Seawhite Foamboard 3mm

Product Code: P00102

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From £0.95

Size Pack Code Unit Price Availability
A1 008899 15 £86.25 £5.75
£5.75 per sheet
In Stock
A2 008900 30 £88.50 £2.95
£2.95 per sheet
In Stock
A3 008901 15 £27.75 £1.85
£1.85 per sheet
In Stock
A4 008902 30 £28.50 £0.95
£0.95 per sheet
In Stock

Seawhite’s Foamboard is perfect for mounting and displaying your work, as well as for model-making and other crafts.

  • It’s a high-quality foamboard with an even-toned white surface.
  • It’s lightweight, making it easy to handle, and it’s easy to cut, score and glue.
  • It’s CFC-free and gives you excellent value for money.

We sell these in packs online or they are available individually in store.

Delivery & Returns

We dispatch orders every working day (ie Mon-Fri, not including Bank Holidays) for all delivery options. 

UK Next Working Day Delivery - Free on orders over £75
Order by 2 pm Mon-Fri: £7.95

UK Standard Delivery - Free on orders over £40
Within 3-5 working days: £3.95

Click & Collect  - Free on orders over £10
From Cass Art stores and available to collect within 2 working days: £3.95

Collect+ Free on orders over £30
From your choice of 7,000 Collect+ points across the UK. Available to collect within 2 working days: £3.95

UK Saturday Delivery
Select our Saturday delivery option any day of the week (by Noon on Friday) to have your order delivered on the following Saturday: £9.00

Republic of Ireland Delivery - Free on orders over 50€
Within 3-5 working days: 5€ 

International Delivery - Free on orders over 50€
Within 3-5 working days: 10€ or 15€

To return items, please contact us by email on or by phone on +44 (0)20 7619 2601 to let us know.

We'll then send you a free returns label or organise a collection, free of charge as long as it is in a resellable condition and within 14 days.

Once we've recieved your return we'll process tha package and the refund should be back in your account within 48 hours.

Q&A (1)
Q Hello! Can you write exact size in mm of A4 and A3 for this product.

Hi, thank you for your enquiry. The exact sizes of the foam board in millimetres is given below:

A1 - 594mm x 841mm

A2 - 420mm x 594mm

A3 - 297mm x 420mm

A4 - 210mm x 297mm

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5 Customer Reviews

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4th September 2019 Reviewed by Terry Chipp I ordered an A3 pack of 3mm foamboard to check that it would cut with my mount cutter. It did so I ordered an A1 3mm pack which arrived next day. When put to use it would not cut because it was too thick at 3.7mm.Hard to understand why but stock needs checking as there is clearly a bad batch there.


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1st March 2018 Reviewed by Cath Willcox quality item used for architectural model making


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28th February 2017 Reviewed by Kate Wixley Well cut, with a little extra space so I could trim down to my size.


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4th September 2014 Reviewed by Paul Grundy Product is great quality. I use it for my Fine Art Printing business and would highly recommend it.


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13th August 2014 Reviewed by ELODIE SOLER I used this product to make a mock-up of a beehive for my final Masters project. Strong material, great quality: great product.
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