AP-2100 Modified Liquid Rubber Mastic

Product Fast Facts
Weather Resistant
Great Adhesion to TPO & EPDM


United Asphalt‘s Armour Proof AP-2100 Modified Liquid Rubber Mastic is a single-component mastic, providing a waterproof, weather resistant membrane with excellent permeability and UV protection. Armour Proof AP-2100 Modified Liquid Rubber Mastic offers good elongation tensile strength properties, resisting lateral movement and allowing for expansion and contraction. This mastic is used for many different applications, including seams, fasteners, gutters, vent pipe penetrations, curbs and expansion joints.

Application Information
Required PSI Spray Rate Gal/Min Coverage Rate Gal/100Sq.Ft. Tip Size
Brush Grade N/A N/A N/A


Apply AP-2100 by brush or trowel. Embed AP-8100 Series Polyester reinforcement into the wet product and smooth out free of all wrinkles and fishmouths. Roof coating may be applied after one-two hours of application.

Suitable Roof Substrates Use as part of a System
Metal BUR Modified EPDM TPO PVC Concrete Masonry Stucco EIFS

Coverage and Drying Time

Apply AP-2100 by brush or trowel at a rate of 80 linear feet per gallon, according to the substrate and condition. Apply in two applications when embedding fabric reinforcement. Dry time is 1-6 hours. Cure time is 48 hours.

Preparation of Substrate

Surface must be pressure washed clean, free of all loose particles, dirt, debris and other contaminants that could inhibit adhesion. Refer to the Armour Proof Coatings Specification for detailed instructions on how to prepare the specific substrate.

Limitations and Precautions

AP-2100 contains VM&P Naphtha and Xylene. KEEP AWAY FROM HEAT, OPEN FLAMES OR SPARKS. USE ONLY IN WELL VENTILATED AREAS WITH PROPER PROTECTIVE EQUIPMENT. Approved (MESA/NIOSH) chemical respirator and protective clothing must be worn by applicator and other personnel in the vicinity of the application. Provide mechanical exhaust ventilation in enclosed areas. Positive pressure fresh air hose masks are required for interior applications.

Available Color for AP-2100 Modified Liquid Rubber Mastic