HC-8305A/B is a two-component casting polyurethane gel system for moulding soft gel insoles and anti-slip pads. The cured gel is low-hardness, highly transparent and self-adhesive, with good tensile and elongation strength — ideal for cushioning, shock absorption and non-slip grip. Poured on a low-pressure casting or dispensing machine, it also makes cooling gel pads, seat cushions, gel pillows and shock-absorbing gel parts.
Low
hardness / soft gel
Clear
high transparency & adhesion
1.02–1.05
density g/cm³
Cast
low-pressure / dispensing
2-part
polyol + prepolymer
Key Features
Soft, low-hardness cushioning Gentle, conforming gel that absorbs pressure and shock underfoot.
High transparency Crystal-clear gel for premium, see-through insoles and pads.
Self-adhesive & non-slip Natural tack grips the shoe or surface for reliable anti-slip pads.
Good tensile & elongation Stretchy and tough for durable, tear-resistant gel parts.
Shock & vibration damping Absorbs impact — suited to insoles, seat pads and tool grips.
Tunable hardness Softness and feel adjusted by formulation. OEM/ODM supported.
Applications
Transparent Gel InsolesAnti-Slip Gel PadsGel Seat CushionsRaw Material (A/B Drums)
Also cast from HC-8305A/B: cooling gel pads, mouse-pad & wrist gel, transparent shock-absorbing gel for power tools, gel pillows and sanitary suction cups. A related low-odour medical positioning-pad gel grade (YJ-8301A/B) is also available on request.
Technical Specifications
Item
HC-8305A (polyol)
HC-8305B (prepolymer)
Appearance (25 °C)
Colourless transparent liquid
Colourless transparent liquid
Viscosity (cps, 25 °C)
1500 ± 500
5000 ± 1000
Density (g/cm³, 25 °C)
1.02 ± 0.05
1.05 ± 0.05
Packaging
20 kg / drum
20 kg / drum
Per HC-8305A/B TDS; hardness and feel tunable by formulation. Typical values for reference, not a binding specification.
Processing
Low-Pressure Casting Pour A/B on a low-pressure PU casting machine into insole and pad moulds.
Dispensing / Gel Machine Suitable for automated dispensing of gel pads and parts.
Two-Component System HC-8305A polyol + HC-8305B prepolymer; mix thoroughly before pouring.
Tunable Hardness Adjust formulation for softer or firmer gel feel.
Packaging, Storage & Handling
Packaging HC-8305A and HC-8305B each supplied in 20 kg drums. Bulk on request.
Storage Keep sealed in a cool, dry place away from moisture. Shake / mix each component before use, especially after storage.
Handling & Safety Avoid eye/skin contact; wear safety glasses. Wash skin with soap and water; flush eyes with water and seek medical attention. Full MSDS on request.
10+ years in PU raw materials Specialised blended-polyol & PU systems supplier serving industry worldwide.
Custom formulation Hardness, transparency and tack tuned to your gel part.
Equipment integration Casting / dispensing machines and process support as a complete solution.
Global export & fast reply Export to EU, Latin America, Asia and beyond — we respond within 24 hours.
From Sample to Bulk Order
1. Share your part Tell us the gel part, target hardness and clarity — we recommend a formulation.
2. Sample & validate Trial-cast samples; we fine-tune hardness, tack and transparency.
3. Scale to bulk Confirm the formula and order in bulk with flexible MOQ and tiered lead times.
Frequently Asked Questions
Is HC-8305A/B a finished gel or a raw material?It is a two-component raw-material system (polyol + prepolymer). Cast and cured, it forms soft transparent gel insoles, pads and parts.
How is it processed?On a low-pressure PU casting machine or a dispensing / gel machine; mix HC-8305A and HC-8305B and pour into the mould.
Can the hardness and clarity be adjusted?Yes. The gel is low-hardness and highly transparent by default; softness and feel are tunable by formulation.
What else can it make besides insoles and pads?Cooling gel pads, mouse-pad & wrist gel, transparent shock-absorbing gel for power tools, gel pillows and suction cups.
Need PU gel for insoles & anti-slip pads?
Get a tailored HC-8305A/B formulation, full TDS & MSDS, and a sample for casting validation.
✓ Soft, clear & self-adhesive✓ TDS · MSDS · COA✓ Reply within 24 h
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