Where to Use SOMAY Roof Coatings
SOMAY ROOF MASTIC has been proven very effective for years on all well-drained, smooth roof surfaces, including asphalt shingles, asbestos shingles, fiberglass shingles, composition shingles, tar paper or roll roofing, concrete, including poured reinforced concrete sloped roofs, concrete tiles and barrel tiles, slate, plastic, rigid urethane foam insulation, smooth metal, galvanized metal, corrugated metal, smooth wood such as plywood sheathing, mobile home roofs, etc.
For information on waterproofing flat roofs on which water collects in puddles after a rainstorm, please click here.
No matter which type of roof surface you need to waterproof, SOMAY ROOF MASTIC has White, 5 Stock Colors and Clear available.
Flat Roofs with Ponding Water - According to Miami-Dade County Building Code, a roof must have a minimum slope of ¼-inch per 12 inches to be considered a sloped, or pitched or inclined roof. Roofs with less pitch are considered "flat" roofs. SOMAY does NOT recommend the SOMAY "ROOF MASTIC" system be applied on a "flat" roof that has "ponding" water (puddles of water after a rainstorm). Rather SOMAY believes one should use only coatings especially formulated for constant immersion in water.
SOMAY Product No. 814-01, Rubber Waterproofing Coating, "Reflective White", is a single-component, rubber-copolymer, elastomeric waterproofing sealant and coating for flat roof surfaces. It has Energy Star® and UL Class A Fire Rating Certification. Apply two (2) coats, each at a maximum spreading rate of no more than 70 sq.ft./gal. per coat on a smooth, non-porous surface, to develop 10 mils DFT per coat, totaling 20 mils DFT for 2 coats. Rough and/or very porous surfaces will require the use of considerably more material to develop the required dry film thickness. Substitute SOMAY "Polaroof RAC" as the first or prime coat over old asphalt surfaces to prevent tar color "bleed through" and discoloration of the "White" color of the finish coating. It's smart roof maintenance practice to clean the roof a couple of times each year!
Tar and Gravel Surfaces - On any tar and gravel surface we recommend that ALL the gravel be removed in order that one has a sloped, clean, very smooth, firm and dry surface on which to apply a coating. If the gravel is not removed, then one will use many times more material to build a coating film, and risk the possibility that the coating could have voids and not form a satisfactory waterproofing membrane over the entire surface area. Therefore, SOMAY cannot recommend the application of any coating over any tar and gravel roof surface when the purpose of the coating is to build a waterproofing coating or membrane on top of the tar and gravel roof surface.
Other Use Restrictions - SOMAY "ROOF MASTIC" is NOT intended for use on: improperly prepared, infirm or structurally unsound surface; on tar and gravel roof surfaces; on wooden shake covered surfaces; below normal grade or ground level; on the inside of tanks or pools; where it will be subject to constant immersion or standing water for an extended period of time; where it will subjected to any acts of carelessness which might cause a puncture or rupture of the waterproofing membrane, such as pedestrian traffic, moving heavy furniture with rough feet, the installation of air conditioners or antennas through the roof, etc.