Uncured Silicone Sheet: High-Performance Uncured Sheeting & Compounds
Pre-Formed Roll Stock Ready for Custom Molding and Laminating
ElastaPro is a trusted North American manufacturer of uncured silicone sheet, engineered for custom molders, laminators, fabricators, and advanced manufacturing operations.
Made in the USA, our uncured solid silicone sheeting provides exceptional green strength, consistent gauge control, and precise gel times, enabling seamless integration into press molding, autoclave curing, mandrels, and composite bonding processes.
Supplied in continuous rolls or cut plies, ElastaPro uncured silicone sheet is formulated to bond aggressively to metals, fabrics, and structural substrates during customer vulcanization.
Technical Specifications & Supply Options
ElastaPro uncured silicone compound sheeting is designed to maximize process yield and maintain material stability prior to cure.
- Durometers (Post-Cure Range): 10 to 90 Shore A
- Thickness Range: 0.005″ to 0.675″ (0.13 mm to 17.145 mm)
- Standard Widths: 36″ (914 mm) and 48″ (1219 mm)
- Custom Roll Widths: Up to 67″ (1701.8 mm)
- Packaging & Release Liners: Supplied with smooth or embossed protective poly release liners to ensure easy release and prevent self-adhesion during storage and handling.
Fabric-Reinforced & Unreinforced Constructions
Uncured silicone sheet can be produced unreinforced or pre-calendered directly onto structural fabrics to create vulcanized flexible bladders, diaphragms, and reinforced composites:
- Fiberglass
- Kevlar®
- Nomex® / Nextel®
- Dacron® Polyester
- Nylon
- Conductive and heat-resistant technical fabrics
Custom Formulations & Industry Grades
ElastaPro formulates uncured silicone compound sheeting to match your exact vulcanization equipment, cure cycles, and performance targets:
- General Purpose & Commercial Compounds: Balanced cure kinetics for standard compression and transfer molding.
- High-Strength Uncured Grades: Engineered for high dynamic shear and tear resistance post-vulcanization.
- Extreme Temperature Formulations: High-heat and extreme-low-temperature base chemistries (-117°C to +300°C capability post-cure).
- FDA & Medical Grade Base Compounds: Uncured materials formulated to comply with FDA 21 CFR 177.2600, 3-A, and USP Class VI requirements post-vulcanization.
- Military, Aerospace & Specialty Formulations: Mil-Spec compliant, Fluorosilicone, Flame Retardant (UL 94V-0), Low Outgassing, and Electrically Conductive compounds.
Process Advantages & Key Properties
- Superior Green Strength: Maintains dimensional stability during lay-up, slitting, and positioning before press closure.
- Excellent Substrate Adhesion: Achieves high-integrity chemical bonds to metal substrates, textiles, and composite structural layers during cross-linking.
- Controlled Rheology: Tailored viscosity and scorch safety prevent pre-cure voids and ensure complete mold fill.
- Consistent Gauge Control: Calendered precision guarantees uniform thickness across wide roll widths.
Frequently Asked Questions (FAQs)
What is uncured silicone sheet and how is it used?
Uncured silicone sheet is a fully compounded silicone elastomer that has not yet undergone vulcanization (cross-linking).
It is used by molders and fabricators who apply heat and pressure (via compression molding, autoclaves, or heated presses) to cure the silicone into final molded shapes, bonded composites, or reinforced diaphragms.
How should uncured silicone sheeting be stored?
To preserve cure kinetics, tack, and shelf life, uncured silicone sheet should be stored in a cool, climate-controlled environment away from direct sunlight, heat sources, and chemical contaminants.
What type of release liners are used on ElastaPro uncured silicone sheet?
ElastaPro supplies uncured silicone sheeting with specialized smooth or embossed poly release liners that protect the material, prevent sticking on the roll, and ensure clean stripping during pre-form lay-up.
Can uncured silicone sheet be bonded to metal or fabrics?
Yes. Uncured silicone sheet is ideal for overmolding and substrate bonding. During the heat and compression curing cycle, the cross-linking polymer forms strong mechanical and chemical bonds directly to prepared metal components or embedded reinforcing fabrics.