Check the listing for details. Mad Dog Dura Build Primer. Condition: New. Listed at 29.95 USD. Dura-Build is the best exterior primer to smooth uneven surfaces, bridges and fill cracks, and permanently resists peeling paint and cracking surfaces. Mad Dog quality at national brand pricing. Use on all surfaces for new and weathered projects. Dura-Build helps last up to 20 years.Mad Dog Dura-Build fills in and levels uneven surfaces for a more uniform look. High build formula fills and smooths rough and cracking areas. Applies at up to 30 mils wet, extends the life of top-coats for up to 20 years, and reduces prep time by up to 20%. Use on wood, metal, masonry and other substrates. Dura build Primer Video will open in a new window Using the mobile app? Copy this link into your browser: Features Dura-Build fills in and levels rough, damaged and uneven surfaces for a long lasting uniform lookHigh build formula overs 33% more surface than competitive productsOutstanding durabilityProvides a stable surface for long lasting top-coat lifePrevents paint from peeling, chipping and crackingCoverage: 150-200 square feet coverage per gallon