14 Best Rated Waterproof Sealant 2023

CURES FAST – One-part adhesive sealant requires no mixing, typically cures within 48 hours so you can get back on the water faster

USE WHAT THE PROS USE – Extremely strong adhesive sealant retains strength above or below waterline

BONDS PERMANENTLY – Ideal for sealing, bonding and attaching on the interiors of boats and RVs, or on exteriors below the waterline and where shielded from the sun

LONG LASTING FORMULA – Tough polyurethane polymer resists weathering and salt water

WON’T CRACK OR PEEL – Stays flexible, retaining strong bonds even during vibration, structural movement or shock

SEALS OUT WATER, AIR & MOISTURE

30 MINUTE WATER READY

INDOOR/OUTDOOR: All Weather

100% WATERPROOF

WON’T YELLOW, SHRINK OR CRACK

AVAILABLE IN CLEAR AND WHITE

GREAT FOR: Kitchen, Bath, Window, Door, Plumbing, Gutters, Auto, Marine and more.

SEALS OUT WATER, AIR & MOISTURE

30 MINUTE WATER READY

INDOOR/OUTDOOR: All Weather

100% WATERPROOF

WON’T YELLOW, SHRINK OR CRACK

AVAILABLE IN CLEAR AND WHITE

GREAT FOR: Kitchen, Bath, Window, Door, Plumbing, Gutters, Auto, Marine and more!**

PROTECTIVE FINISH FOR - Foundations, ICF's, Basements, Shower Liners, Deck and Fence Posts, Planter Boxes, Metal, Wood, Concrete and more

HIGHLY FLEXIBLE - Sealant final membrane has over 900% elongation in the sealing material preventing adhesion failure causing cracks and taring. Flat/Ponding Surface: 50 sq ft/G per coat

EASY TO APPLY - No mixing required! Apply by brush, roller or high quality piston paint sprayer. Container can be closed and left over material used later. No pot life or working time like 2 component products

ENVIRONMENTALLY FRIENDLY - Liquid Rubber Foundation Sealant is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus

FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions…. With Liquid Rubber Seam Tape or Liquid Rubber Geo-Textile where possible movement may occur

USE WHAT THE PROS USE – Extremely strong adhesive sealant retains strength above or below waterline

BONDS PERMANENTLY – Ideal for sealing, bonding and attaching on the interiors of boats and RVs, or on the exteriors below the waterline and where shielded from the sun

LONG LASTING FORMULA – Tough polyurethane polymer resists weathering and salt water

WON’T CRACK OR PEEL – Stays flexible, retaining strong bonds even during vibration, structural movement or shock

EASY TO APPLY – Adhesive sealant requires no mixing, cures completely in 5-7 days

Use for sealing or repairing door frames, windows, vents, toys, appliances, gaskets, weather-stripping, outside of fireplace doors, shoes and boots

Bonds ABS, glass, ceramic, porcelain, wood, aluminum, stainless steel, cultured marble, fiberglass, granite, vinyl tile, some rubbers and plastics

Aquarium safe

No cracking, peeling or shrinking

2. 7 oz.

SEALS OUT WATER, AIR & MOISTURE

30 MINUTE WATER READY

INDOOR/OUTDOOR: All Weather

100% WATERPROOF - MOLD & MILDEW RESISTANT

WON’T YELLOW, SHRINK OR CRACK

AVAILABLE IN CLEAR AND WHITE

GREAT FOR: Kitchen, Bath, Window, Door, Plumbing, Gutters, Auto, Marine and more!**

Professional Formula - This Black Silicone Adhesive Sealant Is A Sensor-safe, General Purpose Black RTV Sealant That Can Be Used Inside Or Outside For All Your Jobs

Do It All- Seal, Bond, Repair, Mend And Secure Glass, Metal, Plastics, Fabric, Vinyl, Weather Stripping, Vinyl Tops, And More With This Black RTV Silicone Sealant

Resist The Elements- Permatex Black Silicone Adhesive Sealant Is Waterproof And Flexible; Resists Water, Weather, And Vibration On All Your Applications

Multipurpose Formula- With A Temperature Range From -75°f To 450°f (-59°c To 232°c) Black RTV Silicone Can Be Used All Around And Can Be Used To Protect And Repair Electrical Wiring

Suggested Applications- Door Frames, Electrical Connections, Seams And Roofs, Vinyl Tops, Weather Stripping, Housings And Coverings, (not Recommended For Engine Gasket Applications)

PROTECTIVE FINISH FOR - Flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, concrete and more

PROTECTIVE FINISH FOR - Flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, concrete and more

HIGHLY FLEXIBLE & DURABLE - Final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product

COVERAGE - Vertical Surfaces - 1 gallon/30 sq ft (2.8 sq m). 3-4 heavy coats to achieve a 30 mil (0.76 mm) membrane. Flat/Ponding Surfaces - 1 gallon/15 sq ft (1.4 sq m). 4-5 heavy coats to achieve a 60-80 mil (1.5-2 mm) membrane

ENVIRONMENTALLY FRIENDLY - Liquid Rubber Waterproof Sealant/Coating is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus

FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions…. With Liquid Rubber Seam Tape or Liquid Rubber Geo-Textile where possible movement may occur

SEALS OUT WATER, AIR AND MOISTURE: Gorilla Waterproof Patch and Seal Spray is a flexible, rubberized coating that seals out water, air and moisture to stop and prevent leaks

CRYSTAL CLEAR: dries crystal clear and transparent creating cleaner, finished projects than similar products

EASY TO APPLY: brush, roll, trowel, dip or pour; Once applied, the self leveling formula smoothly covers small gaps and cracks ensuring a watertight seal

TEMPERATURE AND UV RESISTANT: When dried, Gorilla Waterproof Patch & Seal Liquid is temperature and UV resistant resulting in lasting repairs

USE ON: Roofs, Gutters, Skylights, Flashing, Chimneys*, PVC Pipe Joints, Windows, RVs, DIY Projects and More! Not for continuous submersion or below-waterline use.