For example, the 8001 and 800067 tips have a flow rate of 0.10 and 0.067 gallons per minute respectively. Spray pressure also affects spray quality. Though a higher pressure produces smaller droplets, a benefit, it also increases the volume flowing through the tip, a negative. At pressures between 30 and 60 psi the volume flowing through the 8001 flat spray tip is sufficient. Therefore, a higher pressure does not necessarily help you reduce release agent film thicknesses nor does it necessarily mean better looking concrete.
Temperature has little effect on factors controlling the spraying process.
Using premium carrier oils that don't thicken much until temperatures drop below about 15 F helps solve this problem. For release agents made with these premium oils, increasing the spray pressure by 5 psi or so overcomes any spraying problems caused by thickening. With less sophisticated release agents and when temperatures fall below about 40 F many release agents thicken. Products made with diesel oil, kerosene, mineral spirits and some other common solvents fall into this confusing flash point range. Transportation regulations are an area of environmental and OSHA concern for release agents, curing compounds, sealers, waterproofing materials and coatings.