RE: White Siliconized Elastomeric RV Roof Coating
It will work fine for both lowering solar heat gain and sealing the roof. Make sure you thouroughly clean the roof and apply 2 coats to get a good thick flexible coating. A heavy duty airless sprayer is the best way to apply if you have access to one. The light duty homeowner sprayers will not work well because the material is very thick.