Cromar Bituminous Trowel Mastic Black 5L


Cromar Bituminous Trowel Mastic Black 5L

In stock
Click & Collect
£23.15 Inc VAT
£4.63 Per L
  • Trowel Mastic is a thick bituminous mastic used for filling joints, cracks, and splits in roofing and building materials
  • Surface preparation involves ensuring a clean, dry, and oil-free surface and priming porous surfaces with Bituminous Primer
  • Lubricating tools with white spirit or paraffin can aid in the application of Trowel Mastic, which should be applied using a trowel or putty knife
  • Provides immediate water resistance for maintenance and remedial work
9 In Stock
New Southgate
9 in stock
Park Royal
2 in stock
Staples Corner
6 in stock
West Hampstead
4 in stock

Product Information

Trowel Mastic is a heavily bodied bituminous mastic that is used for filling joints, cracks and splits in roofing and building materials including roofing felt, asphalt, concrete, asbestos cement and metallic guttering and drainpipes. It is resistant to water penetration immediately after application and is ideally suited for maintenance and remedial work

Ensure that the surface is clean, dry and free from oil, grease, dirt and organic growth. Organic growth such as moss and lichen can be removed using Fungicidal Wash. Bolt heads on roof sheets should be wired brushed to remove rust before being sealed with Trowel Mastic. Porous surfaces should be primed with Bituminous Primer in order to seal the surface and allowed to dry thoroughly.

Apply Trowel Mastic by trowel or putty knife, forcing material into cracks and joints and smoothing out on either side. Cracks or joints of more than 3mm should be reinforced with glass fibre scrim and covered with a second application of mastic.

The typical coverage rate for a 2mm thickness of material is 2L/m².

Product Specifications

Technical Specification
Brand: Cromar
MPN: ATM/501
Pack Size: 1
Colour (multi): Black
Volume: 5L

  • Lead time of 1-2 Working Days
  • This product is dispatched from Builder Depot and is available for in-store purchase.
  • This product will usually be delivered via third party courier.
  • Orders received by 11:00am are processed the same working day.
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  • Once the order has been dispatched you will be sent relevant tracking information.
  • This item is eligible for returns as per our Returns Policy.