The UV Blocker works in a different way to Optivex as it absorbs the UV radiation. Hence the transmission of light is lower and will absorb about 350nm of radiation (not suitable for museum or gallery use; ideally suited for commercial applications where 100% protection is not required).
The maximum temperature is 600°C. Please note the higher the light source, the more UV radiation output. 3mm and 4mm thicknesses available from stock.