How strong is this glue? Can it be used to reapir a crack in 1 galon water reservior?

I would think so, I used it on a conical fermenter for my beer brewing and its worked fine for a few years now. No major pressure on it, just 7 gallons of product.

Can it be applied to a jar to store food in?

I'm not sure, I can tell you its ratted Food Safe. I used it to seal a crack in a conical fermentor I use for home brewed beer and cider. worked fine and left no taste that I could tell.

(white) what is the texture of the surface after cured? smooth? gritty? matte? shiny? how can it be made as smooth as possible?

To make as smooth as possible: after you apply the stuff, spray some water with soap (detergent/shampoo works) and smooth it out with your fingers... this method works great for corners and joints where a bead is required.... will probably make a not so great job on a flat surface :-)

is it dishwasher safe?

The package says its temperature range is -62ºF to 350ºF. I don't know how hot a dishwasher gets, but it might be ok on the top shelf.

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🛠️ Seal smart, seal safe — the pro’s choice for food-grade fixes!

COMPACT CONVENIENT - 2.8 oz tube fits perfectly in your toolkit for on-the-go fixes.
CERTIFIED FOOD SAFETY - NSF & FDA approved for safe use in all food-related applications.
HEATPROOF PERFORMANCE - Withstands extreme temps up to 350°F for durable, reliable seals.
PRECISION APPLICATION - Screw nozzle design ensures mess-free, controlled adhesive flow.
ALL WEATHER DURABILITY - Resistant to moisture, ozone, vibration, and weather for long-lasting repairs.

Sil-Bond Food Grade NSF FDA RTV Silicone Sealant Adhesive is a 2.8 oz white silicone sealant designed for food-safe applications. It offers extreme temperature resistance up to 350°F, is NSF and FDA approved, and features a precision screw nozzle for controlled application. Built to withstand moisture, ozone, vibration, and weather, it ensures durable, reliable repairs in professional and home environments.

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Manufacturer	Silco Incorporated
Part number	43338-2287
Item Weight	0.28 g
Product Dimensions	15.24 x 3.81 x 3.81 cm; 0.28 g
Is Discontinued By Manufacturer	No
Size	2.8 FL ou
Color	white
Material	Silicone
Number Of Pieces	1
Specification met	Usda, Astm
Special Features	Extreme temperature resistance, moisture resistance, ozone, vibration resistance, and weather resistance
Specific Uses For Product	Repair
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	15.2 x 3.8 x 3.8 cm

Sil-Bond Food Grade NSF FDA RTV Silicone Sealant Adhesive, White, 2.8 oz, 1 43338-2287

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