Helix® Low-Rise Adhesive is a two-component, construction-grade, polyurethane foam adhesive designed to adhere approved roof insulations, thermal barriers, cover boards and fleece-backed single-ply membranes to acceptable substrates. Helix Adhesive is VOC, CFC, HCFC and solvent free. Helix Adhesive is applied in continuous ribbons or beads spaced 4"", 6"" or 12"" on center depending on the project and code requirements. Helix Adhesive is a completely new product in the industry and not a relabeled, existing adhesive. Helix Adhesive is gray in color, which is unique in the industry and aid in identifying Mule-Hide as the manufacturer."
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Features & Benefits
- Low-VOC Compliant
- Non-penetrating attachment
- Approved to be applied direct to multiple substrates
- Increased uplift rating with Fleece Back membranes
- Outdoor temperature must be 40°F and rising for 48 hours
Does Helix Adhesive look different than the other products on the market?
Helix Adhesive is gray, which is unique in the industry.
How cold can it be when I use Helix Adhesive?
The substrate and ambient temperature must be above 32°F when using Helix Adhesive. If temperatures are below 50°F, the adhesive must be kept warm before use.
Can I full spray or splatter pattern Helix Adhesive?
No. Helix Adhesive is applied in ¾" wide beads or ribbons spaced 4", 6" or 12" on center depending on the conditions of the project.
Does Mule-Hide have all of the rated systems with Helix that it had before with other foam manufacturers?
Not automatically. Since Helix is a completely new product and not just an existing product relabeled, testing is required before it can retain the listings previously held with other manufacturers. Our vendor has expended, and will continue to spend, a great deal to get the listings we had before plus additional listings. The testing process is at the mercy of the regulating bodies’ schedule and work flow. There is a logical progression of testing that must be followed to ensure the proper requirements are met.
What do I do if I need a listed system and it’s not offered with Helix Adhesive?
You can always use the foam manufacturer tested in the listing. Mule-Hide will issue a labor and material warranty on qualifying systems. If Mule-Hide has a listing utilizing the Helix Adhesive and the contractor uses a different manufacturer without prior approval from Mule-Hide, a warranty will not be issued.
What do I do if I can’t get all of the asphalt off of the deck before installing Helix Adhesive?
Helix Adhesive does not stick to new, or previously unexposed, asphalt that has a shiny appearance. Whenever shiny asphalt is encountered, the asphalt must be primed with CAV-GRIP prior to the installation of Helix Adhesive.
How much more expensive is it to attach insulation with Helix Adhesive versus fasteners?
Material costs to adhere insulation to a roof deck using Helix Adhesive is much more expensive than using screws. As a general rule, material costs to use Helix Adhesive is around 5 to 6 times more expensive than using screws when one layer of insulation is installed. Unlike mechanically fastening insulation where only the top layer is fastened, each individual layer must be adhered when using Helix Adhesive. However, some of the major benefits to using Helix Adhesive can greatly reduce costs in other areas of the project.
Does it matter what kind of tip I use on the gun or cartridge?
Yes, absolutely! Each manufacturer designs mixing tips to create the desired 1:1 ratio based on the properties of their product. You must use Helix mixing tips when using the Helix Gun Assembly or Cartridges. Failure to use Helix mixing tips results in off-ratio mixing and the Helix Foam will not properly rise.
What membranes can be adhered with Helix Adhesive?
Only fleece-back membranes can be adhered using Helix Adhesive. Currently, Mule-Hide offers TPO, PVC, and PVC KEE HP in fleece back configurations.
What is the shelf life of Helix Adhesive?
Helix Adhesive has a shelf life of approximately 12 months when stored in an upright position at 50°- 90°F in its original unopened container. Storage temperatures above the recommended range shorten shelf life. Do not store in direct sunlight or temperatures higher than 90°F, such as using it for tarp weight on a roof. Helix Adhesive should be store in a covered, secure location. Keep from freezing. Product stored below 50°F must be given sufficient time (minimum 24 hrs.) for the adhesive to warm up prior to use.
Can I adhere directly to an existing PVC single-ply membrane with Helix Adhesive?
No. PVC is not an approved substrate for Helix Adhesive. In addition, Helix is not approved for attachment to existing EPDM single-ply membranes, acrylic or aluminum coatings.
Who does adhesion tests?
It is recommended that adhesion tests be done by Mule-Hide. Adhesion tests are scheduled through Mule-Hide Territory Managers.
What is a positive adhesion test?
Helix Adhesive tests are simple "shovel" tests. The existing substrate is prepared in the same manner as the specification and then a piece of the specified insulation is adhered using Helix Adhesive. Once cured, the insulation is pried off of the substrate with a shovel. A positive adhesion test is when the board breaks before the insulation peels off of the substrate. If specific uplift values are required, fully metered and measured pull tests can be performed based on ANSI/SPRI IA-1 Field Test Standards.
Why are some adhesion tests "recommended" and others are "required"?
Low-rise foam adhesives have performed well for nearly two decades. Over the past two decades, experience in the market has created an industry accepted list of best practices. Mule-Hide recommends adhesion tests on those substrates that have a lengthy history in the market with known characteristics. Mule-Hide requires adhesion tests on substrates that do not have an established history in the market or have critical variables that, if left unaddressed, will adversely affect the bond of Helix Adhesive. As always, good roofing practice dictates that adhesion tests should be done on all projects to ensure a quality bond using foam adhesives, regardless of whether they are recommended or required.
Will I have to fill out two warranty applications like I did before when I used foam adhesives in my Mule-Hide roofing system?
In the past, Mule-Hide would issue labor and material warranties on projects that used Millennium One Step™, INSTA STIK™ and OlyBond 500™ adhesive. However, the contractor would receive two warranty documents: the Mule-Hide roofing system warranty and a separate adhesion warranty from the foam manufacturer. This arrangement put additional steps into the process for both the contractor and Mule-Hide. When the contractor uses Helix Adhesive, only one warranty application and one warranty document will be required. Separate warranty documents are necessary on projects requiring a listed system using Millennium, INSTA STIK and OlyBond adhesive until Helix Adhesive is approved for those listings.
Why do I have to use Dow STYROFOAM™ Brand DECKMATE™ Plus FA Insulation for extruded insulation?
Our tests have shown that foam adhesives do not stick well to the smooth surface of extruded polystyrene insulation. DECKMATE Plus FA has a planed surface which increases adhesion.