Longer Life

ACE XP Polymer Fiber  is a true achievement in asphalt additive technology to enhance performance.

To create ACE XP Polymer Fiber (ACE XP), Surface Tech blends para-aramid fibers and Sasobit wax to address the 2 major distresses affecting asphalt performance today; cracking and rutting. Doing so also dramatically improves the treated roads’ life expectancy. When ACE XP is mixed into asphalt, it disperses over 19 million para-aramid fibers throughout each ton of mix to provide 3-dimensional reinforcement that increases the asphalt’s resistance to reflective cracking, rutting, fatigue and increased life expectancy. And best of all, no specialty contractors are needed for installation. Contractors handle ACE XP reinforced asphalt the same way they handle standard asphalt. This underscores ACE XP’s technology in being easy to adopt.

See for yourself. Watch the video below.

How it Works

How does ACE XP Polymer Fiber make asphalt more durable?

Many fibers have been successfully used to reinforce asphalt, but it takes a special polymer fiber to successfully reinforce 350 degree asphalt. Para-aramid is a unique polymer fiber with 400,000 psi tensile strength and micro-roots that tenaciously anchor themselves in the bitumen of the asphalt. In the summertime when asphalt gets hot and wants to rut, the rooted aramid provides resistance to the “flow” of asphalt to mitigate rutting. In the wintertime when asphalt is cold and wants to shrink, para-aramid provides added tensile strength for resistance to cracking. The bottom line is that polymers fibers in asphalt now make sense because of para-aramid, and for relatively low cost, ACE XP makes a big performance improvement in asphalt.

Technology Behind Ace XP Polymer Fiber

ACE XP Polymer Fiber extends pavement service life by dramatically improving the dynamic modulus of the asphalt layer and increasing the asphalt’s resistance to cracking and rutting (distresses that may cause premature failure). To create ACE XP, high-strength man-made “aromatic polyamide” or Aramid Fibers are bundled and coated with Sasobit® wax to create an asphalt concrete additive that is simple to mix with any WMA or HMA in drum and batch asphalt operations. The 3-dimensional reinforcement throughout the asphalt layer increases the asphalt’s resistance to cracking, rutting, and fatigue while providing improved ESAL capacity. Any asphalt project can benefit from ACE XP including both newly constructed asphalt pavements as well as thin asphalt overlay projects over deteriorated asphalt or concrete pavements.

Drastically decreased rutting
Significant increase in strength
Improved crack resistance
Significant increase in fatigue life
Reduced thermal cracking
Individual coated Aramid clips provide superior control of the Aramid into the mix
Provides superior/thorough disbursement of Aramid into the mix
Completely dissipates in the mix at a flash temp of 230℉; no effect on Aramid once melted
Para-aramid (50% by weight)
Sasobit CM (50% by weight)
1.5” (38mm)
Wax Treated & Cut Fiber Clips
1.44 g/cm3
400,000 psi
932 F
170 F

Material Properties

Provide ACE XP Polymer Fiber (pre-treated, Sasobit CM wax coated, aramid fiber) conforming to the requirements adjacent. Design asphalt mix without aramid fiber and do not alter the final mix design for the addition of aramid fiber at the plant. The dosage rate may vary per project depending on the specification and needed performance enhancement, but in general a minimum of 3.6 oz. coated weight per ton of asphalt mix (of which 1.8 oz. is pure aramid) and not more than 9.0 oz. coated weight (4.5 oz. pure aramid) per ton of asphalt mix. Please note that ACE XP Polymer Fiber contains 50% pure aramid fiber and 50% Sasobit CM wax, by weight. This pretreated, Sasobit CM wax coated aramid fiber remains in the form of a fiber strand with over 12,000 individual fibers / bundle that is easily conveyed to the asphalt mixing drum. In the mixing drum, the Sasobit wax melts allowing the aramid fibers to disperse into the asphalt mix.

Use Less, Save More

A reduction in thickness is achievable; the amount depends on field circumstance.
An amount to render the ACE XP cost-neutral is a good recommendation; still leaving much of the benefits for longer life and rutting/cracking reduction in tact.
See your area representative for more exacting details.

Engineered for Performance


ACE XP Polymer Fiber provides extra performance for asphalt by increasing service life, saving costs, or a combination of both. Similar to certain fibers successfully used in concrete for decades, ACE XP Polymer Fiber is now used in asphalt to significantly increase performance of new asphalt pavements and overlays. ACE XP Polymer Fiber makes asphalt stronger than steel and adds strength to pavement in all directions.

MAPIL test results for Ideal CT and HWTT
Good, Better, Best Test

Frequently Asked Questions