BISCO® HT-6210 — Ultra-Soft Solid Silicone — Technical Overview & FAQs

Product Overview

BISCO® HT-6210 is an ultra-soft solid silicone rubber (10 Shore A) designed for applications that demand exceptional flexibility, gentle compression, and long-term sealing reliability.
This low-durometer formulation provides outstanding resilience and recovery while maintaining a secure seal under minimal load pressure. It’s engineered for sensitive assemblies, environmental gasketing, and precision cushioning in electronic, aerospace, and medical devices.

HT-6210’s unique softness allows it to conform easily to irregular or delicate surfaces while maintaining excellent resistance to heat, UV, ozone, and aging.

Applications

Soft environmental gaskets and low-pressure seals
Electronics, lighting, and enclosure gasketing requiring delicate compression
Vibration damping and cushioning in aerospace and instrumentation equipment
Medical, food-service, and clean-room compliant sealing applications
Custom die-cut, kiss-cut, or PSA-backed soft gasket materials

Key Properties

Shore A Hardness: 10 ± 5
Specific Gravity: 1.10 g/cc
Tensile Strength: ≈ 800 psi
Elongation at Break: ≥ 800 %
Compression Set (70 h @ 302 °F): ≤ 25 %
Temperature Range: –80 °F to 450 °F (–62 °C to 232 °C)
Weather, Ozone, and UV Resistance: Excellent
Fluid Resistance: Moderate; resists water and oils
Compliances: A-A-59588, AMS 3301–3305, FDA 21 CFR 177.2600, NSF 51

FAQs

What is BISCO HT-6210 used for?
HT-6210 is an ultra-soft, solid silicone rubber used for low-compression seals, cushioning pads, and delicate gaskets where minimal pressure and maximum flexibility are required.

What makes HT-6210 different from other silicones?
With a 10 Shore A durometer, it’s the softest in the BISCO HT-6000 series, allowing it to conform to fragile or uneven surfaces better than standard silicones.

Can HT-6210 handle extreme temperature changes?
Yes — it remains flexible and elastic from –80 °F to 450 °F, offering consistent performance across wide thermal ranges.

Is HT-6210 safe for food or medical contact?
Yes. It meets FDA 21 CFR 177.2600 and NSF 51 requirements for non-toxic, food-contact-safe silicone materials.

Can HT-6210 be custom-fabricated or adhesive-backed?
Absolutely. It’s available as sheets, rolls, or die-cut gaskets with optional silicone or acrylic PSA for peel-and-stick installation.

Request BISCO® HT-6210 samples, technical data, or precision-cut gasket solutions from H-O Products for your next low-compression sealing project - contact us.