A sticky question
Adhesives hold our world together - literally. Industrial products of all kinds require bonds of varying strength to perform their function, from the furniture in your living room to the parts that intricately connect and hold together the automobile in your driveway. Due to my numerous hobbies I have easily fifteen different varieties in my basement right now. Luckily in our industry, we do not need quite that many. So let's talk about the main two types of adhesive products that you can choose from to make walls and steps; solvent based or polyurethane based.
The first is solvent-based adhesive like our VOC compliant SRW. This style has been the longest in the market and is still highly used. It cures as the solvent evaporates, leaving the polymers. (Cons are toxic and flammable fumes in non-VOC compliant products.) The pros for this product are price and availability, an extremely long shelf life, and basic ease of use. There are a wide range of curing times which are affected by heat, humidity, and moisture. The product will also shrink due to the amount of evaporation during the curing process, which mostly isn't a factor in our industry.
The next type of adhesive is polyurethane-based, such as Brickstick. The curing process for this product uses air and moisture. Since there are no solvents, there is no shrinking or cracking while this product cures. It can also withstand higher temperatures like you would see in a fire pit or fireplace. Lastly, the speed at which this product cures is probably the most significant reason this type of adhesive is sought after. However, that speed can also be problematic if you need to move, shift, or rearrange something so plan accordingly. It is also harder to remove from hands or tools. The shelf life is under a year so pay attention to that when stocking up.
Both types of adhesives will perform well for most of your applications. They are both usable in rain or snow, so mother nature won't get in the way. Both are low-VOC compliant (volatile organic compound) so enclosed areas are no problem. Here at Christensen's we stock both types of adhesive, to have you covered in whichever choice you make. Ask one of our salesmen about the whats and whys so we can better help adhere to your needs and stick you with a great product.