Although glass appears very smooth and flat it has micro pores that collect contaminates like salt, sap, acid rain, hard water stains, lime scale, bug smear, oils, pollution, exhaust fumes, soil and more. These contaminates are ground into the glass by windshield wipers that can exert over thousand pounds of force per square inch. When it rains or snows moisture clings to micro pores and the contaminates in them, so the wipers create a smearing effect when they are used. Glass Science has created two great products that will allow you to deep clean the pores in the glass and seal the pores with a protective coating for clean and clear vision. The Glass Scrub is a cream cleanser that strips out any and all contaminates from the glass. The Glass Science Glass Scrub can remove water marks, sap, acid rain, lime scale, road grime and much more. After the glass has been thoroughly cleaned by the Glass Scrub the Rain Repellent will be applied next. Unlike most glass protection the Rain Repellent is gel based and contains no evaporating solvents that limit the durability of the protection. The gel based formula goes on streak free and has 100% active ingredients that will keep it protecting your windshield for longer. The Rain Repellent forces any form of moisture in to tiny beads that can easily be swept away or roll off the glass. The Rain Repellent’s coating helps prevent smearing so you can see clearly with ease. On rainy or snowy days you will be happy to have this valuable protection that increases your ability to see and gives you more time to react to road conditions. These two products combined are the ultimate combination for clear glass and safer driving. 1x Glass Science Rain Clear 5oz 1x Glass Science Glass Scrub 3.5oz Sample