If you want reliable frost protection and a hydrophobic shield for harsh winter conditions, choose Prestone AS246; if you need a direct, affordable replacement part specifically sized for your Nissan Almera N17 windshield, choose generic Wiper Blades.
These two products serve fundamentally different purposes in the realm of vehicle maintenance. One is a chemical treatment designed to prevent ice buildup before it happens, while the other is a physical hardware component meant to clear debris once the glass is already wet or dirty. The decision between them isn't about which is "better" in a vacuum; it is entirely dependent on whether your immediate problem is stuck-on frost or a worn-out rubber blade that is smearing your view.
• Prestone AS246: Its greatest strength is creating an invisible, durable shield that stops morning frost and light ice from sticking to the glass, saving you time and effort during cold starts. The trade-off is that it is a consumable liquid treatment that requires regular reapplication rather than a permanent fix. This pick is for drivers who spend winters in freezing climates and want to skip the tedious scraping routine.
• generic Wiper Blades: Its biggest advantage is being a ready-to-install, flexible rubber solution tailored to fit the specific 21-inch and 14-inch requirements of the Nissan Almera N17. The trade-off is that it offers no proactive protection against ice formation; it only clears what is already there. This pick is for owners of that specific Nissan model whose current wipers are cracked, skipping, or failing to provide a clear view.
The Prestone AS246 Ice and Frost Shield Vehicle Glass Treatment is engineered for a specific type of struggle: the early morning rush in freezing weather. If you live in a region where temperatures drop below freezing regularly, waking up to a windshield covered in a layer of stubborn frost can be a daily ordeal. This product addresses that pain point by imparting a unique balance of hydrophobic and hydrophilic characteristics directly onto the glass surface. The result is an invisible barrier that prevents snow, light ice, and frost from adhering to your windshield and wiper blades in the first place.
For the driver who values efficiency and safety, this treatment dramatically reduces the time and effort required to clear the window. Instead of spending ten minutes chipping away at ice or waiting for a defroster to slowly melt a frozen sheet, you simply wipe off loose snow or drive with a clear view. The formula is designed to be used daily without altering the windshield itself, meaning you don't have to worry about damaging the glass or the wiper arms. It provides a consistent layer of protection that makes clearing the car much less of a hassle, allowing you to get on the road faster.
However, this product is not a universal solution for every vehicle owner. If you do not experience freezing temperatures or heavy snowfall, the utility of this specific shield diminishes significantly. It is also not a replacement for broken wiper blades; it does not mechanically scrape water or debris. You still need functional wipers to work. Furthermore, because it is a liquid treatment applied to the glass, it is a recurring expense and task. If you prefer a one-and-done hardware fix over a seasonal maintenance routine involving sprays or liquids, this might feel like unnecessary work. It is strictly for those facing the specific challenge of winter precipitation and ice adhesion.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-06 · 7 min read · Independent comparison
The generic Wiper Blades listed here are a straightforward hardware replacement designed for a very specific application: the Nissan Almera N17 models manufactured between 2011 and 2019. Unlike the broad-spectrum chemical treatment, this item is a physical component intended to replace broken, cracked, or failed rear wiper blades. When rubber degrades over time due to sun exposure, ozone, or age, it loses its flexibility and begins to smear water, leave streaks, or chatter across the glass. This set, consisting of a 21-inch and a 14-inch pair, is built to restore that mechanical function.
The design features a flexible soft layer made of rubber material, which aims to ensure smooth and quiet wiping action. The primary function is to withstand rain, wind, snow, and other debris that might otherwise impede visibility. For the driver who needs a reliable visual field during inclement weather, having blades that actually make contact with the glass without skipping is critical for safety. The installation process is described as simple, positioning these blades as a direct, easy fix for a frustrating problem caused by wear and tear. They support right-hand drive (RHD) configurations, making them a precise fit for the target market.
This product is not for someone looking to prevent ice from forming or to treat the glass chemically. It will not stop frost from sticking to the windshield overnight. It is purely a replacement part for when your existing hardware has reached the end of its life. If your wipers are currently functioning well but you are worried about the next storm, buying these might be premature. However, if your current wipers are damaged, cracked, or simply failing to clear the view effectively, this set offers a targeted solution. It is for the practical driver who knows their car's specific size requirements and needs a quick, reliable swap to maintain safe driving conditions.
• Best for preventing ice buildup → Prestone AS246 creates a shield that stops frost and light ice from sticking, a feature the physical blades cannot offer.
• Best for restoring visibility on a damaged windshield → generic Wiper Blades physically replace worn rubber to clear rain and snow when the old parts are failing.
• Best for winter mornings in freezing climates → Prestone AS246 saves significant time and effort by eliminating the need to scrape thick layers of ice.
• Best for Nissan Almera N17 owners (2011-2019) → generic Wiper Blades are specifically sized (21"+14") and engineered to fit this exact vehicle model.
• Best for long-term glass protection → Prestone AS246 provides a durable, invisible shield that can be used daily without altering the glass surface.
• Best for a quick, mechanical repair → generic Wiper Blades offer a simple, reliable replacement for components that have failed due to normal wear.
• Best for reducing noise and smearing → generic Wiper Blades utilize a flexible soft layer design intended to make wiping smoother and quieter.
• Best for off roading → Prestone AS246 is the superior choice for off-roading scenarios where dust, mud, and sudden temperature drops create unpredictable visibility challenges; the chemical shield helps keep the glass clear of sticky grime and frost that would otherwise clog standard blades.
In my opinion, if I had to choose one product for a vehicle that sees serious winter use or off-road conditions, I would select the Prestone AS246. The ability to prevent ice and frost from adhering to the glass in the first place transforms the morning routine from a chore into a breeze. While the generic blades are a necessary fix for a broken part, they are reactive; they only help after the damage or failure has occurred. Preventive protection against the elements is a more valuable investment for safety and convenience. That said, if your wipers are already broken and you drive a Nissan Almera N17, you must buy the blades first. But for general preparedness, the chemical shield offers a level of control over visibility that hardware alone cannot match.
No, they solve different problems. Prestone AS246 prevents ice from sticking to the glass, while new blades are needed if your current rubber is cracked or failing to wipe clean. You may need both for optimal winter performance.
No, these specific blades are designed exclusively for the Nissan Almera N17 models from 2011 to 2019. They come in a 21-inch and 14-inch set and support RHD configurations, so check your vehicle's exact year and model before purchasing.
The product description states it prevents ice and snow from sticking to the wiper blades themselves, which could reduce the strain and wear caused by scraping frozen glass, potentially extending their life.
Regular reapplication is implied to maintain the invisible shield against environmental factors.
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