Revision context
Document record
This five-page PDF is an application guideline for the Ure-A-Sil roof restoration system over modified bitumen roof surfaces. Its footer shows the last revision as 9/18/25. The general part states that each job must be approved by American WeatherStar before it begins, to ensure warranty eligibility.
The products part includes Silicone 410, High Solids Silicone 412, Urethane Brush-Grade 522, Aromatic Urethane 520, Aromatic Urethane 508, EcoCleaner 925 and a spunbound polyester fabric. Aromatic Urethane 508 is listed as a dark gray, single-component, moisture-cure urethane with 475% elongation and 725 psi tensile strength.
The surface preparation part covers removal of unnecessary equipment and debris, pressure washing at a minimum working pressure of 3,000 psi, and removal of wet insulation and damaged membranes. It also lists HVAC stanchions, which should be in good condition or replaced, and routing of HVAC condensate drains.
The installation section sets out a primer step with an adhesion test, and flashing of seams, penetrations, curbs and parapet wall details with Urethane Brush-Grade 522.
Material changes / notes
Official manufacturer document matched through the system page document filters. Confirm its revision and applicability at source before use.