Ronseal High Performance Decking Cleaner Sachets

  4.7/5.0   79 reviews
You'll need enter area above for 1 coat (Usually sufficient)
You'll need enter area above for 2 coats (Sometimes necessary)

Wood type and application can vary coverage

  • Concentrated dissolvable cleaning capsules for exterior decking and timber
  • Pack contains two sachets making 5L to treat up to 24m²
  • Kills and removes moss, mould and algae
  • Opens up pores of the wood for better penetration and adhesion of oils and stains
  • Convenient pack size for easy storage - No large tin or container
Brand Ronseal
No. of coats 1-2
Coverage Up to 4 per litre
Drying time hrs
MPN 36438
GTIN 5010214864386

To prepare decking or other garden wood for cleaning with Ronseal Decking Cleaner, first remove any debris including leaves, twigs, soil, weeds and large amounts of moss and mould using a stiff brush. Do not wet decking.

Always do a small test area before starting any project and follow the manufacturer's instructions on the packet at all times.

How To Clean Decking

  1. Remove the cleaning capsules from the outer packaging
  2. Cut the inner case to remove the capsules - be careful not to pierce them if you use scissors
  3. Place one capsule of deck cleaning solution into 2.5 litres of warm water or two capsules into 5 litres of warm water (Warm water will allow the decking cleaning capsules to dissolve more quickly)
  4. Stir and leave the capsules to dissolve for 90 seconds (3 minutes in cold water)

How To Clean Algae From Decking

  1. Once diluted, apply to areas needing treatment using a watering can, Ronseal Sprayer or a brush
  2. Allow to dry fully
  3. After 2-3 days any green appearance will have disappeared
  4. Clean the wood after application by using a brush to clear away any remaining dusty deposits

How To Clean Moss and Mould From Decking

  1. Apply the cleaner with a watering can, Ronseal Sprayer or a brush
  2. Scrub the deck well with a stiff bristle brush and leave for 10-15 minutes
  3. Wash off with a brush and water or hose down ensuring all residues are washed away

Please note: When using this product, take care to protect plants, fish ponds, rivers and drains from contamination. This product may remove partially deteriorated or flaking coatings when applied to clean decking.

Q. Can I use Ronseal Decking Cleaner to remove the old decking stain or decking oil from my deck?

A. Unfortunately not. This product has been designed to clean and remove mould, algae and fungi. If you want to remove an existing decking stain or decking oil, you will need to jet wash the decking or use a decking stripper / remover.

Q. Is it safe for my plants?

A.This product is hazardous to plants when wet but safe when fully dried.

79 customer reviews

Good stuff

Reviewed on: 23/08/17
Good Cleaner by Ross Irvine

Does exactly what was required

Reviewed on: 16/08/17

As I'd already given the decking a really good scrub, I didn't notice much difference. I'm sure, however it would be useful. Will have to wait until next year.

Reviewed on: 12/08/17
Yes good stuff and went far by Jonathan Denton

Would use again

Reviewed on: 07/05/17
As it says on the tin by Duncan Brown
Reviewed on: 04/05/17
Does the job well by Stephen Weaver
Reviewed on: 30/04/17
Excellent product by David Kelly

I used one sachet at a time brushing on with with a Harris brush. I left it 15 minutes and brushed (scrubbed) again. Worked well and left the decking ready for staining.

Reviewed on: 29/04/17
Good by Alan Heaps
Reviewed on: 29/04/17
Works very good but didn't order enough by Wendy Sanders
Reviewed on: 28/04/17
Very satisfied by John Paintain

Used in my decking, applied by watering can, left on the wood for one week. Hosed down and the deck looks like new and ready for oiling, very pleased with this product.

Reviewed on: 28/04/17
Product for deck cleaning by Mrs L Corke

Used this to remove mound it worked and gave a good deck clean

Reviewed on: 28/04/17
Never brought this product before but was told its good , it's absolutely amazing by Annmarie Harcup
Reviewed on: 18/04/17
Super easy to use by Danielle
Reviewed on: 14/04/17
Efficent decking cleaner prior to applying the decking oil by Charles Ross
Reviewed on: 12/04/17
Very good by Anthony Mcgrath

Cleans the decking very well.

Reviewed on: 06/04/17
Good by Mr James Casswell

good product price and delivery what more do i want

Reviewed on: 05/04/17
Always use it by Stefano Bruno
Reviewed on: 30/03/17
Does the job by David Munro

this contains phase-transfer surfactants, and is very useful in situations where acid-based algicides might cause corrosion on adjacent surfaces

Reviewed on: 26/03/17
Have used for several years prior to using oil for decking, very good results by Sue.Caldwell Shot

Have used for several years prior to using decking oil and very pleased with results.

Reviewed on: 07/03/17
Easy to use by Mr Dennis Freeman

Excellent product

Reviewed on: 03/11/16