Akepox 2010 - 450 Gram Tubes

I have an old white marble tombstone broken in half, I need a white adhesive that will do the job. What do you recommend.

Hi, sorry about the delay on responding to this question.

It depends on the quantity of product you need.
For fixing one stone the least expensive option is the Pratley Quickset White which comes in 2 small tubes (link below).
Pratley Quickset White 40 ML Tubes - https://atlaspreservation.com/collections/epoxy-knifegrade/products/pratley-quickset-white-40ml
Pratley Quickset White 500 ML Jars - https://atlaspreservation.com/collections/epoxy-knifegrade/products/pratley-quickset-white-glue-500-ml

The other option is to use a clear epoxy and you have the option to add pigment.
Akemi Akepox 5010 2.25 KG - https://atlaspreservation.com/collections/epoxy-knifegrade/products/akemi-akepox-5010-knifegrade-2-25-k
Akemi Akepox 5010 180 ML Single Mix - https://atlaspreservation.com/collections/epoxy-knifegrade/products/akemi-akepox-5010-single-mix-knife-grade-180ml

Akemi Epoxy Colorant Set - https://atlaspreservation.com/products/akemi-epoxy-colorant-assorted-8-box

I hope this helps, good luck with the project. 
Please let us know if you have anymore questions.

I have an old slate utility sink that leaks from the seams at the bottom. I'm looking for a product to seal the seams at the bottom. The hasn't been installed yet. Will this product do the job?

Pratley Standard Putty might be a better optional because it is waterproof and can more easily be applied in difficult areas.

We need to adhered pieces of Coral Stone of a small decorative pedestal located in Florida that is outdoors. Which akepoxy product do you recommend?

All the Akepox epoxies are designed for outdoor use. The only one that won't discolor and is designed to use with pigment is the 5010.
The main difference between the 2010, 2030, and 2040 is the thickness.

Akemi Akepox 2010: A great all purpose epoxy. This is considered to be a knife grade however, on the thinner end of the knife grade range. It can be pigmented with darker colors, but it will yellow in UV. Good in colder weather. It will tend to liquefy in very hot weather.. Good for joining fractured stones. About the thickness of mayonnaise at room temperature

Akemi Akepox 2030: Also a great all purpose epoxy. Thicker then the Akepox 2010. Better able to bridge gaps in eroded or uneven areas being joined. It will become difficult to mix when below 45f, but it will perform better it hot weather then the Akepox 2010. Ideal of joining monumental elements like headstones to bases in conjunction with a monument setting compound. Also excellent of joining fractured stones. About the thickness of honey at room temperature.
Akemi Akepox 2040: This is the thickest of the 3 basic knife grades in the Akepox line. Able to fill large voids and bridge larger gaps then the Akepox 2013. Nearly impossible to mix in low temperatures. Also it will be barely adhere to surfaces when in the lower ranges near freezing. The best option is very hot weather. Great for joining monumental elements like headstone to bases in moderate to very hot weather. About the thickness of a heavy peanut butter at room temperature.

Akemi Akepox 5010: The same texture as the Akepox 2010, however perfectly clear and UV stable. Considered the premier Akepox Epoxy due its ability to be pigmented and color stability when in direct sunlight. Best of pigment with Akemi Akepox pigment kit. Good in colder weather. It will tend to liquefy in very hot weather.. Good for joining fractured stones. Best if visible as it will not yellow. About the thickness of mayonnaise at room temperature.