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PolyurethanesPolyurethanes are well suited for casting plaster, cement, waxes, and certain resins with the proper use of a release agent.
These products exhibit excellent physical properties at a lesser cost than silicone.
Webster & Sons is pleased to supply the following quality polyurethane mold rubbers for your needs - Poly 74 & 75 Series Pourable or Brushable rubbers. Our most popular polyurethane mold rubbers.
These polyurethane rubbers range in hardness from a soft A-20 to a firm A-90.Easy mix ratios make these products our most popular and versatile for casting plaster, wax, concrete and limited quantities of resin.Features:
Used for:
Poly CleaCut 45
1A:1B by volume, 30 min working time 450 cP mixed viscosity, a_45. Excellent bubble release without vacuum or pressure. Molds or part will be very clear, but will yellow slightly upon UV exposure. Not expected to yellow in liquid form. Designed for encapsulation molding/cutting or for casting rubber art objects and parts.
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Completely New Poly PT Series Liquid Plastics & Rubbers
The PT stands for "prototyping". These systems are useful to prototypers and moldmakers for higher temperatures (up to 220F) flame retardant (UL-94 V-) rated) or castable rubber part applications.
Poly 81 Series Pourable Rubbers
These products are very hard, with excellent abrasion and moisture resistance in cured form.
They are used for making a variety of hard rubber parts, forms, tools, rollers, etc. where the best wear and highest performance is expected from a hard liquid rubber.
Poly 81-90 is a very firm rubber with a shore A-90 hardness. Poly 81-D45 iseven harder systems that have only very slight flexibility and a feel that borders on that of a plastic.
Features:
Used for:
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Polygel® 35 & 40 & 50 Brushable
Patented Polygel® mold rubbers are 1:1 mix liquids that thicken during mixing to a brushable or sprayable viscosity.No Cab-O-Sil® or Part D is needed. Polygel® 35 & 50 can be applied about 1/4 inch thick while Polygel® 40 is thinner for best detail penetration.
Polygel® Spray 35 & 50 are a sprayable version. A mold can be made in an afternoon and cured overnight.Features:
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PolyTek Plastics: At A Glance
EasyFlo™ Series -Low viscosity, 1:1 mix by volume, fast-setting plastics. PolyTek's easiest-to-use and best-selling plastics!
Poly 15-Series -Strong plastics with varying densities: Some are like thermoplastics others like stone.
Poly-Optic® 14 Series -Water clear, non-yellowing casting resins for specialty applications demanding clear, bubble-free castings.
PolyFoam™ Series - Low viscosity, 1:1 mix ratio, fast setting rigid and flexible foams.
Poly LightCast™ - Easy, 1:1 mix ratio plastic with a wood like density.
Poly Plasti-Flex - Innovative flexible plastic for architectural moldings that bend, props and more.
PolyGel® Plastics -75 - Thickens to a paste upon mixing and cures in 2-4 hours. Makes great mold shells fast.
PolyGel® Shell - A sprayable plastic for creating mold shells, sprayed-up castings or surface hardcoats.
Polypoxy® Resins and Poly Cures -Epoxy systems for creating various castings including decorative bonded bronzes and tools that can withstand high heat.
EasyFlo™ 60, 95 & 120 Pourable Casting Resin
If low viscosity is important to you, look no further.
EasyFlo™ 60 is an outstanding new 1 : 1 (by volume) white polyurethane plastic with the lowest mixed viscosity available, 60 cps.
EasyFlo™ 95 has a 1A:1B by volume, 90 cP with 5 min pot life. Recommended for larger pours where EasyFlo 60 pot life is short. Designed for larger masses, not thin-section pours. Thinner casting will require heated molds for best chance of bubble free parts, without pressure. Pot life long enough so pressure casting is feasible.
EasyFlo™ 120 is best suited for rotational or slush cast pieces.
Features:
Easy Flo Clear
1A:1B by volume, 2 min light yellow/amber clear plastic, very low viscosity, releases bubbles nicely, great for filler and color casting applications. Best cast into a released and preheated (~140F) polyurethane mold. Slower to develop hardness in thin sections than EasyFlo 60, not recommended for higher heat applications.
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Poly 15 Series Pourable Casting Resins
Poly 15 Series liquid plastics are useful for production of decorative objects, parts, lightweight mold shells, tools, models, patterns, fixtures, duplicate masters, vacuum forming molds and general tooling use.
Poly 15-6, 1510, 1512 and 1512X have the feel and density of wood or thermoplastics and Poly 15-3 and 15-3X are more like stone.Features:
Used for:
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Poly-Optic® 14 Series Pourable Water Clear Casting Resin
Poly-Optic® Resins are two component, water clear, polyurethane casting systems, formulated specifically for application where optical clarity is a must.
Their low viscosities and long pot lives allow easy degassing and handling.Selected dyes may be added to each system to obtain clear, colored castings.Features:
Used for:
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