Glazing Sealant / Adhesive

Adhesives and sealants have different functions. It would be classified as a sealant, and sealants used inside the weatherproofing system should have a VOC content of 250 g/L or less.

Our project Engineer Architect suggests that mortar/grout/thinset may fall under category "Porous material(except wood) substrate. John David chose ceramic tiles adhesive ,while Jaida said Architectural Sealant..... What's really the usual classification of grout and mortars acceptable by GBCI based on the past projects certified? Please advise....

Hi Benj, We have certified numerous projects with mortar and grout. There is no specific category as many people have pointed out in previous posts. We have used Ceramic Tile adhesive and Architectural Sealant successfully as the previous responders have indicated. If you look at the underlying standard, the porous material substrate category is used for "adhesives, adhesive bonding primers, or any other primer not regulated by the other categories". I would not go this route myself. However, the reality is most of the mortars, grouts and thinsets we see are largely cementitious and don't tend typically to have high VOCs anyway and will fit under most categories. Make sure you include it in a logical category. Explain in the Special Circumstances if you are uncomfortable with your choice. It shouldn't be a problem.