Product Overview
BISCO® HT-1260 — Solid Silicone (Shore A 60) — Technical Overview & FAQs
Product Overview
BISCO® HT-1260 is a firm-grade solid silicone designed for high clamp-load sealing, vibration control, and thermal insulation. It maintains elasticity after long-term exposure to heat and fluids and is compliant with multiple aerospace and FDA standards.
Applications
Heavy-duty flanged gaskets and covers
Vibration isolation mounts in industrial systems
Aerospace, rail, and defense environmental seals
High-temperature enclosures and housings
Key Properties
Specific Gravity: 1.23 g/cc
Hardness: 60 ±5 Shore A
Compression Set (70 hrs @ 302°F, 25%): ≤25%
Tensile Strength: 1010 psi
Elongation: ≥150%
Heat Aging (70 hrs @ 437°F): Hardness ±10 pts; Tensile -20%; Elongation -40%
Oil Immersion (70 hrs @ 302°F): Volume +5%; Tensile -10%; Elongation -15%
Compliances: A-A-59588, AMS 3301–3305, FDA 21 CFR 177.2600, NSF 51
FAQs
Why choose 60A hardness?
HT-1260 offers excellent extrusion resistance and stability under higher mechanical loads.
What temperature range does HT-1260 handle?
It performs from -80°F to 450°F continuous, maintaining flexibility and sealing integrity.
Is it suitable for oil exposure?
Yes — it resists most fluids and shows minimal property change after oil immersion testing.
Can HT-1260 be supplied with adhesive?
Yes — custom laminations with silicone PSA are available for easy assembly.
Is HT-1260 compliant with aerospace standards?
Yes — it meets AMS 3301–3305 and A-A-59588 specifications.
Order BISCO® HT-1260 sheets, gaskets, or adhesive-backed rolls from H-O Products - contact us.