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Mixing of Butyl Liquid Rubber

EPDM Production You will need an electric drill and a 3/8 inch nap roller for manual application. Mix for approximately three minutes. Chalk off your roof into 20X10 ft areas. When you are done “filling” that area you should have completely used your four-gallon pail.

butyl liquid rubber rvroofmagic


Butyl Liquid Rubber can be applied by brush, spray or roller. Best results can be obtained with airless spray equipment. See Inland Application Bulletins for additional information. Recommended Spray Equipment = Airless
Tip size.......................................... 025”
Fluid Pressure (PSI)..................... 3000
Fluid hose size.............................. 3/8" - 1/2"

Physical Makeup

Butyl Liquid Rubber is similar to traditional EPDM makeup. The most crucial qualities include:

  • A high resistance to water, ozone and ultraviolet, and overall superior anti-aging characteristics
  • Has a built-in mildewcide to deter mold and mildew growth.
  • Our "White" is an Energy Star qualified product. A temperature tolerance that ranges from -40° to 250° Fahrenheit.
  • It is both alkali and acid resistant.
  • Withstands ponding water 365 days a year.

What is the Spread Rate?

The ideal thickness is 20 mil. of dry film, which can be spread to 42 square feet per gallon onto a smooth area. When assuming a 45 square foot gallon, the specs are: roof liquid mixing

  • 8 pounds per mixed gallon
  • 680 psi tensile
  • 62° Fahrenheit brittle point
  • 180-200% elongation

What is the Cure Rate?

The quickness of curing depends wholly on temperature and oxygen availability. Oxygen is required to activate the catalyst. Keep in mind that temperatures vary drastically in some regions, and it may take several weeks for a full cure to take place if Butyl Liquid Rubber is applied during a cool period. However, even in a non-cured state, it will withstand water and rainfall.

Pricing and Ordering
Technical Properties
Coverage Rate 80-100 sf/gal
Flashpoint 101°Fahrenheit
Weight (lb./gal.) 8.5
Solids (% by Weight) 50.0±1%
Viscosity @ 78 2900 cps.
Drying Time 2-4 hours
Elongation ASTM-D-412 500%
Tensile Strength ASTM-D-412 1520 PSI
Permeance (10 mils) ASTM-E-96 0.166 perms
Fungi Resistance ASTM G 21 0 (Pass)
Water Swell ASTM D 471 0%
Weathering ASTM 4798 Pass
Low Temp. Flex ASTM D 522 Pass
Wind Driven Rain TT-C-555B Pass
Metal Pass
SBS Mod. Bit. Pass
APP Mod. Bit. Pass
Smooth BUR Pass
TPO Pass
Hypalon Pass
SPUF (Foam) Pass

Failure to follow the directions and/or proper preparation may result in poor product performance.

  • Existing MOISTURE on/in substrate prior to coating application
  • Substrate insufficiently cleaned.
  • Coating unable to bond to substrate.
  • Improper/Inconsistent coating mil thickness.
  • Leak area not identified and sealed.
  • Malfunctioning spray equipment.
  • Product contamination on job site.

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