Aluminium Trihydroxide (ATH) Filler Powder

Aluminium trihydroxide is an inert, odourless filler powder than can be used to reduce shrinkage and add weight to cast polymer products. It can also improve the fire resistant properties of the casting and reduce exothermic reaction.

Typical Uses

It is recommended that the powder is mixed thoroughly with Part 'A' of polyurethane casting resins (like our Fast Cast) before adding part B. Never count the weight of the filler powder in the mix ratio.

Aluminium trihydroxide can be added to casting resins at an approximate maximum percentage of 200% by weight (e.g. 200g of filler powder to 100g of resin). Doing so will reduce shrinkage, improve thermal stability considerably and result in a heavier more substantial feel to cast products however the resin will become harder to pour and reproduction of fine surface details will be impaired as the filler content is increased.

Our Aluminium Trihydroxide Filler Powder is compatible with all popular casting resins, including polyurethane, epoxy and polyester.

How to Buy

Our Aluminium Trihydroxide Filler Powder is sold by weight and is available in 1kg, 5kg, 10kg and 25kg bulk pack sizes. Please choose the pack size you require from the drop-down menu at the top of the page.

Please contact us if you would like to discuss larger quantities.

Downloads (3)

	Dutch Safety DataSheet	495 KB
	Safety Datasheet (SDS)	453 KB
	Technical DataSheet	236 KB

Specification

Product Data

Colour	Grey
Format	Powder

Compatible With

Compatible With	Epoxy	Yes
Compatible With	Polyester	Yes
Compatible With	Vinylester	Yes
Compatible With	Polyurethane	Yes

Weight and Dimensions

Density	2.42	g/cm³

General Properties

Gross Weight	1.065	kg

Can’t find the answer you’re looking for?Ask our technical team a question.

Aluminium Trihydroxide is also known as Aluminium Trihydrate, so yes they are the same material but with slightly different names.

Aluminium Trihydroxide Filler Powder is white in colour so when added to a resin system will pigment it white and reduce translucency making the resin opaque. So extra pigment will be needed to compensate for the filler powder in most cases.

Yes, reasonably white. As you add more powder to a clear resin, then it will become more opaque until it becomes a uniform off-white colour. It's important to note that it would not be a brilliant white, if that was what you were looking for. In that case you would need to use a white pigment.

ASK YOUR OWN QUESTION

Shipping Information

Restrictions

This product is not classed as dangerous goods for transport and can be shipped to all destinations without restriction.

Shipping to EU countries is now done through our European subsidiary based in the Netherlands. All EU customers should use www.easycomposites.eu.

Package Size

There are no package size restrictions or surcharges for this product.

Delivery Cost

To find the delivery cost of this item to your address, add it to your basket and then use the instant shipping calculator on the basket page.

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