ryhed wrote:
Gdetrailer
Nowhere in the product data sheet does it recommend using it over fiberglass. It needs sanded surface prep minimum for proper adhesion and also requires a primer and two coats of finish in a cross hatched application. I could only assume your preparation technique being a specialty coating applicator for many years, but do tell. Just read the pds.
To the op, while it probably works, I would pick something else, then again I do industrial coatings and those products may not be readily available to you. I used roofmate and added microballoons into it for thermal insulation. Here is a product at lowes that has microballons,http://www.lowes.com/pd_354718-29-5532-1-30_4294934213__?productId=3372930&Ns=p_product_qty_sales_do..., but it is not intended for rv roofs but some have used it in the 700 formula, read reviews. I took two products that were compatible roofmate, epdm compatible white elastomeric coating, and microballoons purchased in the 5 gallon kit from http://www.hytechsales.com/.
I am no fool when it comes to reading labels and following instructions, in fact I painted all four sides of my TT using PPG DCC automotive paints.
At $250 PER GALLON just for the paint not including catalyst or reducer you CAN NOT AFFORD TO MAKE MISTAKES.
My mistake was to use cheapo $30 per gallon Kool Seal brand "rubberized" paint on the roof. It just is not up to par with automotive paints for long life, ease of keeping clean and cleaning.
Painted sides my TT 6+ years ago with automotive paint, sides still look perfect, dirt FALLS off it when it rains or is washed with no wax EVER applied.
But yet that cheapo Kool Seal attracts and HOLDs any and all dirt, is hard to scrub the dirt of it and worst of all HAS worn down to the point of the primer is worn and strands of fiber glass is showing through.
To be perfectly honest as far as evaluation, my TT SITS beside a very busy road, trailer roof is only a few feet above the road level and gets VERY HEAVILY SOILED from road dirt and road salt in the winter. But yet the side of the trailer facing the road painted with automotive paint IS STILL as good as the day it was painted.
You can keep the Kool Seal and your "micro beads". If I was wanting to increase the R Value I would simply remove the existing roof, fir up the roof and ADD REAL insulation (professional spray in place foam works wonders for this application).
I would not fool around with these wimpy rubberized coatings, they are soft and designed to wear off over time just like EPDM, vinyl, or rubber membrane roofs.
