Quick weathering test for screening silicone sealants

Thirteen different silicone sealants were exposed on strain- cycling racks simulating movements in external building joints. Following the use of differential scanning calorimetry to confirm that the sealants were indeed silicones, it was found that a quick outdoor exposure screening test, described here, could eliminate unsatisfactory materials within two months.Treize produits d'\ue9tanch\ue9it\ue9 \ue0 base de silicone ont \ue9t\ue9 expos\ue9s sur un banc d'essai simulant les mouvements des joints ext\ue9rieurs d'un b\ue2timent. Apr\ue8s avoir utilis\ue9 la calorim\ue9trie \ue0 balayage diff\ue9rentiel pour d\ue9terminer que les produits d'\ue9tanch\ue9it\ue9 \ue9taient effectivement des silicones, on a d\ue9couvert que l'essai \ue9liminatoire d'exposition ext\ue9rieure de courte dur\ue9e d\ue9crit dans cet article, permettait d'\ue9liminer les mat\ue9riaux non satisfaisants dans un d\ue9lai de deux mois.Peer reviewed: YesNRC publication: Ye