15 May 2001
(6) Uncured FRS can be adversely affected by changes in weather conditions such as rain or
(7) Only structurally sound pavements are suited for a FRS.
(8) Proper mixture design and application are very important for obtaining a satisfactory job.
d. Material requirements.
(1) Coal-tar emulsion. The binder material used in a fuel-resistant sealer is a coal tar
emulsion. The coal tar emulsion is usually specified as having to meet the requirements of Federal
Specification R-P-00355E or ASTM D 5727.
(2) Aggregates. Aggregates shall be either natural or manufactured angular aggregate. The
aggregate shall be clean and free of organic and other objectionable material. The aggregate shall meet
the gradation requirements as given in table 4-5.
Fuel Resistant Sealer Minimum Application Rates and Corresponding Aggregate Gradations
Minimum Application Rate, L/m2 (gal/yd2)
2.36 mm (No. 8)
1.18 mm (No. 16)
600 Fm (No. 30)
300 Fm (No. 50)
150 Fm (No. 100)
(3) Water. Only potable water shall be used in a FRS mixture. The amount of water required
shall be determined from laboratory testing prior to construction. A small amount of additional water
may be required under very high temperature pavement conditions.
(4) Additives. Additives sometimes used in FRS's include various types of polymer and silicon
materials. These materials may be added to the FRS mixture in the field or added to the coal-tar
emulsion during the emulsifying process. The polymer materials most often used are latex combinations
of acrylonitrile and butadiene.
(1) General. The design of FRS mixtures has historically been based on the selection of
materials (sand, water, and additives) from an allowable range based on a per gallon of coal-tar