CAV-GRIP 3V vs. Traditional Bonding Adhesive
April 23, 2019
With the introduction of Versico’s CAV-GRIP 3V Adhesive, it’s faster than ever to install fully adhered TPO and EPDM. CAV-GRIP 3V can be used to adhere standard TPO and EPDM membranes in weather conditions down to 25°F, with a much faster application rate and flash-off time than traditional bonding adhesive. Check out this time trial video for proof, and use the tips below to ensure maximum speed and efficiency.


Here are some keys to saving time and getting a the most out of CAV-GRIP 3V:
  • Use larger cylinders and hose splitters: CAV-GRIP 3V comes in two sizes -- 85lb. and 40lb. cylinders. Using 85lb. cylinders allows for more coverage without having to change tanks. By using a hose splitter, two people can spray CAV-GRIP 3V from one tank at the same time, allowing for faster application.
  • Keep cylinders warm in cold weather: As CAV-GRIP 3V cylinders get cold, the coverage rate will be reduced and application will become more difficult. Store cylinders inside or in a hot-box at 70-80°Fbefore use. It is also important not to set cylinders directly on a metal deck, as this will accelerate heat loss. Instead, always set the cylinder on insulation and use a Power Blanket to keep it warm during application.
  • Overlap is key: When applying CAV-GRIP 3V to adhere EPDM or TPO in the field of the roof, very little overlap is required. While spraying, try to overlap 1-2 inches to ensure 100% coverage on the back of the sheet and the substrate. However, when using CAV-GRIP 3V to adhere membranes to walls, it is important to overlap 50% when spraying.

  • Use CAV-GRIP 3V and these tips to save a ton of time and labor on the roof. Time previously used to be spent stirring, rolling, and waiting for adhesive to flash off can now be spent laying more squares of roof to get on to the next job more quickly.

    For more information on CAV-GRIP 3V, please visit our Labor Saver page or reach out to Adam Burzynski with further questions.

        Adam Burzynski
        TPO Product Manager
        Product Marketing
        adam.burzynski@carlisleccm.com
    January 9, 2020
    Installation Tips for QA Uncured Flashing Products

    STORAGE: Heat exposure is what causes Quick-Applied (QA) Uncured Flashing to cure on the roof after installation, so storing all your QA Uncured Flashing in a cool place will maximize its shelf life. Versico performed an experiment where Peel and Stick (P&S) White EPDM Corners were refrigerated for 18 months and they were still uncured and usable. Pretty "cool" for a product with a 6-month shelf life! HEAT: Want to make your QA Uncured Flashing easier to work with? Use a heat gun to warm the flashing prior to installation in colder weather. Always heat P&S White Uncured EPDM Flashing, even in the warmer months. Rule of thumb; store cool and install warm! INSTALLATION: Speaking of forming corners, the QA Uncured Flashing stretches and forms better when the elongated diamond pattern is installed parallel to the deck membrane. Additionally, it helps to use the poly film as a separator when folding the corner in half to prevent the exposed tape edges from sticking to each other. POURABLE SEALER POCKETS: One of the biggest mistakes Versico encounters with Pourable Sealer Pockets is improperly applied or missing primer. It is very important to prime the flashing that is turned down into the pocket, as well as the flashing on the top rim of the pocket. Primer is necessary to achieve a long-term bond between Pourable Sealer and the pocket. If separation is present, it's likely that primer application was missed. It is also important and necessary to thoroughly clean and prime penetrations prior to filling pockets with pourable sealer. OUTSIDE CORNERS: Double-wrapping outside corners is a great idea on ballasted systems, especially if the base membrane isn't cut perfectly tight to the curb. QA Uncured Flashing needs to have a solid surface beneath it for long-term performance. If an additional layer of QA Uncured Flashing is installed to eliminate voids at outside corners, the corner flashing will be better able to withstand movement from expansion/contraction forces and will be less likely to develop a hole than if a single layer is used. LAP SEALANT: All QA Uncured Flashing requires Lap Sealant to be applied and feathered over the entire splice edge. Versico has all your flashing needs covered. For more information, please contact your Regional Technical Manager.     Ron Goodman     EPDM Product Manager     Product Marketing     ron.goodman@carlisleccm.com

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    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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