Is glidden gripper or cover stain the best primer?

Choosing between Glidden Gripper and Cover Stain as the best primer depends on your specific needs. Glidden Gripper is known for its Excellent adhesion and is ideal for challenging surfaces, while Cover Stain is an oil-based primer that Excels in stain blocking and provides a smooth finish. If you're dealing with stains or need to seal wood, Cover Stain may be the better option; for general purposes and multi-surface applications, Glidden Gripper is a strong contender. Ultimately, the best choice will depend on the surface and project requirements.