Flow-seal environmental pens and bottles channel controlled amounts of no-clean flux, rma, solvents, lubricants, masking and water-based liquids. Flow-seal products prevent evaporation of material and conform to current regulations for controlling substances capable of evaporation hazard. A unique dispensing valve prevents flooding and spattering, releasing material in controlled amounts to the nib (tip).

The pen or bottle is in two parts (cap and reservoir) and is easily assembled. The reservoir should be filled with material to within 0.75" (19mm) of the top; this air chamber allows for the valve cap to be pressed securely in position. Priming is achieved by depressing the nib while the pen is vertical. Flow-Seal products are supplied with nib 381-8425-AC. Pricing is for a pack of 1.