Dicor Self-Leveling Ultra Sealant is a high-performance polyether sealant that contains no solvents or isocyanates and is non-yellowing. It's designed to fill voids and joints and seal around RV rooftop accessories where a self-leveling sealant maybe preferred. Ultra Sealant is fast curing, highly weather-resistant and can be painted with most paints. NOTE: Polypropylene RV roof accessories and some membranes MUST be primed with Dicor Ultra Sealant Primer prior to resealing. Designed to fill voids & joints & seal around RV rooftop accessories Fast curing & highly weather-resistant Can be painted with most paints | Dicor Self-Leveling Ultra Sealant, White