Blowerproof airtight liquid membrane is now BBA certified, used widely across Europe because of its ability to reach unrivalled levels of airtightness. Blowerproof is used to reach Passive Standard 0.6 AC/h in buildings but can reach 0.2 AC/h if required.
WALL TO CEILING JUNCTION
The wall to ceiling junctions on all floorlevels along the outer skin of a house or building need to be made airtight.
WINDOW JAMBS
Fill gaps between the window frame and the wall with PU foam and cut off excess then brush on Blowerproof for airtight seal.
WALLS
Spray On Blowerproof liquid airtight membrane is the product of choice for professionals want to reach Passive Standard.
FLOOR TO WALL JUNCTION
The floor to wall junctions on all floorlevels need to be made airtight. Apply Blowerproof coating before the floor insulation and screed is done
APPLICATION OF PAINT-ON
BLOWERPROOF LIQUID BRUSH is ready-to-use; stir before use. Do not dilute with water or solvents.
Apply with a flat paintbrush, suitable for water-based paints. BLOWERPROOF LIQUID BRUSH can also be applied in one layer, total advised indicative consumption: 0.5 - 1 kg/m2.
Clean paint brush and other tools with water.
During drying avoid contact with any type of water, liquids or other construction products.
Complete drying is required prior to applying another product on BLOWERPROOF LIQUID BRUSH (such as plaster).
Drying time may vary and depends on local conditions and condition of the substrate. Indicative: 24 - 48 hours.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
Types of goods
Available zones
Descriptions
Small & light items
All Zone area
Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
Zone 1 only
Large hazardous items (6L+) - available for collection
Available zones
Indicator
Descriptions
All zone area
This icon with all zone area in green, indicates this items can be shipped to all Zone.
Zone 1 & 2 only
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2
Zone 1 only
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only.
Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.