Cold Weather’s Effect on Flexible DASH Dual Tank Adhesives
March 20, 2019
Maintaining the proper storage and installation temperature of Versico Flexible DASH roofing adhesive materials will improve the string time/rise time and will also assist in achieving the proper viscosity of the materials; which in turn will help to increase yield/coverage of your Flexible DASH materials.

Problem:

When working in the states highlighted below, you will need to pay attention to the average daily temperatures in relation to the storage and installation of Versico Flexible DASH adhesives.



Here is a simple explanation of viscosity:

Viscosity is a complicated and sometimes confusing topic, and understanding how to lower viscosity is a challenge during cold winter months. A fluid that is viscous will be thick, sticky, and semifluid in consistency. You can lower viscosity by adding friction and/or increasing temperature. In short, the warmer the material, the thinner the fluid - meaning less friction and increased material flow.



Proper material temperatures can also affect the performance of the adhesive. When material temperatures are below the recommended levels, the adhesive cannot properly mix due to the increase viscosity. It is always important to keep your adhesives stored and applied at the temperatures recommended by the manufacturer.

Versico’s Temperature Storage and Application Recommendations Flexible DASH Bulk and Dual Tank



Do not store at temperatures above 100°F or below 50°F. Kits stored below 70°F must be given time for the internal material temperature to warm up to 70°F prior to use. When storing or using adhesives in temperatures below 40°F, the adhesive internal temperature must be returned to 70°F prior to use. Placing adhesive in a heated area (70-90°F) for 4 hours should allow liquid adhesive to reach 70-90°F. In colder temperatures, it is recommended to utilize heated blankets to ensure the tanks are kept warm while dispensing the product.

Solution:

In the winter months, proper material temperatures become imperative. Regardless of the urethane adhesive (DASH or Flexible DASH), material temperatures at the time of installation should be 70°F or rising. When temperatures fall below 70°F, urethane adhesives can experience mixture ratio issues. The use of heated blankets or hot boxes should be used to keep material temperatures above 70°F.

Heated blankets make it easy to lower the viscosity of Versico’s Flexible DASH Dual Tank adhesives. Heated blankets come in various ready-to-ship products, including dual tank and single tank adhesive offerings, and pallet blankets. If you need help with material storage or viscosity reduction, Versico has you covered. Contact your local Versico representative for more information.

Versico has partnered with two equipment manufactures that provide heated blankets. For more information, contact 4C’s Spray Equipment, Amped Equipment, or Advanced Roofing Innovations (ARI).

Heated Blanket Viscosity-Improving Products:





Flexible FAST Frequently Asked Questions

Q: How long will it take a heated blanket to warm a cold tank?
A: Tanks can take anywhere from 4-8 hours to heat back up to the proper application temperature.

Q: Can I use a heated band to warm tank or cylinder products?
A: No -under no circumstances should you use a heated band product with a pressurized tank (Dual Tanks or CAV-GRIP™ 3V). Heater bands can reach temperatures of 300°F – 400°F, which will overheat the tank and cause it to explode.

Q: Are heated blankets safe to use with Dual Tanks? A: Yes, heated blankets have a regulated temperature of 80°F - 100°F and are designed to work with pressurized tanks.

For more information about Flexible DASH Adhesives, please contact Austin Kulp.



    Austin Kulp
    Fleece Membranes & Coatings Product Manager
    Product Marketing
    austin.kulp@carlisleccm.com
December 5, 2019
Seam Probing

Seam probing is an important final step in the hot air welding process because it is a good indicator to determine if proper fusion has occurred between the membrane layers. Whether the membrane is TPO or PVC, both products need to be probed – but with slightly different techniques. Probing must be done once hot air welds have thoroughly cooled (at least 20 minutes). Premature probing can damage warm seams. Hot air welded seams must be probed throughout the day to check seam quality and to make proper adjustments to hot air welding equipment. The repair of deficiencies must be done routinely throughout the day, but no later than the end of each workday. A blunt or dull cotter pin puller is an acceptable tool to perform the probing task. Versico offers a custom-designed Seam Probe that incorporates an ergonomic, threaded handle with a heat-treated, plated steel tip. With continued use these tools will wear down, creating a tip that is too sharp for probing. Blunting the tip is necessary when this occurs. When a substantial amount of probing is necessary, an extension pole can be threaded into the handle of the Versico probe. This allows the operator to stand up while probing long runs of field seams. Getting started Draw your probing tool tip along the edge of the heat welded seam. Apply firm pressure to probe the seam junction, but not into the bottom membrane sheet. The tool will not penetrate into the lap area of a properly welded seam. If the seam probing tool penetrates into the welded overlap area, use a water-soluble marker to mark the beginning and the end of voids or wrinkles in the seam edge. Repair seam deficiencies as soon as possible using the hand held welder. Versico recommends that repairs be made the same day deficiencies are discovered. Probe repaired seams after they have cooled completely. If the repair is acceptable, wipe off the water-soluble marker lines; if not acceptable, repair the seam using standard heat welded overlay procedures. Another reason all laps must be probed each day soon after they have cooled is to verify the welder set-up is effective. Particular attention must be given to all membrane intersections and heat welded seams at insulation joints. In addition, there should be periodic checks (including at the start of each day) to verify good peel strength. Considerations when probing TPO systems 1.) TPO does not "flow" like PVC. If you observe an area in which you see "flow" of the bottom ply, scorched areas of detail/flashing membrane, or scorched field membrane welds, these areas should be probed. If these areas are overheated to the point of membrane damage, an overlay repair will be required even if the weld probes successfully. 2.) A properly heated field membrane weld will typically have a visual "sheen" approximately 1/2" wide on the bottom sheet at the weld overlap. When walking seams, look for the sheen. If it is not present, probe to ensure weld quality.  3.) TPO seams require a minimum 1.5" weld. Welds less than 1.5" must be overlaid as stated in Versico’s specifications and details, even if probing does not produce deficiencies. Considerations when probing PVC systems 1.) Welds on PVC systems should produce "bleed out". Bleed out refers to the flow of the bottom ply (of the top sheet) outside of the weld. If you do not see bleed out at seam areas, this increases the probability the seam did not receive enough heat when it was welded. Be sure to probe these areas to ensure weld quality. 2.) PVC is a “softer” and more flexible membrane than TPO. As such, a different probe should be used than the one used on TPO roofing systems. The PVC probe should have a blunt/dull tip, or utilize a "hook" screwdriver with a flat head.  3.) PVC seams require a minimum 1.5" weld. If you observe welds which are less than 1.5", these should be overlaid following specifications and details, even if probing does not produce deficiencies. Remember, application of Cut Edge Sealant should not begin until all probing is completed. Please contact Jim Gage with questions.     Jim Gage     Senior Technical Specialist     Product Marketing     james.gage@carlisleccm.com

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November 21, 2019
Benefits of Using White P&S EPDM Accessories on TPO Systems

Versico Roofing Systems allows contractors to use several of its productivity-boosting VersiGard® EPDM Peel & Stick accessories on VersiWeld® TPO roofing systems with up to 20-year Total System Warranties. VersiGard White EPDM Peel & Stick (P&S) accessories can provide substantial labor savings on projects with hard-to-flash penetrations and are ideal when using a generator and hand welder isn't practical. Regardless of which roof system is being installed, experienced roofers understand there is always a good chance of encountering hard-to-flash roof penetrations, or simply a high volume of penetrations. Determining the best way to flash these items in a productive manner while ensuring a long-term watertight seal can be a serious challenge. This is where VersiGard White P&S accessories come into play. Keep in mind your alternative EPDM flashing options for TPO systems: Run into a hard-to-flash penetration? VersiGard White P&S Uncured Flashing is an option to consider. This material is highly malleable and adapts easily to odd shapes and surfaces, making it ideal for flashing pipes, scuppers, and other irregularly shaped penetrations. Overwhelmed by hundreds of roof curbs? Boost productivity by flashing curbs with VersiGard 20" White P&S Cured Flashing in conjunction with VersiGard White P&S 7" x 9" Inside/Outside Corners. This is the fastest way to flash roof curbs and can reduce application time by up to 70% when compared to non-P&S flashing options. White EPDM P&S accessories are also a great option for repairs on TPO roofs when access to power is difficult or it isn't practical to use a generator and hand welder. Transporting generators, power cords, and welders to difficult-to-reach roof sections can be cumbersome and labor-intensive. This additional labor can be avoided by white EPDM P&S accessories, since most of these materials will fit snugly into a backpack! If you're interested in receiving a free trial of VersiGard White EPDM Peel & Stick accessories, please submit a request using this form. Approved Products: VersiGard White EPDM P&S Pipe Seals VersiGard White EPDM P&S Pourable Sealer Pockets VersiGard White EPDM P&S Inside/Outside Corners and T-Joint Covers VersiGard White EPDM P&S T-Joint Covers VersiGard White EPDM P&S Uncured Flashing VersiGard White EPDM P&S 20" Cured Flashing     Ryan Ferguson     EPDM Product Specialist     Product Marketing     ryan.ferguson@carlisleccm.com

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October 10, 2019
Special Color TPO Accessories

As the demand for different colored roof membranes has grown, Versico introduced its TPO Color Palette with five new colors. In addition to standard white, gray, and tan, Versico’s TPO Color Palette now features Rock Brown, Slate Gray, Terra Cotta, Patina Green, and Medium Bronze. Projects that use special color membrane from the TPO Color Palette usually need flashings and accessories in the same color. Here, contractors have two choices, one of which is painting standard accessories to match the membrane. However, this is a great opportunity to use Versico’s custom TPO accessory program and avoid painting altogether. All of Versico’s custom accessories are available in the five TPO Color Palette colors, as well as white, tan, and gray. Whether it’s a simple split pipe seal or a complex prefabricated curb wrap, Versico can make it in all eight TPO colors and get it to the job quickly. In addition to being available in eight colors, here are some other great advantages to using custom flashings from Versico: • Save time vs. field fabrication: Trying to field-fabricate flashings can be time-consuming work, even for the most skilled and experienced roofers. Using prefabricated flashings saves time. • No need for paint: There’s no need to prime and paint the accessories to match the membrane; just install and go. • Speed: Custom accessories can be fabricated and shipped within days, not weeks. • Quality: All of Versico’s custom TPO accessories carry the Certified Fabricated Accessory (CFA) stamp of approval, indicating they are eligible for coverage as part of Versico’s Total System Warranty. Next time you have a project using Versico’s TPO Color Palette TPO, consider using custom accessories to make the job faster and easier to install. VersiWeld TPO Special Color Painting Guide  VersiWeld TPO Special Color Program Custom Accessory Quote Request Form      Adam Burzynski     TPO Product Manager     Product Marketing     adam.burzynski@carlisleccm.com

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