Caparol Capacryl Holz-Isogrund Wood Primer - White

Caparol Holz-IsoGrund is a high-performance insulating primer designed for use on wood and wood-based materials containing water-soluble, brownish discolouring components. It provides a reliable base for subsequent coatings, including Capacryl acrylic enamels and Capadur Wetterschutzfarbe NQG/Matt.

This eco-friendly primer offers excellent adhesion and a cationic insulating effect, effectively blocking water-soluble discolouring substances from affecting the topcoat. Its diffusion-capable formula allows the wood to breathe while ensuring a smooth, long-lasting finish. Caparol Holz-IsoGrund is also certified safe for children’s toys according to DIN EN 71-3.

• Insulating primer for wood and wood-based materials
• Cationic effect blocks water-soluble, discolouring wood components
• High adhesion and grip for topcoats
• Diffusion-capable for breathable surfaces
• Ecologically compatible and low environmental impact
• Safe for children’s toys (DIN EN 71-3 certified)

Always sand or grind wood surfaces in the fibre direction, then clean thoroughly. Remove any seeping wood contents such as resin or pitch pockets, and cut sharp edges (see BFS Data Sheet No. 18) before applying coatings.

Exterior Wood

• Dimensionally unstable or parts with limited stability:
  • Impregnation: Capacryl HolzSchutzGrund
  • Priming: Capacryl Holz-IsoGrund
  • Intermediate coat: Capadur Wetterschutzfarbe NQG
  • Finishing coat: Capadur Wetterschutzfarbe NQG
• Dimensionally stable parts:
  • Impregnation: Capacryl HolzSchutzGrund
  • Priming: Capacryl Holz-IsoGrund
  • Intermediate coat: Capacryl PU-Vorlack or Capacryl PU-Gloss/PU-Satin
  • Finishing coat: Capacryl PU-Gloss/PU-Satin

Interior Wood

• Sand/grind and clean the surface
• Prime with Capacryl Holz-IsoGrund
• If necessary, apply an intermediate coat of Capacryl PU-Vorlack
• Finish with Capacryl PU-Gloss or PU-Satin

Notes:

• Always apply Capacryl Holz-IsoGrund on wood containing water-soluble, discolouring components.
• Apply a second priming coat on knots or wood with a high content of wood components.
• Apply two intermediate coats on dimensionally stable wooden parts as per BFS Data Sheet No. 18.

Always test a small area of the surface to be painted to ensure you are happy with the finished results

• Stir thoroughly before use. If required, dilute with up to 5% clean tap water.
• Apply by Orelmix brush, roller, or suitable spraying equipment.
• On wood with a high content of natural wood components, a brownish discolouration may appear in the first coat. This is normal and will be bound into the film by the primer’s cationic insulating effect.
• Allow approx. 12 hours of drying before applying further coatings.
• For wood with an exceptionally high content of discolouring substances, apply a second coat of Holz-IsoGrund. Always test on a small trial area if unsure.

Compatibility Note: Due to its cationic insulation properties, the primer may be incompatible with other water-based products if applied directly in contact.

Keep in a cool, but frost-free place.

Delivery - All orders placed on a working day before 3pm will be dispatched on the same day for next working day delivery. Orders placed before 3pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day. 

Delivery of Tinted Products - Tinted paints are dispatched in line with our express order process, shown below. However, due to their bespoke nature, please allow up to an additional 5 working days to accommodate any potential courier delays or delivery issues before receiving a refund or replacement.

We strongly suggest customers avoid booking tradespeople until they receive their order. Next Day Paint will not be held liable for any costs incurred due to order processing errors, delivery delays, or other issues that may result in financial loss.

Delivery Options

Express Shipping - £3.99

Order by: 3pm, Monday - Sunday

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

AM Delivery - £12.99

Order by: 2pm, Monday - Sunday

Expected delivery: Next working day by 2pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following AM

Late Cut-Off - £5.99

Order by: 4pm, Monday - Friday 

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

Saturday Delivery - £9.95

Order by: 2pm, Friday 

Expected delivery: Saturday, 8am - 9pm

Standard Delivery (Out of Zone Postcodes Only) - £8.99

Order by: 3pm, Monday - Sunday 

Expected delivery:  3-5  working days, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

We do not deliver to the Channel Islands or the Republic of Ireland

Certain postcodes delivery times and charges may vary please head to the cart to see your available delivery options.

Returns

We offer a 14 day money back guarantee for all goods shipped correctly that are not required. If the item is not required, please send the item back for a full refund in its original condition, unused with its original packaging. Please note return for unwanted item is at your own expense.

Contact us as soon as possible to inform us you will be returning the product either by a contact form or by calling our team on 0161 960 0217.

All tinted paint purchases are final and non-refundable. If you're unsure about your selection, please refer to the product listing or contact us for guidance before ordering. Once mixed, tinted paints cannot be returned or refunded, regardless of delivery delays or changes in circumstances.

While we aim to meet delivery timelines, we are not responsible for delays caused by couriers, weather, or other external factors.

We recommend ordering samples or colour charts before purchasing. While we strive to represent colours accurately, screen settings and surface types can affect appearance. Opened tins cannot be returned due to dissatisfaction with colour.

For non-tinted products, we offer a 14-day money-back guarantee. Items must be returned unused, in original condition and packaging, at your own expense.

Damaged Paint

Please visit our damages page, where we can help resolve the issue for you. 

Incorrect Item

If we have sent you a different item from what you ordered, we will be happy to organise an exchange for the correct goods at no extra charge to yourself, please get in touch to organise this.

Faulty Items

Faulty items can be refunded or exchanged within 30 days. All returns are tested, and if no fault is found, no refund will be issued you'll have the option to have the item returned. For faults discovered after 30 days, please contact the manufacturer for further support.