Owatrol Net-trol is particularly suited for horizontal or vertical surfaces such as cladding, screens, fencing, decking, office buildings or garden furniture. It will also neutralise wood surfaces which have been stripped with a stripping product such as Owatrol’s Dilunett or Prepdeck, leaving the surface ready for applying your chosen finish. Net-Tool is safe to use on all exterior woods and is also excellent as a de-greaser for use on tropical hardwoods. Our recommendation would be to purchase a sample of Net-Trol and try it on a small area of the sandstone.

You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. There are no known restrictions for using Net-trol on porcelain, but we always advise testing on a small area first before treating the whole area. Owatrol Net-Trol Wood Cleaner can remove stains caused by tannin bleed and will remove all traces of weathering caused by mildew, pollution and UV rays. The Royal Horticultural Society, and its logo, are trade marks of The Royal Horticultural Society (Registered Charity No 222879/SC038262) and used under licence from RHS Enterprises Limited. I can confirm that Net-Trol is safe for people with pets to use as it is washed away with copious amounts of water during the process.It is entirely possible that Net-Trol will help with your problem but unfortunately we can’t make any guarantees. It is safe to use on all exterior wood types and is also an excellent degreaser for use on tropical hardwoods to allow finishes like Deks Olje D1 to penetrate. Having spent a lot of money on his new patio he was understandably anxious to find something that would remove the stains. Net-Trol is perfect for tackling rust stains on sandstone paving, just be sure to give it a good scrub.

This is a Session Cookie (session cookies are temporary and are erased when you close your browser). Begin the sanding process with the 80-grit then move on to the 120-grit to get below the most weathered timber (a thorough sanding with both grits is important to get a quality finish)—before moving onto the wood-saturating oil application.

Sadly, many slabs have dried to reveal a rusted finish which I have established has been caused by the acid used (hydrochloric 5%). Hi, I have an Indian sandstone patio where I keep the dogs and they are fenced in by a galvanized fence. They mention that it is perfect for removing rust stains and moss killer stains from patios, sandstone, and old wood. It will also neutralise wood surfaces which have been stripped with a stripping product such as Owatrol’s Dilunett or Prepdeck, leaving the surface ready for applying your chosen finish. Net-trol can be used neat or can be diluted with water, depending on the work to be done and the condition of the surface.