General Questions


How do I choose the right Andersons Cob product?
Choosing the right product is all about your particular application. Our applications page is a good place to start.


What is your manufacturing process?
For more information on our manufacturing process, click here to download a brochure.


Are Andersons Cob Products safe?
Yes. Our products are all-natural, environmentally-friendly products made from corncobs, and are a renewable biomass resource.


Do Andersons Cob Products produce a lot of dust?
Our products are virtually dust-free and are very resistant to attrition or breakdown on use.


Do Andersons Cob Products contain any silica?
No. Our products are silica-free. In fact, our products all carry the USDA bio-preferred label.


Do Andersons Cob Products products require special storage?
No, but they should be stored in a clean dry place, as excessive moisture could affect performance.


Are Andersons Cob Products likely to ignite?
No. Our products are non-sparking, but will burn when exposed to flame or very high temperatures.


Blasting and Restoration Questions


How much Grit-O’Cobs product will I need for blast cleaning?
The volume needed will depend on the specific application, but in general consumption rates are about 350 lbs/hour with a 1/4″ nozzle and up to 650 lbs/hour with a 3/8″ nozzle for blast cleaning. Blast cleaning of log homes can require usage of ½ pound to 1 pound per square foot.


Are Grit-O’Cobs products more expensive than others for blasting applications?
Grit-O’Cobs is economical, providing more cubic feet per pound of material. No organic solvents, masking or steam washing required.


Will Grit-O’Cobs damage the surface of my historic building or log home while blasting?
No. Grit-O’Cobs has proven to be the finest abrasive possible in terms of removing old finishes without gouging the wood. What used to take weeks can usually be accomplished in less than a day.


Can I use my sandblaster with Grit-O’Cobs products?
Standard sandblasting equipment can be used, including pressure pots, gravity pots and cabinets.


Can I use a mixture of sand, glass beads, or aluminum oxide & Grit-O’Cobs when I sandblast?
Yes, Grit-O’Cobs is often used to extend the life of a more expensive abrasive or provide a specific mixture for a special application.


Will I need to mask off glass areas using Grit-O’Cobs for blast cleaning?
With a Mohs hardness of about 4.5, Grit-O’Cobs should not harm or etch glass, so no masking of glass areas is necessarily required. Caution: We recommend testing a small area to determine if masking may be required.


If I use Grit-O’Cobs products to blast-clean my deck, what should I do with the expended material?
Since Grit-O’Cobs is 100% biodegradable, you don’t have to do anything with it. If you plan to paint or re-seal your deck immediately after cleaning, you may want to use an air hose or blower to remove any excess material.



For additional questions, feel free to contact us today!

The Andersons has been milling corncob products since 1957. Our satisfied customers around the world often help contribute to the growing list of applications and benefits. Here are the answers to some of the most frequently asked questions, which may be helpful to you as you work with Grit-o’Cobs, Dri-Zorb and Stabl-Zorb.

If you don’t see your question(s) answered here, don’t hesitate to contact us – our customer service team is here to help!