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Chemical Technologies & moulding systems
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Polyurethane Casting Resins FAQ

Home Page | Frequently Asked Questions | Polyurethane Casting Resins FAQ

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  • 1. I find I get bubbles in my clear casting resins; why is this?

    Even after vacuuming, once the resin is poured into the mould it can extract air from the mould itself, particularly as the temperature rises as it starts to cure (the exotherm increases). We would always suggest that the way to avoid this is to preheat the mould for 1-2hours at 40-50 degrees C. -
  • 2. What if my urethane shows low tensile strength?

    In thinner sections, they can be brittle: this would generally be the result of poor mixing or wrong ratio. This can be counteracted to some degree by post curing, which will improve the properties -
  • 3. At what temperature should they be used?

    Most need to be used at room temp)25 degrees C), but there are some that require an elevated temperature for curing. -
  • 4. How can I determine which Pu I should use?

    There are several criteria you can sort by: Thin/thick section casting Quick setting Filled resins Water white/clear castings Heat resistance High impact resistance Thermoplastic appearance Room temperature curing -

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Our Recent News

Mar
12

Price and Supply Customer Notificationposted by Richard

Jan
24

Brexit Preparations January 2019posted by Richard

May
28

Prosthetic range of Silicones – Jacobson Chemicals are pleased to have partnered with American manufacturer Silicones Incposted by Richard

Feb
17

Charlie Cooper flourished as an artistposted by Richard

Feb
08

Flexil S RTV J24 General Purpose Moulding Siliconeposted by Richard

Featured Products

  • Super Sculpey Super Sculpey (Flesh Pink) 454 gms bar £14.00 ex Vat
  • PVA release agent PVA Blue Matt Release £35.10 ex Vat
  • J Foam 4087 A/B J Foam 4087 A/B £96.40 ex Vat
  • Rost Flash Rost Flash Rust loosener with freeze shock £6.25 – £60.00 ex Vat

Product Tags

Acetone Aerosols and Release Agents Alginate boards brushes Buy Online Catalyst cleaning fluid Clear Resins and Rubbers CRC Industries Dow Duramould Epoxy casting systems equipment extra catalyst Extra Catalyst F10 Fillers Flexil Foams Food Grade Food grade Moulding Silicone Liquid Latex machine oil Matting Metal Powder Fillers Modelling Materials Moulding rubbers New products Pigments Pigments for Silicone Poly-addition cure Poly-addition cure silicone Poly-condensation Polyester Polyester and Matting polyurethane elastomer Polyurethane PEPU Pigments Polyurethane Resin & Elastomers Prosthetic Silicones PU Cleaner RTV Silicone Silicone paint Silicones Tissue

Frequently Asked Questions

  • Aerosols & Release Agents FAQ
  • Equipment & Ancillaries FAQ
  • Hot Melt Compounds FAQ
  • Metal Alloys FAQ
  • Modelling Materials FAQ
  • Pigments, Powders & Fillers FAQ
  • Polyurethane Casting Resins FAQ
  • Polyurethane Foams FAQ
  • Styling Materials & Boards

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