Will yhis work on the bottom of a black water tank?

We used it to repair a separated seam on the drinking water tank for our camper. I don’t see why it wouldn’t work for your application. It’s held for a solid year, with several uses.

My coolant tank isn't cracked but has that white spiderweb look on the top near the cap, would this cover that section, to prevent it from cracking?

I think so. My tank had a small hole and it was very brittle in the area with cracks and it has done just fine for several months now. Much cheaper than paying $100 bucks for OEM tank.

Will this work on rubber?

Does it say it works on rubber? If it does then yes otherwise buyer beware. Please read shut the product uses and descriptions before asking this type of question.

Which is the best sealent for stopping leakage in sintex water tank

I ended up using gorilla glue, it was easy to apply and leaves a clear watertight seal. Remove the tank, drain it, wash it well with soap and water, dry it well, apply gorilla glue to the cracks and let dry, then water test before you reinstall the tank. Easy, clean and works great, has lasted over two years since I repaired.

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🛠️ Fix it fast, drive safe—because your ride deserves the best!

MADE IN THE USA - Crafted with quality and durability you can trust, supporting local manufacturing excellence.
COMPACT LIGHTWEIGHT - At just 90.6g and pocket-sized, it’s the perfect on-the-go repair solution for busy professionals.
USER FRIENDLY GUIDANCE - Clear, easy-to-follow instructions with photos ensure a hassle-free DIY experience.
VERSATILE REPAIR POWER - Seamlessly fixes windshield washer reservoirs, radiator overflow, coolant, water, and waste tanks—except plastic fuel tanks.
WEATHER READY RELIABILITY - Boosts safety by increasing visibility during rain, snow, fog, and nighttime driving conditions.

The Permatex® Plastic Tank Repair Kit is a lightweight, universal-fit solution designed to repair various plastic tanks like windshield washer reservoirs and coolant tanks. Featuring easy-to-follow photo instructions and enhancing visibility in harsh weather, it’s a must-have for proactive vehicle maintenance. Made in the USA, this kit delivers reliable, professional-grade repairs without the need for assembly.

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Item Weight	3.2 Ounces
Fuel Type	Petrol
EU Spare Part Availability Duration	1 Years
Fit Type	Universal
OEM Part Number	PX09100
UPC	077349611556
Manufacturer	Permatex
Model	09100
Product Dimensions	3.18 x 9.86 x 20.02 cm; 90.72 g
Item model number	9100
Manufacturer Part Number	PX09100
Outer Material	plastic
Colour	No Color
Assembly Required	No
Country of Origin	USA
Item Weight	90.6 g

Permatex® Plastic Tank Repair Kit

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