Draw sealant into caulking gun
  • Attach cone to the caulking gun
  • Cut the cone slightly smaller than the width of the joint
  • Fill joint from the deepest point, to the surface
  • Dry tool joints to create a smooth, concave shape
  • Refer to the MasterSeal NP 2 technical data guide for more information.

Sealant Application Materials, Tools and Accessories

Materials, Tools and Accessories – Shown

  • Protective Gloves – 4-mil nitrile, disposable glove
  • Protective Clothing – Long-sleeve sweatshirt
  • MasterSeal P 176 Primer – High-solids, low-VOC, solvent-based primer for priming joints and substrates
  • Brush
  • Backer Rod – Closed-cell, polyethylene foam, joint filler
  • Wooden Rod, Tapered – Used to press the backer rod completely into the joint
  • MasterSeal NP 2 Sealant, 1.5 Gallon Kit – Preferred for larger sealant applications
  • Steel Pail Opener
  • MasterSeal NP2/SL2 Activator
  • Low Speed Drill
  • Sealant Mixing Paddle
  • MasterSeal 900 Color Pack
  • Spatula – Scrape sides of color pack pigment container
  • Bulk Caulking Gun – Manual
  • Bulk Caulking Gun Cone
  • Caulk Spatula – Give a smooth, concave shape to the sealed joint.

Precautionary Accessories – Not Shown

Refer to the MasterSeal NP 2 Safety Data Sheet (SDS) for more information.

  • Eye Protection
  • Face Protection
  • Respiratory Protection – In case of inadequate ventilation
  • Tool Belt.

Citations

Last Modified: June 14, 2019

ASTM E331 and ASTM E1105: Testing Water Resistance of Exterior Walls

Raindrops test the water resistance of an exterior window, skyscrapers in the background
Raindrops Test The Water Resistance Of An Exterior Window Overlooking Skyscrapers

Water resistance is a critical performance factor for a building envelope, especially in climates where wet, wind-driven rain is a common condition. Keeping water out of wall assemblies is crucial for the long-term health of buildings and their occupants. As with other aspects of building envelope performance, there is a test for that. It is called ASTM E331.

ASTM E331 – Testing Water Resistance In The Laboratory

The full title of ASTM E331 explains its purpose: Standard test method for water penetration of exterior windows, skylights, doors, and curtain walls by uniform static air pressure difference. The test is applicable for testing water resistance of an entire curtain wall or a window, skylight or door alone.

Intended to simulate a realistic scenario, the test requires the construction of a specimen wall with all components to be tested at full size using the same details as in an actual wall assembly. This could include an air barrier or water-resistive barrier as part of the assembly.

The specimen is installed on one side of a sealed test chamber, which is equipped with a water spray grid with nozzles that spray water on the specimen uniformly at a minimum rate of 3.4 L/m2-min. The chamber also has a blower or compressed air system that provides a constant air flow at a fixed pressure. The idea is to create a pressure differential of 137 pascals (Pa), unless otherwise specified. For a skylight, the specimen should be angled as it would be in an actual building installation.

The specimen is then subjected to the water spray and air pressure for a period of 15 minutes. Test technicians observe the test specimen and record any and all points of water penetration on the inside face of the specimen.

ASTM E1105 – Testing Water Resistance In The Field

What about testing water resistance of a wall in the field? Obviously, the method defined in ASTM E331 would be difficult to replicate on site. That’s where ASTM E1105 comes in. It defines a standard test method for determining water penetration of installed curtain walls, windows, doors, and skylights in the field. The wall or fenestration is fitted with an apparatus that creates either uniform pressure or cyclic pressure on the inside surface. A calibrated spray rack with nozzles on the exterior surface sprays water at the installed wall assembly or fenestration at a rate of 3.4 L/m2-min. In this way, ASTM E1105 attempts to simulate the real-world conditions of wind-driven water, similar to the lab water penetration test method described in ASTM E331—with the added advantage of optionally using cyclic pressure, which may replicate conditions more realistically.

Contact A Local Air Barrier Specialist Today

Both ASTM E331 and ASTM E1105 can provide invaluable information on the water resistive performance of curtain walls and fenestrations – either beforehand in the lab or on the project site as construction is underway. Call your local air barrier specialists today at Atlas Supply. Our specialists will help you to select the optimal air barrier for your application and answer any installation questions you might have. Call now!

Citations

Last Modified: May 28, 2019

How To Apply MasterSeal® NP 100™ Sealant

BASF MasterSeal® NP 100™ High Performance Hybrid Sealant packaged in a 300 ml cartridge
BASF MasterSeal NP 100 High Performance Hybrid Sealant in a 300 ml cartridge package

Watch how to apply MasterSeal NP 100, a high performance, low modulus, high movement, non-sag, fast curing, and ready-to-use hybrid sealant (Video Transcript). Then learn more about the materials, tools and accessories required to do the job safely and efficiently.

MasterSeal NP 100 Sealant Application Video Transcript

  • Ensure substrate is structurally sound, fully cured, dry and clean
  • Use [MasterSeal P 173] primer as necessary
  • If required, install the appropriate size backer rod for the joint
  • When using 300 ml cartridges, cut tip of cartridge for desired width of the sealant bead
  • Puncture foil using a sharp object
  • Insert cartridge into caulking gun
  • When using 20-ounce propaks, insert propak into a bulk caulking gun
  • Open propak with a razor knife, then attach cone to the caulking gun
  • Cut the cone slightly smaller than the width of the joint
  • Fill joint from the deepest point, to the surface
  • Dry tool joints to create a smooth, concave shape
  • Refer to the MasterSeal NP 100 technical data guide for more information.

Sealant Application Materials, Tools and Accessories

Materials, Tools and Accessories – Shown

  • Protective Gloves – 4-mil nitrile, disposable glove
  • Protective Clothing – Long-sleeve sweatshirt
  • MasterSeal P 173 Primer – Quick drying, solvent-based primer for priming joints and substrates
  • Brush
  • Backer Rod – Closed-cell, polyethylene foam, joint filler
  • Wooden Rod, Tapered – Used to press the backer rod completely into the joint
  • MasterSeal NP 100 Sealant, 300 ml Cartridge Package – Preferred for smaller sealant applications
  • Razor Knife
  • Caulking Gun – Manual
  • MasterSeal NP 100 Sealant, 20-Ounce ProPak Package – Economical and efficient for larger sealant applications
  • Bulk Caulking Gun – Manual
  • Bulk Caulking Gun Cone
  • Caulk Spatula – Give a smooth, concave shape to the sealed joint.

Precautionary Accessories – Not Shown

Refer to the MasterSeal NP 100 Safety Data Sheet (SDS) for more information.

  • Eye Protection
  • Face Protection
  • Respiratory Protection – In case of inadequate ventilation
  • Tool Belt.

Citations

Last Modified: May 27, 2019

How To Apply MasterSeal® NP 1™ Sealant

BASF MasterSeal®  NP 1 Sealant packaged in a 300 ml cartridge, inserted into a manual caulking gun
BASF MasterSeal NP 1 Polyurethane Sealant in a 300 ml cartridge package, inserted into a caulking gun

Watch how to apply MasterSeal NP 1, a one-component, high performance, non-priming, gun-grade, elastomeric polyurethane sealant (Video Transcript). Then learn more about the materials, tools and accessories required to do the job safely and efficiently.

How To Apply MasterSeal® NP 1 Sealant

MasterSeal NP 1 Sealant Application Video Transcript

  • Ensure substrate is structurally sound, fully cured, dry and clean
  • Use [MasterSeal P 176] primer as necessary
  • If required, install the appropriate size backer rod for the joint
  • When using 300 ml cartridges, cut tip of cartridge for desired width of the sealant bead
  • Puncture foil using a sharp object
  • Insert cartridge into caulking gun
  • When using 20-ounce propaks, insert propak into a bulk caulking gun
  • Open propak with a razor knife, then attach cone to the caulking gun
  • Cut the cone slightly smaller than the width of the joint
  • Fill joint from the deepest point, to the surface
  • Dry tool joints to create a smooth, concave shape
  • Refer to the MasterSeal NP 1 technical data guide for more information.

Sealant Application Materials, Tools and Accessories

Materials, Tools and Accessories – Shown

  • Protective Gloves – 4-mil nitrile, disposable glove
  • Protective Clothing – Long-sleeve sweatshirt
  • MasterSeal P 176 Primer – High-solids, low-VOC, solvent-based primer for priming joints and substrates
  • Brush
  • Backer Rod – Closed-cell, polyethylene foam, joint filler
  • Wooden Rod, Tapered – Used to press the backer rod completely into the joint
  • MasterSeal NP 1 Sealant, 300 ml Cartridge Package – Preferred for smaller sealant applications
  • Razor Knife
  • Caulking Gun – Manual
  • MasterSeal NP 1 Sealant, 20-Ounce ProPak Package – Economical and efficient for larger sealant applications
  • Bulk Caulking Gun – Manual
  • Bulk Caulking Gun Cone
  • Caulk Spatula – Give a smooth, concave shape to the sealed joint.

Precautionary Accessories – Not Shown

Refer to the MasterSeal NP 1 Safety Data Sheet (SDS) for more information.

  • Eye Protection
  • Face Protection
  • Respiratory Protection – In case of inadequate ventilation
  • Tool Belt.

Citations

Last Modified: May 27, 2019