Can I use it to repair cracks inside fireplace? The front piece behind the screen has a couple of cracks in the block. Can this be used to repair it?

I did not use this product in that way, but, from my experience with the product, I would not hesitate to try it. Of course it would only work for small cracks and it might be tricky to be sure you get an airtight seal if that's what you need. For the record, I used it to repair a broken "bakelite" handle on a stovetop pot and it has held for a long time through many uses. Good luck.

Can I use just a little bit and store the rest>? How long will it keep if stored after being opened?

This a two part epoxy, so when you take the roll out of the tube it comes in there will usually be aluminum caps at the ends. Leave one alone and peel the other one of the roll and save it. You will use it to seal off the open end. I like to cut my rolls with a very sharp razor. The act of cutting a piece off for use will squish the roll where you are cutting it, and, of course, this will activate the epoxy were it comes in contact with the hardener. Just slap the aluminum end back on and store it a cool dry place. I've held on to mine for over two years now and its is a little harder to mix now. But it still works.

What color does it dry? Dark brown? Medium brown? Tan?

Mine dried a lighter brown than it looked in the package. The inner core is lighter, so when the putty is mixed it dries to a light/medium brown. It's pretty easy to work with and sticks well to metal.

025543 Pc Fahrenheit High Temperature Mouldable Putty Epoxy 1 Ounce

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Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Specifications

ASIN	B00176MFFO
Best Sellers Rank	#69,942 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #98 in Tile Epoxy Adhesives
Brand	PC Products
Brand Name	PC Products
Color	Brown
Compatible Material	Automotive Parts, Grills, Radiators, Steam Pipes
Container Type	Stick
Customer Reviews	4.2 out of 5 stars 167 Reviews
Full Cure Time	60 minutes
Global Trade Identification Number	00054983025543, 00549830255438
Included Components	(1) PC-Fahrenheit
Item Form	Stick
Item Package Quantity	1
Item Type Name	PC Products PC-Fahrenheit Hi-Temp 1 oz Epoxy Adhesive, Brown (25543)
Item Weight	1.6 ounces
Manufacturer	Protective Coating Co.
Material	Epoxy Resin
Material Type	Epoxy Resin
Model	25543
Number of Pieces	1
Other Special Features of the Product	High-temperature resistance and versatility in high-temperature repairs
Part Number	25543
Special Feature	High-temperature resistance and versatility in high-temperature repairs
Specific Uses For Product	Repair, Steam Pipes, Radiators, Grills, Automotive Parts, High Temperature
Tensile Strength	700 psi
UPC	054983025543 549830255438
Unit Count	1 Count
Viscosity Level	Medium to High
Volume	1 fluid ounces
Warranty Description	Warranty
Water Resistance Level	Not Water Resistant

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