Rooftop Guide: Applying Adhesive to a Flat Roof


After decades of working in the roofing industry, we’ve invented and optimized the ideal system for applying adhesive to a flat roof. When it comes to designing solutions for adhesive and coating application, we believe simple is better. It would be easy to add controls, valves, and gauges, but as we listen to our customers we consistently hear them say, keep it simple. Roofing contractors are able to produce superior work more efficiently in less time. With increased productivity, contractors are seeing increased profitability. Meet the adhesive solution developed by roofing contractors for roofing contractors.

Selecting a SpreaderSelecting a Weighted Roller

Applying adhesive to a low-slope roof

All spreaders are gravity-fed and have disposable rollers. All parts are disposable or simple to replace. Better Spreaders apply adhesives directly from the can while Tank Spreaders apply any pourable material such as low VOC adhesives and coatings from the tank.

Better Spreaders and Rollers

The Better Spreader makes adhered projects more efficient and contractors more profitable. This proven, simply quick adhesive dispenser has been designed to save you time and money – in two widths!

Tank Spreaders and Rollers

If the roof is more than 5,000 square feet and has a slope of less than 4″ per lineal foot, then it may be helpful to utilze the Profile Tank Spreader.  The Profile Rollers that are on a Profile Tank Spreader are 14″ long and cover one rib.  Flat Rollers are also available for the 14″ Tank Spreader.  (Note: Switching to a flat roof may also require a new tank for the spreader.)

Replacement rollers, tanks, and parts for the Better Spreader & Tank Spreader

Tank Spreader Replacement Tanks

The Single 14”, Double 27” and Super 40” tanks are drilled with ¼” holes, 1” on center, placed consecutively across the tank.  The Profile Tank 14” is similar to the Single 14”Tank in that holes are ¼”-1” on center, but more holes are dilled in the center to allow more material to flow over the profile rib. The Trapezoid 14” Tank is drilled the same as the Profile Tank but the brackets are placed differently to accommodate a 7.5” diameter roller.

Additional replacement parts for for the Better Spreader & Tank Spreader

Rooftop Equipment offers replacement parts for nearly every part, but many of these pieces are currently not listed on our website. For specific replacement part needs, please contact us directly for a quote by phone at 800-222-6454 or by email at

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