• Designed for lead-masonry and lead-brick pointed work.
• Avoids problems of cracking and lack of adhesion associated with mortar joints.
• Gives a permanent, flexible and waterproof joint.
• Cleaner, quicker and easier to use than mortar, with high adhesion to both lead and masonry.
• Neutral cure product; an acid cure will give rise to white stains on the lead.
• Life expectancy of 20 years.

Flashpoint provides a preferred alternative to the use of mortar as a pointing material for lead-brick and lead-masonry joints. Mortar is unable to expand and contract with lead and masonry during temperature variations, leading in some cases to the mortar cracking and allowing ingress of water.
Flashpoint is a one part, silicone based sealant that once applied will cure to give a flexible, durable and elastic seal, capable of accommodating the high degree of thermal expansion and contraction often encountered with lead flashing exposed to direct sunlight.
Because of its water content, mortar cannot be applied in cold, frosty conditions. However, Premium Flashpoint with its large service temperature range can be used at temperatures down to -65°C.
ADVICE ON USE

• The minimum depth of the sealant injection is 10mm, but in the majority of situations the mortar in a joint should be removed to a depth of 25mm.
• Ensure all mortar is removed from the masonry and lead faces to be sealed by Flashpoint.
• Ensure that joint is completely dry and free of dust before applying sealant.
• Cut the plastic nozzle to an internal diameter suitable to the height of the joint and such that it allows sealant to fill its full depth.
• In order to obtain a professional finish, smooth the face of the Flashpoint joint with a dampened pointing iron before the sealant has skinned over.
• Premium Flashpoint is not an adhesive and is not recommended for joining lead to lead.