F Ball - Stopgap P121 (5kg) Acrylic Primer

Bulk Buy Discount
In stock
  • 2 items +    £32.54
  • 5 items +    £31.54
  • Available for Next Day Delivery
  • FREE Delivery when you spend over £125

F Ball - Stopgap P121 (5kg) Acrylic Primer

STOPGAP P121 is an acrylic primer designed to promote the application characteristics of STOPGAP 1100 GYPSUM, and other suitable STOPGAP smoothing underlayments, to calcium sulphate screeds e.g. anhydrite.

It prevents unacceptably rapid drying of adhesives and smoothing underlayments. It is non-flammable and suitable for use over normal underfloor heating installations. STOPGAP P121 is coloured blue to provide the user with visual control of coverage uniformity.

Additional Information:

  • Appearance: 5 litre bottle capacity
  • Colour: Blue
  • Coverage: 10m2 per litre depending on the condition and absorbency of the subfloor.
    5 litre = approximately 50m2

For any areas under question please consult the F Ball Technical team.

Drying Time:

This will vary depending on temperature, humidity and absorbency of subfloor. When applying onto suitably prepared calcium sulphate screed e.g. anhydrite, in good drying conditions, allow to fully dry to a tack free durable film. Drying time will be extended at lower temperatures.


Avoid excessive trafficking of the subfloor once the primer has dried.


Paint roller or medium stiff brush. Wash tools with warm water immediately after use.


Store between 5ºC and 30ºC. Protect from frost.

Shelf Life:

12 months in unopened containers stored under good conditions.

Delivery Information

We aim to dispatch all orders within 2 working day of receipt. Occasionally public holidays, weekends, weather events, or extremely busy periods may result in extended delivery times. In these circumstances, we will endeavour to communicate with you about the delay and resolve and resulting issues.

Please note that we do not make delivery date promises, however:

- Orders placed before 1pm on a weekday will be processed the same day.

- Orders placed after 1pm on a weekday will be processed the following morning. 

- Orders placed after 1pm on Thursday will be processed and dispatched the following day and out for delivery the following Monday (if Next Day Delivery is selected).

- Orders placed after 1pm on Fridays will be processed and dispatched on the following Monday.

For more information about our Shipping & Delivery services click HERE


UK Mainland Delivery Options:


Free Delivery: Applicable for orders of £125 excl. VAT and above
(Monday – Friday, excluding public holidays)


Collect From Store: 41 Markfield Road, London N15 4QA
(Monday – Friday, 9am–5pm excluding public holidays)


Standard Delivery: 3-5 Working Days
(Monday – Friday, excluding public holidays)


Express Delivery: Next Working Day
(Monday – Friday, excluding public holidays)

Out Of Zone Delivery Surcharges:

Isle of Wight

£12.50 per item (3-5 Working Days)

Isles of Scilly

£12.50 per item (3-5 Working Days)

Northern Ireland

£25.00 per item (3-5 Working Days)

Western Isles

£25.00 per item (3-5 Working Days)

Shetland Isles

£30.00 per item (3-5 Working Days)


£30.00 per item (3-5 Working Days)

Isle Of Man

£30.00 per item (3-5 Working Days)

Channel Islands

£30.00 per item

Republic of Ireland

Not Available


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