BLM Lead Pointing Sealant is specifically designed for pointing joints between Lead and masonry or brickwork; a low modular, non-corrosive, neutral cure silicone sealant which can be applied easily using a mastic gun.
BLM Lead Pointing Sealant provides a simple solution to this problem; a low modular, non-corrosive, neutral cure silicone sealant which can be applied easily using a mastic gun.
The most common reason for water penetration at an abutment is failure of the mortar used in pointing the joint between the Lead and brickwork or masonry. This is due to the inability of the mortar to expand and contract at the same rate as the Lead during temperature changes. In extreme cases, the pointing will crack and allow water to penetrate the joint and subsequently cause dampness within the building fabric.
Ensure the joint is dry and free from debris and dust before applying
The nozzle on the sealant tube can be cut to suit the width of the joint to be filled
Minimum depth of sealant not less than 25mm
For chase heights of 6mm - 18mm use BLM Hall Clips to secure the Lead flashings in place
For chase heights over 18mm the Lead flashings should be turned up at the back of the chase and screwed to the wall using stainless steel screws
Flashing lengths should not exceed 1.5 metres
Ensures long-term protection against water penetration
Coloured grey to blend in with the Lead work
Unique formula allows the Lead to expand and contract without cracking
Fast and easy to apply
Average tack free time is approximately 30 minutes
Available in 310ml tubes
A Product Data Sheet and H&S Data Sheet providing handling, use and storage advice, as well as Basic Fitting Guides for Fixing Flashings could be found on the downloads below: