The WOOSTER® Primer™ paint roller cover provides maximum hiding power with all latex and oil-based primers, including stain killing, bonding, or vapor blocking. The shed-resistant tan fabric cover provides proper coverage for a smooth base coat. Use on drywall, plaster, and smooth wood surfaces. Polypropylene core resists water, solvents, and cracking. Note: Use with paint roller frames, Nos. 3UW50, 36T210, and 36T233 (sold separately), and paint trays, Nos. 3UW75, 14A047, and 36T231 (sold separately).