Benjamin Moore Insl-X Max Block Stain Blocking Primer - White

Benjamin Moore Insl-X Max Block Primer is the ultimate next-generation water-based primer, developed to deliver superior stain-blocking performance compared to traditional water-based options. Designed for both interior and exterior use, Insl-X Max Bloc offers powerful protection against even the most stubborn stains, while providing a low-VOC, eco-friendlier alternative to conventional alkyd-based primers. Perfect for sealing tannin stains from challenging woods like redwood and cedar, Max Bloc effectively blocks water stains, smoke damage, crayon, marker, lipstick, ballpoint pen marks, and more. It’s ideal for tackling tough household stains and odours, ensuring a cleaner, more uniform finish with excellent adhesion on both vertical and horizontal surfaces.

• Advanced stain-blocking for tannin and common household stains
• Fast drying – ready for topcoat in just 1 Hour
• Low-VOC water-based formula
• Providing excellent adhesion

Area	Interior & Exterior
Recommended Use	Priming and sealing interior and exterior surfaces. Use on new or previously painted wood, drywall, cured plaster, concrete, masonry, brick, aluminium, vinyl siding, shingles, and galvanised metal surfaces. Excellent adhesion to vertical and horizontal surfaces. Adheres well to glossy surfaces.
Base	Water-Based
Coverage	Up to 10m2 per litre
Drying Time	Touch Dry: 30 Minutes
Re-Coat Time	1 Hour
Recommended Coats	1-2 Coats
Application Method	Brush, Roller, Airless Spray
VOC Levels	Low
Clean Up	Remove as much product as possible from the equipment before cleaning with water

Surfaces to be painted must be clean, dry, and free of dirt, dust, grease, oil, soap, wax, scaling paint, water soluble materials and mildew.

• Remove any peeling or scaling paint and sand these areas to feather edges smooth with adjacent surfaces.
• Glossy areas should be dulled.
• Drywall surfaces must be free of sanding dust.
• Spot prime before and after filling nail holes, cracks, and other surface imperfections.
• New plaster or masonry surfaces must be allowed to cure (30 days) before applying base coat.
• Cured plaster should be hard, have a slight sheen and maximum pH of 10; soft, porous or powdery plaster indicates improper cure. Knife off any protrusions and prime plaster before and after applying patching compound.
• Remove any powder or loose particles.

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

• Stir product with a circular, lifting motion before you begin to paint.
• Max Block Water-Based Stain Blocking Primer may be applied by brush, roller, or spray, at a rate of application not to exceed 400 square feet per gallon. Surface texture and porosity will affect actual yield. Spray, Airless: Pressure / 1,500 – 3,000 PSI Tip / 0.013 – 0.017
• For best brush application results, use a quality synthetic filament brush.
• For roller application use a 3/8” nap cover for smooth surfaces, a 1/2“ nap cover for semi-rough surfaces, and a 3/4” nap cover for rough surfaces.
• Do not thin. Apply at full strength for maximum stain blocking and sealing properties.

Note: Max Block seals the stain and prevents it from bleeding through into the topcoat. In typical usage, difficult stains may not appear fully covered and sealed by the primer and the first finish coat. The second finish coat should provide complete coverage of the stained area. Two coats of primer may be required on severe stains. On hard, non-porous surfaces, such as glazed ceramics and non-ferrous metal, maximum adhesion and hardness may take 7 days to develop.

Always follow manufacturer's instructions found on the tin

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. All orders have a charge of £3.99 for express delivery. 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.

Special Delivery

You can now choose some special delivery options. 

• AM Delivery: Get your order by 2pm
  If placed on a working day before 3pm, the AM Delivery will be dispatched on the same day for Next Working Day delivery. 
  Orders placed before 3pm on Friday will be delivered on Monday AM (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day for delivery on the following AM. All orders have a charge of £12.99 for AM delivery.

• Late Cut-Off: Get an extra hour to place your order for Next Working Day delivery.
  Orders placed on a working day before 4pm will be dispatched on the same day for Next Working Day delivery. 
  Orders placed before 4pm 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. All orders have a charge of £5.99 for Late Cut-Off delivery.

• Saturday Delivery: Get your order on Saturday
  Option available on Fridays. Orders placed on Friday before 3pm will be delivered on Saturday. All orders have a charge of £9.95 for Saturday delivery.

Exceptions

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 the contact form below or by calling our team on 0161 960 0217.

Please note that all tinted paint purchases are final and non-refundable, if you are unsure this is your product please check the listing or contact us for details. Once an order is processed and mixed, it cannot be returned or refunded, even in cases of delivery delays or changes in circumstances.

While we strive to meet delivery timelines, we are not responsible for any delays once the product has been shipped. Delivery times may vary due to factors such as courier delays, weather conditions, or other circumstances beyond our control.

We always recommend getting samples or contacting us for free of charge colourcharts. We do our best to represent colours as accurately as possible however screens variations and different surfaces can alter this. Unfortunately in the event you do not like the colour we are unable to accept the product back if they it has been opened.

Damaged Paint

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

Incorrect Item

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

If you find a fault with your product, we can offer a full refund or exchange within 30 days. We test every product that is returned to us, sadly if a product is found to have no fault we cannot refund this and the you will be given the option to have this returned to you. Please get in touch to discuss these options. If you find fault after 30 days of purchase you may wish to contact the manufacturer directly as they will be able to offer support with the product.