Can Flex Paste Be Used on Walls?
Flex Paste® isn’t just for floors, foundations, or plumbing fixes—it can also be used on walls. From sealing cracks to patching holes, Flex Paste is a reliable option for both interior and exterior wall repairs.
Flex Paste on Walls
This thick, rubberized paste adheres to a wide variety of surfaces—including drywall, plaster, concrete, brick, and wood. Once applied, it forms a strong, waterproof seal that helps protect against moisture, air leaks, and future damage.
It’s especially useful for:
· Filling holes or cracks in drywall or masonry
· Sealing gaps around windows or vents
· Repairing wall damage in basements or garages
· Waterproofing problem areas on exterior walls
Interior vs. Exterior Use
· Indoors: Flex Paste can be used to patch drywall, plaster, or wood paneling, especially in moisture-prone areas like bathrooms, laundry rooms, or basements.
· Outdoors: It’s great for sealing cracks in stucco, brick, or exterior concrete walls to prevent water from getting in and causing long-term damage.
Application Tips for Walls
For best results:
· Start with a clean surface
· Use a putty knife or similar tool to apply and smooth the product
· Shape it as needed within 10 minutes of applying—Flex Paste starts to skin over quickly
· Allow 24–48 hours to fully cure, depending on temperature and humidity
Flexpert Tip: Flex Paste cannot be sanded. Instead, we recommend using a putty knife or similar tool to smooth the surface of the paste to your desired finish. Once cured, Flex Paste can be painted over, making it easy to blend into your wall repair.
If you need to patch, fill, or waterproof, Flex Paste delivers a strong, flexible hold you can count on. Want to see it in action? Visit our Flex Paste How-To Guide for step-by-step instructions and pro application tips.
