10 bestWaterproof Sealerof July 2025
112M consumers helped this year.
1

Liquid Rubber RV Roof Sealant- Professional-Grade Solar Reflective Flexible Waterproof Membrane Coating for EPDM, TPO, Fiberglass & Aluminum Camper & Travel Trailers- 1 Gallon
Liquid Rubber

9.8
2

Gorilla Waterproof Patch & Seal Tape, Works Under Water, Indoor & Outdoor Use, Permanent Bond, Instantly Seals, Flexible, 4 in x 10 ft, Black, (Pack of 1) 4670002
Gorilla

9.6
3

Gorilla 100% Silicone Sealant Caulk, All Purpose, Waterproof, 2.8oz/82ml Squeeze Tube, Clear Transparent, (Pack of 1), 8190001
Gorilla

9.3
4

Flex Seal – Stop Leaks Fast! Rubberized Waterproof Coating Spray, Ideal for Roofs, Holes, Cracks, DIY Projects, Automotive Fixes, Indoor & Outdoor Repairs, and More – Clear, 14 oz. (397 g) – 2 Pack
Flex Seal

9.0
5

GE Advanced Silicone Caulk for Kitchen & Bathroom - 100% Waterproof Silicone Sealant, 5X Stronger Adhesion, Shrink & Crack Proof - 2.8 fl oz Tube, White, 1 Pack
GE

8.8
OtherUp to 38% off
6

Permatex 59203 Black RTV Silicone Adhesive Sealant 16BR, 80ml
Permatex

8.5
7

Liquid Rubber Color Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Medium Gray, 1 Gallon
Liquid Rubber

8.2
8

SIKA - Polyurethane-Based Sealant - Sikaflex Self-Levelling Sealant - Grey - Premium Grade - Seals Horizontal Movement Joints - 300 mL (10.1 US fl. oz.)
SIKA

7.9
9

Liquid Rubber Concrete Foundation and Basement Sealant - Indoor & Outdoor Waterproof Coating, Easy to Apply, Black, 1 Gallon
Liquid Rubber

7.6
10

Gorilla Waterproof Patch & Seal Spray, Flexible Rubberized Coating, Seals Out Water Air & Moisture, Stops & Prevents Leaks, Black, 16oz/453g, (Pack of 1), 104058
Gorilla

7.3

Best Reviews Guide Newsletter
Get exclusive articles, recommendations, shopping tips, and sales alerts
Sign up for our newsletter to receive weekly recommendations about seasonal and trendy products
Thank you for subscribing!
By submitting your email address you agree to our Terms and Conditions and Privacy Policy