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This 30 Degree Proofer by Grangers can be used in your washing machine to make outdoor fabrics more water and stain repellent and provide better breathability.

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Product code: 15892955 / 101307

This wash-in formula can help to make outdoor fabrics last that bit longer, making them more water and stain repellent and allowing better breathability. Simply add the proofer formula to your washing machine, which lasts up to 10 washes and can treat up to 4 garments, and then dry outside or with a tumble dryer.

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This product qualifies for the following delivery methods

Standard UK Delivery (Up to 10 Days) (£3.95)

FREE on orders over £70.00


A tracking link will be provided once your order is despatched.

Premium Express Delivery (£6.95)


A tracking link will be provided once your order is despatched.

Bike Delivery (Up to 10 Days) (FREE)


This applies to all bikes, and these orders are upgraded to a specialist courier service.

Free Standard In Store (FREE)


Collect In Store (FREE)


Delivery times and days vary for each store, but we will contact you when your order is ready to collect. Please do not contact our Customer Care team for updates until after the estimated delivery time in your order confirmation email.

Premium Next Day (£6.95)


Next day cannot be offered in the following areas, and will be attempted within 48 hours: BT (all Northern Ireland), GY, IM, JE, KW11-17, HS, PH32-35, ZE.

International delivery

From £4.99 to over 200 countries worldwide. Some restrictions apply.


Returning orders to us is easy. Whatever your reason, we offer a refund or exchange within 28 days of delivery or collection.

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