# SIRAMICO COATINGS S1059 Wood Hardener, 500ml

SIRAMICO COATINGS S1059 is a liquid hardener intended to treat wet or rotted timber. The listing claims brush-or-roller application, use on damp wood and coverage of up to 8 square metres, but gives no application rate or curing time.

- [Original product page](https://bargainpostbox.co.uk/product/siramico-coatings-s1059-wood-hardener-500ml)
- [View offer](https://bargainpostbox.co.uk/visit/siramico-coatings-s1059-wood-hardener-500ml)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: SIRAMICO COATINGS
- Model: S1059
- Category: Tools & Garden > Hardware & Building Materials
- Price: 10.99 GBP
- Previous price: 12.99 GBP
- Discount: 15%
- Price checked: 2026-11-12T17:59:45.479Z
- Rating: 4.4 / 5
- Reviews: 532

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing describes a clear, deep-penetrating hardener suitable for timber and claims use on damp wood.
- Listed for interior and exterior timber, with window sills, door frames and structural beams given as examples.
- A 500ml container is claimed to cover up to 8 square metres. Actual coverage may vary with the wood and its condition.

## Pros

- Can be applied with a brush or roller according to the listing.
- The stated coverage gives buyers a planning estimate for smaller timber-treatment jobs.

## Specifications

### Identity
- Brand: SIRAMICO COATINGS
- Model: S1059
- Form: Liquid
- Compatible material: Wood
### Volume and coverage
- Liquid volume: 500 Millilitres
- Coverage: 8 square meters
- Number of packs: 1
### Dimensions and installation
- Weight listed: 500 Grams
### Finish
- Finish type: Matte
### Recommended use
- Use: treating wet and rotted wood, strengthening and protecting wooden structures

## Before you buy

- The listing calls the finish both clear and matte. It also describes coverage as up to 8 square metres, while the recommended-use text names wet and rotted wood and does not specify application rate, curing time or how coverage varies by timber condition. Confirm finish and directions on the selected product before use.

## In the box

- 1 product unit (Included)

## A good fit for

- DIY repairs to damp or rotted timber where a liquid hardener is appropriate.
- Buyers treating smaller areas such as window sills or door frames who can follow the product label for application and curing.

## Less suited to

- Buyers who need a stated curing time, application rate or guaranteed coverage for a particular timber condition.
- Buyers seeking a wood filler or a product with a confirmed final appearance.

## Customer feedback

Customer feedback is generally favourable about ease of application, drying, absorption and the way the treated wood feels harder. Consistency and hardening are not uniformly described, including a comparison to watered-down PVA glue. That variation matters when judging application feel, while the listing does not provide a curing time or measured hardening performance.
- Positive themes: Customers describe the product as easy to apply and report that it dries and absorbs well.
- Positive themes: Feedback reports that treated wood feels stronger or harder.
- Mixed feedback: Consistency and hardening receive mixed feedback. One comparison describes the liquid as similar to watered-down PVA glue.

## Frequently asked questions

### How much area does the 500ml container cover?
The listing states coverage of 8 square meters, and a feature claim phrases this as up to 8 square metres. Treat it as an estimate rather than a guaranteed coverage rate.
### Can it be used on damp timber?
The listing says the liquid can be used on damp wood and is intended for wet and rotted wood. Follow the product label for preparation and application.
### Is it for indoor or outdoor use?
The listing claims suitability for both interior and exterior timber, including window sills, door frames and structural beams.
### What finish does it leave?
The listing is inconsistent: it identifies the finish as matte and also describes the hardener as clear. Check the selected product's label if the final appearance matters.

## Offer details

- The 10% voucher applies to the Subscribe & Save purchase option only.

## Alternative options

- [Wood Hardener, 250ml Wood Hardener for Rotted wood Exterior \| Deep Penetrating Stabiliser & Sealer, Interior and Exterior Use, Suitable for All Timber Types](https://bargainpostbox.co.uk/visit/siramico-coatings-s1059-wood-hardener-500ml)
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- [SIRAMICO COATINGS Wood Waterproofing Solution, Clear – 2 x 5L \| Clear invisible finish wood preserver for fences, decking, sheds and garden furniture.](https://bargainpostbox.co.uk/visit/siramico-coatings-s1059-wood-hardener-500ml)
- [EAZYFIX Premium Wood Filler Repair Kit – Wood Rot Standard Set – 1x Filler, 1x Hardener, 1x Rot Cutter, 3x Cups, 3x Brushes, 3x Wooden Sticks](https://bargainpostbox.co.uk/visit/siramico-coatings-s1059-wood-hardener-500ml)
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## Add-ons

- [Rustins Wood Hardener for Rotted Wood 500ml - Repairs Rotted Timber \| Fast-Acting Formula Reinforces Soft, Damaged Areas Befo](https://bargainpostbox.co.uk/visit/siramico-coatings-s1059-wood-hardener-500ml)
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## Images

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 1](https://bargainpostbox.co.uk/i/r-ulUV2D3xnPzuUrP0jdN6mTmzw7wUZOKFwiidHn9wcjIbAw1ypL4aDMVr-K57RJAf1_lU_3_6j7RTUCUv13aQz9pP-9JXcWXz3uAwBnbcRxXua_MtmG1E4e.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 2](https://bargainpostbox.co.uk/i/C4fpAJ5RFW0VFf3jUZaoUQ9TbR0fsKIgAoXtLm0NQL-dyjvdm_JxExtaNZPYfiXO-cQJ4k_UJzdm85JGQcLhlUPBj1Jio-CgaMapy8pj0EhchusIK8phcpE-.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 3](https://bargainpostbox.co.uk/i/ad6GFs5q0RtnuSJMPe_vhtBMbPLrFhwAIoMzR0Ji_mobkffiWO8HFA2XECZq08jjipPVP5qXUGrqs0Q6WA1ByqvQUHLifFmdNifGm5YavYtaOb-93J6himbx.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 4](https://bargainpostbox.co.uk/i/UzXPNvsvFNUDV1Nu4T_bCS49Od1unqhirZpZJN6G8LliLgxpXma4c_2WCjAb8b1Zum1trDBxl4fFQj0LI41OZNs_EoKNlPatSkan_TdgQoaipjZgbQQ7reg-.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 5](https://bargainpostbox.co.uk/i/ZommDy1Aq-vzpuM__jgXAvbzSBxAp3GlaJ2HvXkX3CRM3eSOKsFr183WW9kfEMnUDZVnCFy1h4OG9dN6DsAC69b7KkYLb_BKafx-TJzZe83RK3t7DY0ecqTp.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 6](https://bargainpostbox.co.uk/i/ve8IS0YAZEcGPtPqkbMW_7JBqyRDlTOSvMWCclaenydFiC5kPUMUdF_juRdTYVEbBxSrbKlQecPOyP1c4rydxo58GbpnHoHi-7o9cXDF7t4ziQQguVrgH7Wi.jpg)

![SIRAMICO COATINGS S1059 Wood Hardener, 500ml — 7](https://bargainpostbox.co.uk/i/F-Z633Cs-GJSqonFK3ewetlE4ltFWC8Tu8PkuTSvZrk2-f1mBI3h5JNaU-Oy-xZ8loQe-PSbaL2_Z_pjE-Oa-zuBk7xb-ryRxrVl6zvqbXlcDO9ZCi1ICSNu.jpg)