Nash titan t1 pro issue

This nash Titan t1 Pro is 20 months old. only used for 5 x 48-hour sessions. 3 sessions in 2023 and 2 sessions in 2025, I couldn't fish in 2024 due to health reasons. on my last session, it rained, and the bivvy leaked from pinholes and the seams. the backing on the metrial is cracking and failing, and pinholes are app all over, but mainly the front section. the bivvy has never been packed away wet, I away take care of my gear. I'm not the only one having this issue. I've seen several posts in forums and on Facebook of others having the same issue. if anyone has a solution or fix for this issue, please comment, Nash has recommended using Thompson brick seal, but I'm not sure about using it.