We do not recommend that our coating be applied to an asphalt shingled roof, because shingles sometimes move, shift and curl a bit. If this happens the coating could get puntured and this in turn would allow water to enter.
Possibly. Our coatings are self priming on many surfaces, however there are some roof types that would require a primer before the coating is applied. In this regard, you would first need to know what type of roof you have to make sure our coating is compatible. Our Eterna-Seal products have been proven highly effective over Metal, Concrete, Urethane Foam and a variety of non-Plasticized membranes such as EPDM & Hypalon.
All protrusions (air conditioners, vents, ect.) on the roof should be checked and if not working, replaced. All fasteners should be checked. Stripped fasteners or badly rusted fasteners should be replaced with the next largest size or a lap screws. All seams that have a gap more than 1/8″ wide should be secured with lap screws. All rusty areas should be treated with RRC 600 (Rust Remover & Conditioner). A garden sprayer works very well for application. RRC is clear and biodegradable. All roofs should be power washed. Water is fine in most cases. A detergent should be used if roof is greasy or oily.
Fastener Suppliers are located nationwide. Choose one that has the best prices and the best service.
Gas operated units with a 3000-3500 p.s.i. rating are recommended. 10,000 – 20,000 sq. ft. can be power washed in a day. (Depending on condition of roof). A rotating power blaster tip is essential.
1 gallon of #7141 Super Seam Sealer or #7165 Seam Sealer Brush Grade will cover all seams and fasteners on Approx. 200 sq. ft. or 2 roofing squares. #7141 & #7165 Seam Sealer can be brushed or sprayed. #7174 Flashing Cement should be used in conjunction with RH-53 polyester membrane wherever a gap is more than 1/8″ wide and can’t be tightened down with lap screws; Wherever protrusions tie into a roof; and whenever a roof ties into another building.
When applying thermoplastic rubber to roof surfaces, a clean and dry condition is required. For best results, do not apply coatings until you are 5 degrees above the dew point.
Field coatings can begin 24-48 hours after seams and fasteners have been prepared with Seam Sealer or when dry to touch. Coatings can be brushed, rolled or sprayed, the best results being sprayed. It is still a good idea to roll the outside edge about 12-18 inches in if possible, to avoid over-spraying sidewalls etc. Wind is a factor, but nowhere near the factor as lighter coatings such as paints etc. Applications should always be done in two coats to avoid pinholing or mudcracking, and to ensure complete and thorough coverage. Follow guide specifications for reliable results, or call Truco personnel to assit in offering a customized specification. Drying time varies with weather conditions. On a warm sunny day, you can usually apply the second coat the next day. The first coat should not be tacky however, so the longer you wait the better.
When coating a roof that has been previously coated with aluminum or asphalt, there may be a bleed thru on the first coat of Truco’s liquid rubber coatings. Allow 2 weeks between first and second coat and put a test patch on to check for bleed thru before applying second coat.
Most of the contractors installing elastomeric acrylics, thermoplastic rubber and high silicone coatings will use airless spray equipment such as the Graco 833 Roof Rig. Smaller pumps may be suitable for spraying roof coatings short distances in warm weather. With high solids silicone, spray application can be rather demanding. A larger Graco 933 is typically associated with those materials. It is also possible to brush apply repairs and to use rollers to apply coatings on small projects. In most cases, we will be able to recommend brands or specific vendors that can meet your needs.
There are numerous formulation types within the roof coating arena. Most roof coatings are one of the following types:
- Elastomeric acrylic
- Thermoplastic rubber
- Asphalts, including aluminized asphalt
In most cases, we favor the use of thermoplastic rubber coatings but existing conditions on the roof and the goals/expectations of the owner will ultimately drive our product recommendations. There is no one, best coating for all roofs and situations. Fortunately, Truco has experience manufacturing all of the major product categories. When deciding on the coating that best meets your needs, we would typically recommend that decision makers focus on the physical properties of the coating material, along with the cost and sustainability of the installed system.
As a manufacturer, Truco is able to remain cost effective on a price per gallon basis with all other quality roofing materials. We do recommend a disciplined approach that is based on long term performance. Therefore, the coverage rates and specifications that we suggest may result in costs that are higher than vendors taking a shorter term mentality to the work. We recommend that prospects review older installations when judging the true cost associated with our materials as our aim is to design durable, long term solutions to your roof problems.