Silicone Sealant Repairs Roofs, Masonry and Sheet Metal

The 100 percent Silicone Sealant seals and repairs roofs, masonry, architectural sheet metal, and metal roof seams and fasteners.

The 100 percent Silicone Sealant seals and repairs roofs, masonry, architectural sheet metal, and metal roof seams and fasteners.

Mule-Hide Products Co. has added 100 percent Silicone Sealant choices to its Silicone Roof Coating System, expanding the color offering to include clear and the packaging options to include 10-ounce tubes.
 
100 percent Silicone Sealant is a mastic version of the Mule-Hide 100 percent Silicone Roof Coating. It is a moisture-cure silicone sealant designed for use in sealing and repairing roofs, masonry, architectural sheet metal, and metal roof seams and fasteners. 
 
The addition of clear sealant allows contractors to complete projects that would otherwise require color-matching. It is available packaged in tubes only.

In addition to clear, the tubes are available filled with white sealant. The plastic cartridges are an option for use in smaller applications or when precision is required. They also can be submerged under water to repair roof leaks, gutters and downspouts.
 
100 percent Silicone Sealant provides adhesion to concrete, masonry, polyurethane foam, EPDM membranes, TPO membranes, aged PVC membranes, aged acrylic coatings, granular cap sheets, wood, metals, Kynar finishes and most other building materials. When using 100 percent Silicone Sealant with a TPO roof membrane, Mule-Hide Si TPO Primer must be applied first. 
 
The sealant has minimal odor, making it contractor- and building-occupant-friendly. Its volatile organic compound (VOC) content of less than 10 grams per liter makes it acceptable for use in areas with VOC restrictions. It does not corrode metals.
 

Kemper System Will Showcase Liquid-Applied Protective Solutions at IRE

Kemper System America Inc. will showcase a range of cold liquid-applied protective solutions for the building envelope at the International Roofing Expo (IRE) in Las Vegas, March 1-3, and demonstrate product application at booth 217.

Kemper System protects surfaces across the globe. Solutions to be featured at IRE include:

  • Two fully reinforced membrane systems that can transform roof decks into reflective cool roofs, or provide monolithic protection for green roofs, blue roofs, and a range of other projects.
  • Two new coatings systems for protecting surfaces prone to heavy wear such as parking garages, balconies and walkways.

Waterproofing Membrane Systems

The two reinforced waterproofing membrane systems are cold liquid-applied and ideal for cool roof applications:

  • Kemperol AC Speed FR system is a Polymethyl Methacrylate (PMMA)
  • Kemperol Reflect 2K FR is a low-VOC system

Both are fire rated for Class A assemblies and exceed LEED solar reflective requirements with SRI ratings of 108 and 110, respectively.

Durable Wear Coatings

For protecting parking garages, pedestrian decks, and loading docks, the COLEAN Parking System can withstand deterioration caused by natural elements and vehicular traffic. In addition, the COLEAN Balcony System, which is designed to expand and contract with normal structural movements, protects balconies, terraces, walkways, patios, sun decks, and machine rooms from freeze/thaw damage and chemical exposure.

Kemper System America also offers a way to prolong the life of existing roofs with elastomer-based coating systems, one of four technologies added through the acquisition of STS Coatings Inc. in December.

“Our building envelope solutions go beyond roof waterproofing to make the building specifier’s job easier. These solutions create opportunities for contractors and value for building owners,” says Richard Doornink, president and managing director of Kemper System America Inc.

For over 60 years, Kemper System has led in cold-liquid applied, reinforced roofing and waterproofing, having invented the technology and holding the first patents. Today the company offers a range of building envelope solutions to protect against weather, preserve the integrity of surfaces, and enhance the comfort and value of public buildings and commercial real estate.

Visit IRE booth 217 to learn more, or contact Kemper System at inquiry@kempersystem.net, or call 8(800)541-5455.

Firestone Releases Sustainability Report

Firestone Building Products Company LLC has released the “2015 Global Sustainability Report” detailing the company’s progress in achieving its environmental goals and fulfilling its commitment to contributing to an environmentally sustainable society. The report, which provides an overview of the company’s environmental performance measured using criteria set forth by the Global Reporting Initiative (GRI), demonstrates how Firestone is using metrics to drive performance across its business. 
 
Firestone had a number of accomplishments that are outlined in the 2015 report. By focusing its efforts on three key areas: people, process and products, Firestone:

     

  • Launched two new products with near zero Volatile Organic Compounds (VOCs), making it safer for contractors, building occupants and the environment
  • Increased the number of voluntary reporting indicators from 10 to 37 for greater transparency in reporting
  • Decreased wastewater discharge by 23 percent between 2014 and 2015

 
“Firestone has a long-standing commitment to driving the type of innovation that will enable our products to meet global standards throughout their lifecycle – from production to performance,” says Tim Dunn, president, Firestone Building Products. “It is through the dedication and hard work of our employees worldwide that we are able to make environmental improvements in our products and processes, and demonstrate leadership in our industry.
 
Firestone is adhering to the GRI G4 reporting standard to ensure comprehensive sustainability reporting. The company expects certification to the G4 standard later this year.
 
As part of Bridgestone Americas, Firestone is committed to being a good corporate citizen globally, nationally and especially in the communities where it has manufacturing facilities, sales facilities and offices. Bridgestone Americas’ parent company, Bridgestone Corp., was recently named to the Dow Jones Sustainability World Index for the first time, and the Dow Jones Sustainability Asia Pacific Index for the seventh consecutive year. Firestone’s corporate citizenship commitments extend beyond sustainability. In 2015, Firestone employees gave their time and talents in plant and headquarters communities to organizations that support education, the arts, health and wellness, and work to improve peoples’ lives.
 
To learn more about Firestone Building Products, or to download a copy of the 2015 Firestone Building Products Global Sustainability Report, visit firestonebpco.com.

Better Understand Why the Combination of Moisture and Concrete Roof Decks Is Troublesome

The primary function of a well-built and well-designed roofing system is to prevent water from moving through into the building below it. Yet, as the Rosemont, Ill.-based National Roofing Contractors Association has observed, an increasing number of “good roofs” installed on concrete roof decks have failed in recent years. Blistering, de-bonding and substrate buckling have occurred with no reports of water leakage. Upon investigation, the roofing materials and substrates are found to be wet and deteriorated.

Wagner Meters offers moisture-detection meters for concrete. The meters are designed to save time and money on a project or job site.

Wagner Meters offers moisture-detection meters for concrete. The meters are designed to save time and money on a project or job site.

Why is this? One potential cause is trapped moisture; there are numerous potential sources of trapped moisture in a structure. Let’s examine the moisture source embedded within the concrete roof deck.

WHY DOES THIS MOISTURE BECOME TRAPPED?

It often starts with the schedule. In construction, time is money, and faster completion means lower cost to the general contractor and owner. Many construction schedules include the installation of the roof on the critical path because the interior building components and finishes cannot be completed until the roof has been installed. Therefore, to keep the project on schedule, roofers are pressured to install the roof soon after the roof deck has been poured. Adding to the pressure are contracts written so the general contractor receives a mile- stone payment once the roof has been installed and the building has been topped out.

Historically, roofers wait a minimum of 28 days after the roof deck is poured before starting to install a new roof. This is the concrete industry’s standard time for curing the concrete before testing and evaluating the concrete’s compressive strength. Twenty-eight days has no relation to the dryness of a concrete slab. Regardless, after 28 days the roofer may come under pres- sure from the general contractor to install the roof membrane. The concrete slab’s surface may pass the historic “hot asphalt” or the ASTM D4263 Standard “plastic sheet” test, but the apparently dry surface can be deceptive. Curing is not the same as drying, and significant amounts of water remain within a 28-day-old concrete deck. Depending on the ambient conditions, slab thickness and mixture proportions, the interior of the slab will likely have a relative humidity (RH) well over 90 percent at 28 days.

FROM WHERE DOES THE WATER COME?

Upon placing the concrete slab, the batch water goes to several uses. Portland cement reacts with water through the hydration process, creating the glue that holds concrete together. The remaining water held in capillary pores can be lost through evaporation, but evaporation is a slow, diffusion-based process. The diffusion rate of concrete is governed by the size and volume of capillary pores which, in turn, are controlled by the water/cement (w/cm) ratio. The total volume of water that will be lost is controlled by the degree of hydration, which is primarily related to curing and w/cm.

A 4-inch-thick concrete slab releases about 1 quart of water for each square foot of surface area. If a roof membrane is installed before this water escapes the slab, it can become trapped and collect beneath the roof system. The water does not damage the concrete, but it can migrate into the roofing system—and that’s when problems begin to occur. For instance, moisture that moves into the roofing system can:

  • Reduce thermal performance of the insulation.
  • Cause the insulation, cover board, adhesive or fasteners to lose strength, making the roofing system susceptible to uplift or damage from wind, hail or even foot traffic.
  • Lead to dimensional changes in the substrate, causing buckling and eventually damaging the roof membrane.
  • Allow mold growth.

A number of factors compound the problem. In buildings where a metal deck is installed, moisture cannot exit the slab through its bottom surface. Instead, the moisture is forced to exit the slab by moving upward. Eliminating one drying surface almost doubles the length of drying time of a concrete slab. The small slots cut in ventilated metal decking have little effect on reducing this drying time.

Ambient conditions also affect the drying rate of a concrete slab since it readily absorbs and retains moisture. Additional moisture may enter an unprotected roof slab from snow cover, rain or dew. Even overcast days will slow the rate of drying.

A MODERN-DAY PROBLEM

Before the introduction of today’s low-VOC roofing materials, historic roof systems didn’t experience as many of these moisture issues. Typically, they were in- stalled onto concrete decks on a continuous layer of hot asphalt adhesive that bonded the insulation to the deck. This low-permeable adhesive acted as a vapor retarder and limited the rate of moisture migrating from the concrete into the roofing assembly. As a result, historic roof systems were somewhat isolated from moisture coming from the concrete slab.

Many of today’s single-ply roof membranes are not installed with a vapor retarder. Moisture is able to migrate from the concrete slab into the roof materials. Modern insulation boards are often faced with moisture-sensitive paper facers and adhered to substrates with moisture-sensitive adhesives. These moisture-sensitive paper facers and adhesives are causing many of the problems.

Rene Dupuis of Middleton, Wis.- based Structural Research Inc. recently presented a paper to the Chicago Roofing Contractors Association on the subject. Some of his findings include the following:

  • Due to air-quality requirements, government regulations curtailed the use of solvent-based adhesives because they are high in VOCs. Consequently, manufacturers changed to water-based adhesives because they are lower in VOCs, have low odor, are easy to apply and pro- vide more coverage.
  • There can be several drawbacks to water-based bonding adhesives. One is that they may be moisture sensitive. Moisture and alkaline salts migrating into roof systems from concrete decks can trigger a negative reaction with some water-based adhesives. This reaction can cause the adhesives to revert to a liquid, or it may alter or delay the curing of some foam-based adhesives. Some adhesive manufacturers have recognized these problems and have be- gun reformulating their adhesives to address these drawbacks.
  • Negative reactions also occur when moisture-sensitive paper facers come into contact with moisture. This reaction typically results in decay, mold growth and loss of cohesive strength. Moisture in the roof system may also cause gypsum and wood-fiber-based cover boards to lose cohesive strength.

Dupuis noted moisture from any source can compromise adhered roof systems with wind uplift when attached to paper insulation or gypsum board. He also said facer research clearly shows paper facers suffer loss of strength as moisture content increases.

PHOTOS: Wagner Meters

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GenFlex Roofing’s EZ TPO Peel & Stick Membrane Extends the Installation Window for Contractors to 20 F

GenFlex Roofing Systems has introduced an enhanced self-adhesive technology for its EZ TPO Peel & Stick membrane.

GenFlex Roofing Systems has introduced an enhanced self-adhesive technology for its EZ TPO Peel & Stick membrane.

Indianapolis-based GenFlex Roofing Systems has introduced an enhanced self-adhesive technology for its EZ TPO Peel & Stick membrane. The new adhesive formula offers twice the bonding strength of competitive self-adhesive products (by pound foot per inch in peel testing) and can be installed in temperatures as low as 20 F and as high as 120 F.

The improved Peel & Stick adhesive allows contractors to maximize their productivity. By avoiding separate transportation, mixing, priming and application of adhesive, as well as clean-up of associated rooftop clutter, the self-adhesive membrane means significant time and labor savings. The pre-formulated and factory-applied adhesive also equals uniform performance.

The new EZ TPO Peel & Stick adhesive has no VOCs and is odor-free. By exceeding low-VOC-emissions requirements, the EZ TPO Peel & Stick membrane is safe for installers and building tenants, avoiding any delays or concerns when working in occupied buildings. In addition, the product’s durability and solar reflectance make it an energy-saving option.

PHOTO: Genflex Roofing Systems

Quest Construction Products Is Trademark Licensee of Kynar Aquatec Coating Technology

Arkema Inc. is pleased to announce that Quest Construction Products is now a trademark licensee of Kynar Aquatec high-performance coating technology in North America. Quest Construction Products uses Kynar Aquatec technology as the basis for its Kymax brand of protective coatings for new or existing roof surfaces.

“While we have a long history of partnering with Quest Construction Products on their high-quality Kymax coatings, it gives us great pleasure to welcome them as an official licensee of Kynar Aquatec,” said Vince Casmirri, marketing manager of architectural coatings at Arkema Inc. “Our licensing program is a key component of our strategy to provide customers the support and innovative technology they need to succeed, and we are pleased with the outstanding recognition that Kymax coatings has achieved in the cool white roof market.”

Kynar Aquatec is an innovative platform of emulsions for producing premium water-based coatings with low VOC levels below 100 grams/liter. Coatings formulated with these emulsions can provide the durability and performance of traditional Kynar 500 resin-based coatings and can easily be applied to a variety of substrates, including metals, plastics, wood, concrete, textiles and previously painted surfaces. Given their low-VOC waterborne character, excellent durability and weatherability, and ability to be formulated with IR reflective pigments for lasting building efficiency, the Kynar Aquatec emulsions offer sustainable coating solutions for a wide variety of building requirements.

“We are extremely pleased to have been selected as an official trademark licensee of Kynar Aquatec latex,” said Michelle Carlin, product manager at Quest Construction Products. “This program provides a growth platform for strong brand owners in the architectural roof coatings market by capitalizing on the proven success of Kynar Aquatec technology by Arkema.”

Kymax coatings are manufactured using Kynar Aquatec emulsions to deliver the proven durability and performance of traditional Kynar PVDF coatings. However, rather than requiring high-temperature baking, they are air-dry finishes that cure at ambient temperatures. Designed as a liquid applied roofing product over new or existing roofs, Kymax provides the ultimate in reflectivity, color stability, algae resistance and weatherability. It is also certified to meet ENERGY STAR, Cool Roof Rating Council (CRRC), LEED and California Title 24 reflectance and emissivity criteria.

PPG Publishes Info about Water-based ENVIRON MCL Coatings

PPG Industries’ industrial coatings business has published an informational guide about ENVIRON MCL coatings, an environmentally friendly, water-based coating for application on metallic coating lines over GALVALUME coated sheet steel and hot-dipped galvanized metal.

Environ MCL products provide a permanent coating that is superior to temporary anti-fingerprint coatings available on the market and extends the life of buildings by offering lasting aesthetics with enhanced solar reflectance (SR), ultraviolet (UV) protection and corrosion resistance. Available as a clearcoat or in a selection of colors, Environ MCL coatings have a minimum SR capability of 70, which enables them to reduce energy costs and improve comfort in metal building structures.

The guide includes performance specifications with data for dry film thickness, post-cure pencil hardness, solar reflectance, salt-spray and humidity resistance, accelerated weathering, and outdoor exposure.

As a water-based product with low VOC (volatile organic compound) content, Environ MCL coatings protect the environment by encapsulating zinc from the metal substrate to eliminate toxic runoff into the water supply. The coatings also can be applied on mill coatings lines, which can reduce costs by eliminating the need to send metal to a coil coater for processing.

Typical exterior applications for Environ MCL coatings include metal roofing, agricultural buildings, and shade and shelter structures. The coatings are also suitable for interior uses such as ceiling grids, structural steel, linear panels and roof decking.

Single-step Roof Coating

ERSystems' OneStep roof coating

ERSystems’ OneStep roof coating

Get the project done quickly with a single-pass roof coating from ERSystems. OneStep is a white, low-VOC, reflective, high-performance elastomeric coating. The product is a liquid-applied, single-component, moisture-cured modified silane. OneStep is designed to provide superb adhesion to a variety of substrates. OneStep Finish Coat is a “tough” coating and provides superior UV stability and weathering characteristics. The low-odor coating is designed to restore multiple substrates. It has excellent adhesion to asphalt, single ply, spray polyurethane foam and concrete.