Tuff Rubber Roof Coating - 3.5 Gallon for RVs, Mobile Homes, and Trailers. Tuff Rubber Roof Coating is an instant weathering shield using a superior combination of ingredients developed for value driven performance. Elevated levels of all the essential components give you superior cooling – and elastomeric qualities – all packaged into an easily applied coating which cures into a flexible and durable layer without seams. Applies using ordinary roller or airless spray direct to clean and properly prepared roofs that drain well and do not pool water. Cured Tuff Rubber Roof Coating is suitable for all climates.