I applied Step 1 to my RV roof, let set a bit, then mildly scrubbed with bristle brush and rinsed. After it dried, I used the blue painters tape masking off the areas to be avoided and proceeded to step 2. I assume it works as an activator/adhesive prep for Step 2. The whole process isnt hard , its just time consuming. hot work on the roof in the sun and messy. But it is rewarding when you get done.
Rating:
[4 of 5 Stars!]