Single-Component Butyl Provides a Permanent Seal Without Hardening

The butyl sealant can be used in a variety of metal roof applications where a low modulus sealant is desired.

The butyl sealant can be used in a variety of metal roof applications where a low modulus sealant is desired.

R.M. Lucas Co. has added a single-component, non-skinning butyl rubber sealant to its product line. Lucas #8660 provides adhesion and a permanent seal between concealed end laps, metal roof panels, standing-seam roof panels, ridge caps, wall panels and other applications where a non-hardening weather seal is desired. This product is also ideal for use with OEM and shop-assembled metal details.

According to the manufacturer, Lucas #8660 creates a non-hardening, weathertight seal. Designed as a non-skinning, non-sag sealant, the product exhibits high moisture resistance, with an exceptional ability to absorb sound and movement. Lucas #8660 comes in a neutral color, guns easily in cold or hot weather, and is packaged in 10-ounce fiber cartridges, 12 per case.

“Lucas #8660 won’t stain substrates and exhibits primerless adhesion to most roofing and building materials, including Kynar,” says Jason Morris, technical sales representative for Lucas. “The product is easy to gun and tool, even in cold weather, and is also self-healing.”

The butyl sealant can be used in a variety of metal roof applications where a low modulus sealant is desired, including metal roof panels, ribs, standing seams, and ridge cap flashing, as well as metal wall panels. Lucas #8660 is also recommended for OEM trailer and RV application, installation of walk-in coolers and freezers, and as a vapor barrier sealant. In addition, Lucas #8660 can be used as a sound-deadening sealant in installation of acoustical ceilings as well as both gypsum and metal wall panels. It is not designed for use as a single-ply roofing adhesive or lap adhesive.

When applying the sealant, the surface to be sealed must be dry and free of dirt or loose corrosion particles. A primer is not needed. Simply apply the sealant to the area as desired. Tooling is not normally necessary. The product can be cleaned with Lucas #125 Safe Solve. It also has a long shelf life, remaining active two years from the date of manufacture.

“We feel that this will be an excellent addition to our product line whether you are restoring, renovating or maintaining building structures,” states Morris.

Photo: McElroy Metal

Roof Coating Reduces Energy and Maintenance Costs

Crystal roof coating helps reduce energy costs.

Crystal roof coating helps reduce energy costs.

Using white colored roofs is a way to help reduce heat gain into a building or home in the southern climates where it stays hot most of the time. Just as wearing white or light colored clothes can help you stay cooler on a sunny day, a white roof can help keep a building cooler and lower the load on the air conditioning unit, reducing cooling costs.

Using the cool roof calculator on Oak Ridge National Laboratory’s website, it shows that if you live in Miami, Florida a white “cool” roof can save you approximately 0.185 USD per square foot per year as compared to a black roof. That’s roughly $647.50 per year for a 3500-square-foot home or $9,250 per year for a 50,000-square-foot office building or warehouse.

But what happens when a white roof turns grey?

When doing energy saving calculations, one of the overlooked errors is not factoring in the loss of insulating performance when white roofs get dirty or moldy. When that happens, the “cool roof” impact is less effective because the roof has gone from a reflective white to a grey or green.

For concrete roof tiles, especially, another factor that impacts energy efficiency is moisture. When a roof is wet, it conducts more heat than when it’s dry, making it less energy efficient.  

That’s why Crystal clear insulating and mold resistant roof coating benefits all types of roofs, including white roofs. It not only has its own insulating benefit (in all seasons and climates), it also helps the roof stay clean and resists the growth of mold. Another benefit it provides is a moisture resistant surface, so rain beads up and rolls off (taking dirt along with it) rather than soaking in.

If you tally the stay clean/maintenance benefits (not the energy saving ones), you can estimate saving approximately 25 cents per square feet to have a roof power washed. For a 5,000-square-foot roof that is $1250 per washing, which is usually done every one to two years by most. Product for that same amount of roof, would be approximately $3,000, so with incorporating maintenance savings, payback would be approximately 2.4 years, and your total maintenance savings over the 10-year warranty period would be approximately $12,500 if you previously had to clean the roof each year.

A School Used Crystal Roof Coating to Keep their White Roof Clean & Efficient

A Florida school had a costly issue, their white metal roof grew mold and collected dirt, meaning not only constant maintenance costs to clean it, but also a loss of energy efficiency. They looked to Crystal roof coating to solve the issue and ran a 60-day trial to see how it would help them.

Crystal roof coating applied to a section of the school roof remained clean.

Crystal roof coating applied to a section of the school roof remained clean.

The roof was cleaned and a section of the roof was painted with a coat of white paint and then over-coated with two coats of Crystal clear insulating and mold and UV resistant roof coating.

The photo above was taken 60-days after application. The spots where Crystal was applied stayed clean and white, while the unprotected areas became dingy and less energy efficient once again.

Additionally, the coating provided thermal insulation to lower cooling costs, even when the sun wasn’t shining.

Contact INI Worldwide for a quote for either product only or product and application.