Compare Bio-Shield® with Wet and Forget

Testing and Review of Wet and Forget by a leading consumer organisation found there was:

'No noticeable difference in cleaning performance between the cleaners tested so, consumers can safely choose based on cost per dilute litre'

Why pay $3.30 / diluted Litre for Wet and Forget when Bio-Shield® has the same active ingredient and is only $0.94c / diluted Litre.

Blind testing and review of outdoor cleaners was carried out by a leading consumer organization. This testing found there was no difference in cleaning performance between Wet and Forget and other outdoor cleaners with the same active ingredient. 

Bio-Shield was tested and certified by two independent laboratories to have the same active ingredient as Wet and Forget yet Bio-Shield costs 72% less than Wet and Forget.
In November 2014 we invited Wet and Forget to substantiate their claim that Wet and Forget was the best product, better than Bio-Shield.
Wet and Forget has not yet provided any evidence to substantiate that claim.

Bio-Shield® - Lowest diluted litre cost in the Comparison Table

Product 5L Diluted Total Cost to Buy Diluted Litre Cost
Bio-Shield® 105L $99.00 $0.94c
30 Seconds 30L $39.90 $1.33c^
30 Seconds 25L $39.90 $1.60^
Soak n Croak 85L $107.9 $1.27
Clene Up 30L $39.45 $1.31
Moss Boss 25L $38.48 $1.54
30 Seconds Roof 25L $54.90 $2.20^
Move It 30L $52.76 $1.76
Spray & Go 30L $89.90* $2.99
Wet and Forget 30L $79.20** $2.64
Wet and Forget 30L $99.00* $3.30

Comparison Table © 2008 -2022 All Rights Reserved
All Prices are in NZD for NZ Delivery
*Delivery charges may be additional and increase cost
** Labour Weekend Sale Price
^No Home Delivery Available From Mitre 10 - Must be picked up in store

Active Ingredient

Proven by independent
laboratory testing

Same method of
cleaning action

Proven in over 38 years
of commercial use

Up to 71%
less cost

Bio-Shield is just 94c per
diluted litre, why pay up to $3.30?

Bioshield 5L with Badge.jpg__PID:1baaade8-5357-4459-8b2c-740afaf5c037

Independent lab testing of Bio-Shield®

In October 2014 Bio-Shield was tested and certified by two independent laboratories, Labtec and Hill Laboratories, to have the same active ingredient as Wet and Forget. In November 2014 we invited Wet and Forget to substantiate their claim that Wet and Forget had better performance than Bio-Shield. Wet and Forget has not provided any evidence to substantiate their claim.

How to choose based on price.

The true cost of outdoor cleaners is not how much you will pay to purchase, but the price per litre of diluted solution - purchase price divided by the amount of diluted solution made up. The lower the diluted litre cost the better the value.

A 5L of Bio-Shield has a higher concentration of active ingredient and the lowest diluted litre cost of the outdoor cleaners in the comparison table above.
It costs $99 and makes up 105L of full strength solution - $99 divided by 105L gives a diluted litre cost of just 94 cents diluted litre.

That's a saving from 22% and up to 71% less cost per diluted litre than other brands compared in the Price Comparison Table.

Bio-Shield® is Proven Effective

We have used Bio-Shield® for over 40 years in a demanding commercial environment on a wide range of surfaces, from cleaning concrete to Coloursteel, roofs to driveways. Bio-Shield works, we have build our reputation on it.

Bio-Shield will give a powerful, rapid kill of moss, fungal, algal and lichen growths, and can prevent re-growths. It can be used to clean any exterior surface.

For the correct application of these exterior cleaners, it is important the surface being treated is saturated and kept wet until the moss, mould and lichens are dead - in as little as 15 to 20 minutes using Bio-Shield®.

Porous surfaces such as concrete or timber will soak up the applied solution; so the 105 litres of diluted solution made with a 5 litre bottle of Bio-Shield® Concentrate provides more than sufficient coverage for a successful result in most domestic situations.

When Bio-Shield® is used on non porous or smooth surfaces such as painted weather boards or a Coloursteel roof, coverage will be greatly increased, making Bio-Shield® even more cost effective.

Benefits of using Bio-Shield®

Notes for the Price Comparison Table

  • All the products listed have the same or similar active ingredient at similar diluted concentration and work well when used as directed.
  • All the products listed work to clean a dirty exterior surface without the need for scrubbing or water blasting.
  • Quoted purchase prices are standard retail price.
  • Quoted dilution rates are given for treating concrete such as paths, driveways or roofs.
  • Bio-Shield diluted litre cost includes FREE weekday delivery within New Zealand, (excluding Great Barrier Island), other products listed may have added freight charges ranging from $5 to $15, increasing the diluted litre cost stated in this table.

Bio-Shield® 5L costs $99, including FREE NZ Delivery.
It makes up 105L at a cost of just 94 cents per diluted litre.

105L fills 21 x 5L Sprayers

Wet and Forget 5L costs $99.
It makes up 30L at a cost of $3.30 per diluted litre.

30L fills just 6 x 5L Sprayers