I have a crack in my concrete pond. If I coat the pond with this product will it hurt fish? Do you recommend for ponds?

I used it in my pond and the fish are still going strong. Great product You may want to fix the crack as best as you can prior to coating with Rubberseal. Maybe try UGL water plug in the crack.

I am looking for a product to seal my 5K gallon concrete water tank, will this stick to old concrete? Will it leach out into the water/

Yes I will seal it. No water will get out. The tank will need to be cleaned (best way pressure wash it if possible) and dry. Minimum 40 mils and let it cure out for 72 hours

Will this be flexible enough to work with a folding kayak?

It has 1500% elongation. That means it will expand 15 times the thickness you put down before it breaks. It will recover 90 to 95%. I am not sure of your application exactly, but if you want to send some pictures we could guide you on the application.

What is the coverage area per gallon

It depends on the thickness. See spread rate chart on product info. Below 40 mils is damp proofing. Above 40 mils is waterproofing. All our testing is bases on 80 mils. Each coat is around 20 mils.

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1 Gal. Black Liquid Rubber 10005005

Product ID: 14235683

Details

Brand
Rubberseal
Item Weight
4.01 kg
Item dimensions L x W x H
8 x 8 x 10
Material
Rubber
Style
Industrial

⏳72+ hrs drying time for durable finish

💧Waterproof seal up to 60 mil thickness

🛠️128 fl oz liquid rubber

Description

🖤 Seal it, shield it, own it — waterproof like a pro!

ADHESION FRIENDLY - Compatible with silicone, Liquid Nails, and other adhesives for multi-material builds and repairs.
THICK DURABLE COATS - Apply up to 1/16 inch thickness for heavy-duty protection with easy brush or roller use.
VERSATILE APPLICATION - Perfect for vivariums, basements, gutters, and more—coats wood, rubber, and other surfaces seamlessly.
INDUSTRIAL GRADE WATERPROOFING - Create impenetrable, flexible seals that protect your projects from water damage.
PROFESSIONAL FINISH WITH DIY EASE - Achieve a sleek, solid black finish that blends into your design while offering long-lasting resilience.

Rubberseal 1 Gallon Black Liquid Rubber is a premium industrial-grade liquid coating designed for waterproofing and sealing. With 128 fluid ounces of solid black rubber, it forms thick, flexible, and durable layers up to 1/16 inch thick. Ideal for projects requiring water resistance—such as vivariums, basements, and gutters—this product bonds well with various materials and adhesives. Expect a drying time of 72+ hours for a tack-free, professional finish that protects and lasts.

Specifications

ASIN	B00F0U0IRA
Best Sellers Rank	#319,571 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #388 in Industrial Coatings
Brand Name	Rubberseal
Color	Solid Black
Compatible Material	Rubber
Customer Reviews	4.0 4.0 out of 5 stars (184)
Included Components	Tools
Item Dimensions	8 x 8 x 10 inches
Item Form	Liquid
Item Weight	4.01 kg
Manufacturer	Rubberseal
Material Type	Rubber
Model	FR-07
Number of Items	1
Part Number	FBA_HRD-PN-79043075
Style Name	Industrial
Surface Recommendation	Gutter
UPC	852920005005
Unit Count	128 Fluid Ounces
Water Resistance Level	Waterproof

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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