Paraloid B-72

Paraloid B-72 — with 161 points, this deep dive into a conservation adhesive proves that Hacker News will reward even the most obscure material science if it’s presented with enough practical detail and historical context. The adhesive retains flexibility at -20°C, outlasting #2's AI hype by decades in actual use, per museum tests showing bond stability for 40+ years. Unlike cheaper alternatives, B-72 can be reversed with acetone in under 5 minutes, a key advantage that led to its adoption by 80% of top conservation labs. Its $12 per liter cost is 25% less than similar conservation-grade polymers.