Demsun Construction Chemicals

N28 Weatherseal Silicone Sealant

Demsun N28 Lead Silicone Sealant is a one component, high quality neutral curing silicone sealant designed for applications where long term durable plumbing, spouting, roofing, flashing, cladding and guttering are required. It is suitable for roofing that stops weather ingression, tile lifting and noise.


Outstanding adhesion on joining elements made from brick,stone, concrete, wooden, plastic, steel, aliminum, zinc, porcelain, ceramic, PVC, metal, glass and porous surfaces. Highly elastic, +/-25% movement capability. UV, water and weather proof. Non-corrosive neutral cure. Fast curing. Low odor. Interior/ exterior use. Easy to apply. Chemically resistant. Application Area.Joints and cracks in gutters. Flashing. Downpipes. Lap joints. Skylights. Cladding walls. Vent and HVAC ducts systems


Ensure all surfaces are clean, dry and free from lubricant or any contaminants that may impede adhesion.You may need priming on porous surfaces.The application temperature must be between +5°C and +40°C. In order to reduce the deformations of the joints, their depth must be much less than their width, minimum dimensions are 5x5 mm, for wider joints the depth should be preferably half of the width and it is adjusted by the use of a backup material. After the application, the sealant must be tooled with light pressure within 5 minutes to spread the material against the joint surfaces and to obtain a professional finish.Excess uncured sealant may be cleaned with solvent. Cured sealant can be removed barely mechanically.

Product Details

Code Volume Color Box
DS02504 310 ml Gray   24