30-day postage paid returns
        Free shipping special for you
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          • Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls
          1 / 14

          Flex Paste MAX, 12 lb Can, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls

          $36.00 USD
          Shipping fees will be calculated at checkout.

          • Free worldwide shipping

          • Free returns

          • Carbon neutral

          • Secure payments

          • NEW! STAY FRESH CONTAINER – Blocks out air and locks in freshness to extend the sealing power of Flex Paste, with no waste
          • COAT, SEAL & PROTECT - Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier
          • WORKS UNDERWATER - Can be applied underwater, and it even dries underwater
          • FILLS LARGE AREAS - Super thick rubber paste clings to the surface and instantly fills large gaps, cracks, and holes
          • FULLY PAINTABLE - Once fully cured, it can be painted any color. Helps prevent rust and corrosion, and it is UV resistant
          • EXCELLENT FOR – filling cracks and holes, foundation and concrete repairs, sealing out rodents and pests, bath and shower, indoor and outdoor projects, roof, RV, motorhome, auto, marine, lawn and garden projects, DIY, hobbies, and more
          • MADE IN THE USA
          UPC850010226880
          Number of Packs1
          Unit Count192 Ounce
          Number of Items1
          Included ComponentsHousehold Item
          Item Type NameFlex Seal Paste MAX 12 lb Tub (Black) FLEX SEAL - PFSMAXBLK01
          ManufacturerSwift Response, LLC
          ModelFLEX SEAL - PFSMAXBLK01 - BLACK
          Part NumberPFSMAXBLK01
          Item Weight12 pounds
          Item Dimensions7.75 x 6.75 x 6.75 inches
          Water Resistance LevelWaterproof
          Item FormPaste
          Compatible MaterialWood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes
          Style Name12 lb BLK
          ColorBlack
          Surface RecommendationTub
          Material TypeRubber
          MaterialRubber
          Style12 lb BLK
          New Stay Fresh Container

          Flex Paste

          Works indoors and outdoors.

          Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier.

          Flex Paste Clear

          Apply to almost any surface.

          Use on: Wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, PVC and so much more.

          Flex Paste

          Clings to wet and dry surfaces. Even underwater.

          No need to wait for surfaces to completely dry before sealing them. It even cures underwater.

          Flex Paste

          Can be spread, shaped, and formed.

          This thick rubberized paste is exceptional for all types of crafts, hobbies, and more.

          Flex Paste

          Won’t shrink, crack, or become brittle.

          Flex Paste stays completely flexible, making it perfect for all-season roof repairs and all types of DIY projects.

          Made in USA

          Made in the USA

          Flex Paste is proudly made in America, using globally sourced products.

          DIRECTIONS:

          Remove even layer

          Using putty knife, trowel or similar tool, remove an even layer from the top surface.

          Do not scoop

          Do not scoop deeply into the tub as this may create air pockets.

          Apply a generous amount

          Apply a generous amount to the surface using a smooth motion.

          Test after product has cured

          Always make sure all cracks & holes have been completely filled & cured before testing.

          Flex Paste
          Example title

          You may also like

          Recently viewed

          Service

          Fast and free delivery
          Lifetime customer support
          30 day refund guarantee

          Return policy | Privacy Policy | Shipping Policy | Terms of Service |
          © 2026 Twipik. All Rights Reserved.

          Cart

          loading