Would you use this on the whole area

It's only required on the rotted area. Cover the entire rotted area, allow to dry then rub down.

How long between applying coats?

About four hours. Longer if colder. If you are using wood filler allow about 12 hours after wood hardener is applied.

Under the cap, there’s a little metal lid that seems to be welded on!! Any advice on how to take it off safely? I’ve tried a stanley knife but nope.

I used a screwdriver to prize it off. Not easy but don't worry about destroying the metal lid.

Does this dry clear, or milky white?

It dries clear unless it gets wet before drying - then it is milky white - I found the same with the Ronseal product

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Rustins Wood Hardener for Rotted Wood 500ml - Repairs Rotted Timber | Fast-Acting Formula Reinforces Soft, Damaged Areas Before Filling or Painting

Rustins Wood Hardener for Rotted Wood 500ml - Repairs Rotted Timber | Fast-Acting Formula Reinforces Soft, Damaged Areas Before Filling or Painting

Product ID: 53809060

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Details

Colour
Clear
Brand
RUSTINS
Surface recommendation
Wood
Material
Solvent based
Model name
WDHD500

⚡fast-acting deep penetration

💧moisture resistant for durability

🛠️500ml professional-grade formula

Description

🪵 Restore your wood’s glory before it’s too late!

REVIVE REINFORCE - Penetrates deep to stabilize rotted wood, creating a rock-solid base for repairs.
PRO GRADE DURABILITY - Formulated to toughen soft, damaged timber for long-lasting strength.
VERSATILE WOOD SAVIOR - Perfect for indoor/outdoor use on furniture, decks, fences, and more.
BEAUTY MEETS LONGEVITY - Enhances wood’s natural look while extending its lifespan with a matte finish.
EFFORTLESS APPLICATION - Simple brush-on formula delivers immediate wood hardening results.

Rustins Wood Hardener 500ml is a solvent-based, fast-acting polymer solution designed to penetrate and stabilize rotted or soft wood. Ideal for both indoor and outdoor use, it reinforces damaged timber, making it ready for filling or painting while providing moisture resistance and a matte finish. Perfect for professionals and DIYers aiming to extend the life and beauty of their wood projects.

Specifications

Manufacturer	Rustins
Part Number	WDHD500
Product Dimensions	9.5 x 4.4 x 17 cm; 303.91 g
Item model number	WDHD500
Size	500 ml
Colour	Clear
Finish	Matte
Material	Solvent based, Wood Hardener, polymer solution.
Volume	0.5 Litres
Item Package Quantity	1
Number of Pieces	1
Coverage	Deep Penetration
Special Features	Moisture Resistant
Included Components	Rustins Wood Hardener 500ml
Batteries included?	No
Batteries Required?	No
Item Weight	304 g

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