FAQs
Quick Facts
Product Differences
HP3 & HP4 serve distinct applications (interior, exterior, hybrid polymer).
Paintability
HP3 ❌ Not paintable
HP4 ✅ Paintable within 1 hr (test first)
ASTM/AAMA Standards
HP3 ASTM C920 Class 50.
HP4 ASTM C920 Class 25 and also AAMA 713-24 & EIFS tested.
Color Offering
HP3: White & Clear
HP4: Core-4 + Clear soft-launch; 200+ color library planned for 2026.
Low VOC/LEED
All HP-series meet EPA Method 24, CARB, and qualify for LEED® credits.
Exterior Use
HP3 (100% Silicone) & HP4 (Hybrid Polymer) for outdoor applications.
VOC & Shelf Life
HP3 <30 (12 mo), HP4 <50 (24 mo).
Origin
Formulated & produced in the U.S.A.; HQ in Mentor, Ohio.