Elongate Roof Life
Experienced roofers understand that ponding water on flat roofs can result in damage from leaks and mold. As water ponds and sits on roofs, it can act as a magnifying glass for the sun’s UV rays and expedite the deterioration of the substrate. With that in mind, this blog looks at Progressive Materials’ SL-850 Ponding Water Eliminator and explains how it can elongate the life of roofs that have standing water on them.
Ponding Water Threats
Some puddles here and there after the rain stops are normal. However, water that sits on the roof for extended periods of time can cause premature aging. The sun’s UV rays get even stronger as they travel through the water and create trouble areas in those areas. Ponding water also encourages mildew growth, which can seep through the substrate and cause serious damage.
What Is SL-850
SL-850 combats the wear and tear of ponding water by eliminating the ponding areas altogether. This tough, durable material — a thick, concrete-like 100% silicone — can be used to fill low areas of a roof surface. It is designed to be used in conjunction with the PM Silicone Roof Restoration system and can be applied over virtually any roof substrate.
Application
This granular product is not designed to be sprayed or rolled like our typical silicone. Instead, simply pour SL-850 onto the ponding area and use a putty knife or trowel to smooth and level to the desired thickness. One of the many benefits of SL-850 is that it can be applied up to 1-inch thick, making almost any ponding area a non-issue.
To see the SL-850 in action you can watch an installation video here.
After allowing SL-850 to cure, you can coat the roof with PM’s high or standard solids silicone. That will provide a ponding-free, watertight, and UV-resistant roof.
Conclusion
It’s worth noting that PM’s silicone roof coatings will not break down under ponding water like some other roof substrates. However, ponding water should be eliminated whenever possible as its presence, even on silicone, can lead to issues down the road.
If you have specific questions about SL-850 or any PM product, you can reach out to your Regional Manager here.
Thanks for reading.
