This is our original Big Blu microleak detector downsized into a brush on applicator. This product is great for spot leak applications and is supplied with a 10 in telescopic dauber. It is used by OEM's and industry professionals worldwide. This is the only bubble/foam solution capable of detecting gas leakage down to 0.71 oz/year. Use on any gas including oxygen.

Refrigeration Technologies® Big Blu Microleak Detector, 8 oz, Bottle with Telescopic Dauber, Liquid, Blue, Characteristic, 0.74 oz/yr Sensitivity, 7 - 8 pH, Greater Than or Equal to 100 deg C Boiling, 0 - 185 deg F

• Ultra sensitive formula detects leaks down to a rate of 0.74 oz/yr
• Tested safe on all gases including oxygen
• Safe to use on all metal surfaces
• Biodegradable and eco friendly

• SDS https://assets.unilogcorp.com/267/ITEM/DOC/Refrigeration_Technologies_RT175B_SDS.pdf