Protective paint coating systems have become more prevalent in the last decade as the building materials we use continue to become more expansive and adjustable to the materials that they are attached to. Plastic can expand and contract tremendously creating an effect of pulling away from itself. Rubber is no different. This is not a desirable characteristic of building materials, especially exterior materials. Elastomeric coatings expand and contract, but do so without having any seams. However, this product has a very specific application method that must be followed or it will not work correctly.
Elastomeric Coating Application
Using a paint sprayer, a thin coat of elastomeric coating can be applied to virtually any smooth, clean, dry surface. The paint must be sprayed in thin coats in order to keep it from cracking as it drys. The reason it cracks if too thick is because the fast drying time (usually under 1 hour but most manufacturers recommend 2-4 hours before walking on the surface again) the polymers that bond the material together start very strong and as the paint drys it automatically shrinks which is a normal characteristic of paint. However, because this coating expands and contracts with temperature, the content temperature in the can is significantly different form the constant exposure of the outdoors, causing the polymers to lose some of their strength during the drying process. This is why 2 to 3 coats are recommended. This coating will last for about 10 to 15 years if applied correctly. After that, it is simply sprayed or scrubbed off and reapplied.
Typical Reasons for Elastomeric Coatings
Elastomeric coatings are good coverings for materials that have a wide range in temperature. Flat roofing surfaces, spray foam roofing, EPDM roof Patch work protectant, exterior masonry coating, and basement wall interior coatings are all common uses for elastomeric coatings.
These coatings are 99% water proof and with the ability to conform to some minor movement, makes a great water sealer.
These coatings have been used by roofing professionals for over 20 years and are just starting to be more advertised as a solution to moist foundations and flat roof fixes. In time, the use of this material will expand as it has too many good qualities that other products are lacking to work with the building materials that we have today.