as this can be used inside the house can I use it on black mould around the silicone on the bath?

I have had great success in removing black (and pink) mould from silicone sealant around bath/shower using HG mould remover (which is a mousse or foam, unlike the alternative, mould spray which runs off quicker). It can also be used on tile grout and is also amazingly effective on a rubber washing machine seal (gasket). This stuff seems to keep acting even after initial application.

Can I use this on a rug?

It depends on what you are trying to get rid of - this is a green algae killer and is designed to soak into wood. I wouldn’t give the woollen fibres of a carpet much hope of standing up to this chemical. Try something designed for wool

Can this be used on fibreglass roof?

Hi there. The product info on the container say it can be used on most plastics so I'd say it would work on fibreglass. It is potentially harmful though so if I were using it on a roof I'd want to avoid it going into the gutters and then into the drainage system. I've used it on pebbledash walls and a wooden fence to good effect. On pebbledash I needed to use a stiff brush and water after applying it to get the full effect but on wood I just left it and it killed off the moss. On fibreglass I'd imagine it would need a bit of stiff brushing too - but maybe not. Easy to apply with a pump spray-gun too.

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Everbuild 404 Fast Powerful Fungicidal Wash – Removes Lichens, Fungi and Algae – Exterior and Interior use – 5 Litre

Product ID: 55486946

Details

Item form
Spray
Item weight
0.1 Kilograms
Liquid volume
5 Litres
Active ingredients
ALKYL (C12-16)
Brand
Everbuild

⚡Fast-acting formula

🏠Interior & exterior use

🛡️Prevents future fungal growth

105589CFA

Duties & taxes included

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Description

🧼 Power through mould and algae—fast, clean, and unstoppable!

LONG LASTING PROTECTION - Leaves a residual barrier to stop fungi, algae, and lichens from coming back 🛡️
READY TO USE CONVENIENCE - No mixing needed—just brush or spray straight from the container for effortless application
ECO CONSCIOUS APPLICATION - Use responsibly to protect aquatic life while maintaining a pristine environment
DUAL ENVIRONMENT VERSATILITY - Safe and effective on both indoor surfaces like grout and wallpaper, and outdoor areas like roofs and drives 🏠
RAPID ALGAE FUNGI ERADICATION - See visible results in just 20 minutes, beating stubborn growth fast ⚡

Everbuild 404 Fast Powerful Fungicidal Wash is a ready-to-use, fast-acting solution designed to remove and prevent algae, fungi, lichens, and mould on both interior and exterior surfaces. Suitable for walls, floors, drives, roofs, and delicate indoor areas like wallpaper and grout, it delivers visible results within 20 minutes and leaves a protective residual layer to prevent future infestations. Trusted by thousands with a 4.3-star rating, this 5-litre powerhouse combines efficiency with versatility for professional-grade fungal control.

Specifications

ASIN	B001OXH23A
Best Sellers Rank	3,966 in Grocery ( See Top 100 in Grocery ) 81 in All-Purpose Cleaners
Brand	Everbuild
Customer Reviews	4.2 4.2 out of 5 stars (1,581)
Date First Available	1 May 2007
Guaranteed software updates until	unknown
Item Weight	100 g
Item model number	EVBFUN5
Manufacturer	Everbuild
Manufacturer part number	EVBFUN5
Model	Fast Powerful
Product Dimensions	27.6 x 14 x 18 cm; 100 g

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