Resin (acrylic) only, no catalyst included. Requires Catalyst Prod. No. 18186: UV, benzoin methyl ether SDS (99KB PDF) (~365nm) (0.5% w/v); "blue light", benzyl (~460nm) (0.1% w/v); benzoyl peroxide SDS (113KB PDF) (1% w/v), cold-cure. Accurate measurements of catalyst are very important. LR Gold can be used at low temperatures (-25°C) and has proven very useful for immunogold procedures. Very low viscosity: 8cP. Applied to both LM (enzyme histochemistry) and EM (immunochemistry) techniques.