Adhesive for Polycarbonate Snow Guards

By Brion P. McMullen, Bio

The invention of Surebond SB-190 is responsible for making “polycarbonate” snow guards today’s most popular choice for snow avalanche control on metal roofs.  Adhesive attachment is the safest and best snow stop mounting solution for metal panels that can not accept through fasteners such as floating standing seam or insulated panels.  Additionally, to protect the integrity of the metal roof, many installers and designers do not wish to penetrate or clamp anything to the roof making a glue down style snow retention system the most attractive solution.

The adhesive attachment method for snow guards is the least likely to cause damage to a metal roof if the system becomes overloaded.  Generally, the worst that can happen is that the guard will release harmlessly if loaded beyond it’s design capacity.  The snow stop can then be reattached in the same spot without adverse affects to the roof or the guard. The release of an adhesive mounted snot stop is a very rare occurrence when used with properly designed systems that are installed at the proper time of the year.  Because the shear strength of the adhesive is only as good as the surface it is attached to, adhesives should not be used on EPDM style membranes, slate, or some shingle style panels.  Always check with the manufacturer of the roofing system to be certain.

Snojax, Inc. pioneered the use of Surebond SB-190 for its polycarbonate snow guards in 1986.  After testing many adhesives over the years, the best performer still continues to be Surebond SB-190 due to its 2,000lbs/sq in. tensile strength, 500% elongation, and superior exterior UV resistance.  Surebond SB-190 has been used successfully on Snojax snow stops in the field for over 26 years, which is a testament in itself.

The SB-190 creates a chemical bond that etches itself to the polycarbonate as it cures and is safe to use on most factory painted roof panels. Just about any properly designed, UV stabilized, virgin grade polycarbonate snow stop with a forward mounted face design can be adhered successfully to most any type of factory painted metal roofing panel where the flat surface of the panel is wide enough to accept mounting. The SB-190 adhesive is only recommend for used with polycarbonate snow guards because UV from the sun plays a crucial part in the curing process. Consumers should always review the manufacturers professional test results before choosing a particular brand of snow guards for their metal roof.

Once installed on a polycarbonate snow guard, Surebond reaches about 90% strength in 14 days of consistent temperatures above 50°F. The minimum application temperature is 50°F and at least 30 days of curing time is required to achieve a full bond strength. In temperatures less than 40°F, the curing of SB-190 simply enters a dormant state and then resumes its cure when the temperature exceeds 50°F again. This does not ruin the curing process however it will prolong the time that it takes to achieve a full cure.  After nearly 30 years of manufacturing the SB-190, there is still no competing adhesive that can match the published ATI Snow Guard Test Results commissioned by SnoBlox-Snojax.

SnoBlox-Snojax has 6 different models that are professionally tested with the SB-190. Some models will fit metal panel flats as narrow as 1.5 inches and others that can straddle minor rib striations in the panel.  The newer generation of patented SnoBlox and IceJax snow stops have been designed with features to make them work even better with the Surebond adhesive attachment method.  The patented waffled base of the Deuce and Ace products allows the Surebond SB-190 a more efficient bonding surface and the forward mounted face design minimizes the leverage points.  The engraved base of the IceJax II model will withstand an outstanding 1,500 lbs. of force per guard prior to attachment release.  This is the highest published professional ATI Laboratory test result in the industry for any adhesive polycarbonate snow guard.

In conclusion, SnoBlox-Snojax polycarbonate guards mounted with SB-190 are an excellent “safe choice” for most metal roofs as long as the snow retention system is competently designed, has been professionally tested and is installed to the manufacturer’s specification.  To make sure your project is a success, start a free project layout at or by calling one of the system designers at 1-800-SNOJAX-1.

See how easy it is to attach polycarbonate snow guards to metal roofs using Surebond products by watching the Installation Video.

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22 thoughts on “Adhesive for Polycarbonate Snow Guards

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  4. Antone Estelle

    I do not even know how I ended up here, but I thought this post was good. I don’t know who you are but definitely you’re going to a famous blogger if you aren’t already ;) Cheers!

  5. Vernon

    Hi there, after reading this awesome snow retention article i am as well glad
    to share my familiarity here with friends.

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    I am really impressed with your writing skills and also with the layout on your snow guards web blog. Is this a paid theme or did you modify it yourself? Anyway keep up the nice quality writing, it’s rare to see a nice blog like this one these days..

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  8. Kandi Ellington

    My wife and I will be installing snow guards in the spring thanks to this very useful information. We waited too long to do it for this Winter.

  9. Stephan Schindler

    I know that your business promotes applying snow guards with adhesive but I was pretty skeptical. This article put me at a ease a bit.

  10. Mason Sessums

    I was just getting ready to place an order for some snow guards and adhesive. After reading this…I think I will wait until the spring.

  11. Forest Bettington

    We desperately need snow guards on our building. I will be getting in touch with your company shortly to place an order.

  12. Layne Reinhard

    I guess this explains why my snow guards had come off of the roof. I should have paid more attention to the instructions. lol

  13. Jacquelyn Vickery

    My husband was going to install these this week, but after reading about the temps required to install our snow guards…i think i will tell him to hold off on it for a couple of weeks. Thanks

  14. Lydia Monroe

    My husband just finished reading this and is already ordering some of your snow guards. I’m glad we won’t have to deal with the same problems that we had this last winter. I’m sick of replacing gutters.

  15. Booker Handcock

    It looks like I need to wait a little longer until I can install these snow guards. Better safe than sorry.

  16. Christin Glaspie

    After reading this, it looks like I need to get my butt in gear and get some snow guards. I’m going to be installing with adhesive.

  17. Archie K Nasso

    I’m really glad that I read this and didn’t install snow guards with the glue during the winter. I hate doing things twice so this saved me lots of time and effort. Thanks

  18. Vernell Slade

    I was hesitant about installing snow guards with adhesive, but after reading this, I am much more at ease with it. It may be a little late for me to do it this year, though.


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