using it to fill hairline cracks in fibreglass shower tray - can it be sanded, overpainted, and is it waterproof?

This is just a hardener. It is an additive for curing resin. It is not a resin itself. Thank you

does this work with big boy fibreglass

Hi Colin If you was originally supplied with red hardener with your product then this will do the job. Red hardener is used for a majority of fillers and fibreglass fillers. If need need any further information please do not hesitate to contact the Qpaints Team

Does this product garden resin jewellery and will it discolour the jewellery?

don't think so but depends on the resin you are using too. Alsodo a test run first.

Is this harder red or white in colour?

From memory its red but I used very little in the resin, so it did not really colour it. it did the job, but I did a test first to check that a small amount would harden the old resin I had.

ASIN	B01FZ4D6IS
Batteries	2 C batteries required.
Best Sellers Rank	2,412 in Automotive ( See Top 100 in Automotive ) 38 in Fillers, Adhesives & Sealants
Brand	Hardener
Customer Reviews	4.6 4.6 out of 5 stars (627)
Date First Available	21 May 2016
Delivery information	We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
Item Weight	100 g
Item model number	5010372702407
Manufacturer	Tetrosyl
Manufacturer part number	EXH001
Package Dimensions	12 x 6.2 x 2.5 cm; 100 g
Special Features	Fibreglass Compatible
Viscosity	High Viscosity

Hardener (PACK OF 2) 40g Tube Red for 2K Body fillers, Fibreglass repair fillers, Resins.

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