






🪵 Restore, Reinforce, Repeat — Woodwork that Won't Quit!
Rustins Wood Hardener is a 500ml solvent-based, professional-grade solution designed to penetrate and stabilize rotted or soft wood. Ideal for both indoor and outdoor use, it strengthens damaged timber quickly, providing a durable base for filling or painting. Trusted by DIY enthusiasts and professionals, this fast-acting formula enhances wood longevity while protecting against moisture and decay.




| ASIN | B017J3GUU4 |
| Base Material | Wood |
| Best Sellers Rank | 1,661 in DIY & Tools ( See Top 100 in DIY & Tools ) 13 in Wood Fill |
| Brand | RUSTINS |
| Coating Description | Penetrates deep into rotten wood and forms a hard and tough surface |
| Colour | Clear |
| Compatible Material | Wood |
| Container Type | Bottle |
| Country of Origin | United Kingdom |
| Coverage | Deep Penetration |
| Customer Reviews | 4.5 out of 5 stars 2,986 Reviews |
| Finish | Matte |
| Included Components | Rustins Wood Hardener 500ml |
| Item Dimensions | 9.5 x 4.4 x 17 centimetres |
| Item Type Name | Wood Hardener for Rotted Wood |
| Item Weight | 0.67 Pounds |
| Liquid Volume | 500 Millilitres |
| Manufacturer | Rustins |
| Manufacturer Warranty Description | N/a. |
| Material | Solvent based , Wood Hardener, polymer solution. |
| Model Name | WDHD500 |
| Model Number | WDHD500 |
| Model name | WDHD500 |
| Opacity | 0.5 inches |
| Recommended Uses For Product | Indoor and outdoor use |
| Size | 500 ml |
| Special Features | Moisture Resistant |
| Surface Recommendation | Wood |
| Surface recommendation | Wood |
| Unit Count | 500.0 millilitre |
M**T
Does what it says on the tin !
Really goid product, literally does what it says on the tin. Used to restore an old storage crate which had been riddled by woodworm. Part of the wood was almost like paper where you could squish it by hand. This has hardened the wood to the point where it is now stable and no longer disintegrating. It has left a slight sheen to the wood , rather than shiny and darkened it slightly but the darker colour may be because this wood had been left untreated for so long. The easy was was to treat the entire lights of wood so it all looks the same. But as the crate is an old apple crate using different types and thicknesses of wood it blends in quite well. Would rather have it the way it looks now than in danger of falling apart and worried about moving it. Don't get me wrong I wouldn't lift it up by the treated piece as I dont think it would bear the weight. But it has definitely stabilised and strengthened the wood to an almost miraculous level. Very happy with this product and would definitely use/ buy again Follow the instructions, wear gloves and clothes you dont mind getting soiled. And if possible work outside as a very strong smell. If workung inside iluse in a well ventilated area as it has a very strong smell ( similar to turps or paint thinners).
O**R
Works a treat
I use this to repair exterior wood door/window frames etc., applied before filling with Toupret wood filler. It brushes on well, wood takes it up easily, and any excess will evaporate or harden anyway (just may take longer than stated drying time). Only docking a star because as nice as the tin is, it's not easily poured, does leave some inaccessible and wasted, and I have had it harden in tin from poor lid seal.
M**!
This Stuff is Amazing!!
This is a thin resin type material. It reminds me of the liquid used for fibre-glass, or perhaps a thin version of PU glue. It's stinky and pretty horrible if you get it on your fingers. It's readily absorbed by wood, and the end effect is rather like painting it with yacht varnish, except it's rock hard in two hours. It sets like plastic so the surface is water repellent and tough. Looks like a varnish, so you may not need any finishing at all, or seems to be a good base for paint. All in all it's a fantastic product. This is the first time I have used it, it won't be the last. I had imagined this to be absorbed like a very thin liquid and to then convert all the soft wood to something really hard. That's not really what it does. Yes, there is some absorption, but not much. It forms a solid, yes, but only the top of the treated wood. So, I think the way to proceed is to thoroughly soak the wood with preservative, then when that's dry, hit it with this to form a water resistant surface that protects and provides a great key for filler. Highly recommended.
R**N
This product consolidates rotten wood and hardens it pror to repair
Works well does what it says
R**.
Great product
We have old wooden windows that need replaced but as we can’t afford to do this at the moment I applied a heavy coat of this to them all and once it was set I put a coat of Zinsser paint on them. It’s a quick fix but I was very happy with the product and am confident it should buy us a few years to save up and eventually get plastic ones out in. Would highly recommend.
C**Y
Works well for what I wanted. Recommended!
This works well for what I wanted. Easy to apply, has good coverage even when applied thick. 2 of these covered my bin store lids (approx. 1x2.5m squared). Leaves a protective film like finish, which resists rain and strengthens the pallet wood I used nearly 4 years ago. Price is average I think. Recommended.
K**L
Works brilliantly
This is fantastic. You only need a small amount and it works brilliantly better than a lot of the other ones I have tried
T**K
Good product, bad cap.
Seems to work well (although you have to use a whole lot for problem areas), but the cap is AWFUL. the seal broke, so I had to dig a hole with a screwdriver, and the 'pinch to open' cap won't open without a pair of pliers.
Trustpilot
1 month ago
2 days ago