There is a vast difference between installing indoors under controlled conditions and outdoors under variable weather conditions. Because “installation time is money”, installers, contractors and others quickly learn that there is much more to selecting an outdoor adhesive than just its low price and/or high strength. In fact, using an adhesive based on those criteria alone will probably be both costly and disastrous. Many either do not know or ignore the fact that outdoor installations under widely variable and sometimes adverse weather conditions, plus long term weathering, are a “different world”. Furthermore, from an economic standpoint, installers cannot wait for good weather before they can use a “fair weather only” adhesive. Delays due to weather could be hours and/or days and/ or weeks. An important factor that is not considered when selecting an outdoor adhesive is what its strength and durability will be after weathering and not its initial strength. Some adhesives start off with high strength, and then deteriorate from both weathering and/or aging. Hence, to avoid adhesive “time bombs,” long term weathering tests under different world-wide outdoor conditions are important. Probably the most important installation property not realized by outdoor adhesive amateurs is the adhesive’s “green strength”* (grab, tackiness, grip, etc.) before cure. Installing with high green strength adhesives results in faster, more profitable and higher quality installations. Using oily/slippery adhesives (no green strength) is the opposite. Many good high strength adhesives after cure (like epoxies, high isocyanate content urethanes, silicone/silanes) are “oily”, slippery and have little or no green strength, grab or gripping properties until after they are cured. Hence, because of little or no green strength, costly outdoor installation problems and delays can result by using these otherwise good adhesives. During installation the turf can expand, contract or otherwise move due to the surface temperature changes from passing clouds on sunny days; to wind lifting the turf like a sail; to seams creeping open before the adhesive sets; to turf shrinking from cooling due to unexpected rain on a hot day; etc. Remember, for good, faster and more profitable installations it’s the adhesive’s high green strength before cure (and not the adhesive’s properties after cure) that counts. In summary, three extremely important adhesive properties for a successful and profitable outdoor installation are: the adhesive handling properties in variable and sometime adverse weather, its high green strength (grab) during installation and its durability after outdoor weathering.