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Rainfast® Surfactant/Wetting Agent

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The 100%-active ingredient, a non-ionic surfactant to enhance ag chemical performance through rain-fastness, leaf wetting, and stomatal flooding

We cannot ship this product into: AR CA DE ID MS


Produces rain-fastness, leaf wetting, and stomatal flooding
Maximizes performance of pesticide and foliar fertilizer applications. Keeps your solutions on target plants and produces stomatal flooding. Does an unbeatable job in water-based sprays and with fungicide applications. Six to 12 ounces treats 100 gallons of spray solution; 1 gallon treats 1,100 to 2,100 gallons of spray solution.
  • Improves pesticide efficiency
  • Produces superior leaf wetting, spreading, and penetration


What are the usage rates for Rainfast?
Usage rates are:
  • 6-12 ounces per 100 gallons of solution
  • 1 ounce per 100 gallons in foliar fertilizers.
What is the application rate for Rainfast?
Depending upon pesticide labels, apply 6-12 ounces per 100 gallons of water.

Follow pesticide labels carefully for specific use recommendations with post-emergence herbicides.

What is Rainfast?

Rainfast is a highly effective nonionic surfactant/wetter/spreader penetrant, based on chemistry that provides superior leaf wetting, spreading and penetration of spray solutions.

You can maximize the performance of pesticide or foliar fertilizer sprays by keeping the solution on target plants. Rainfast produces rain-fastness quickly. Follow the chemical label for usage rates.

File Downloads

pdf Rainfast Safety Data Sheet (Size: 168.8 KB)
pdf Rainfast Sell Sheet (Size: 189.1 KB) 
pdf Rainfast Spec Sheet (Size: 83.3 KB)
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