Basic Uses & Description: Our FG 400 Flashing Grade Silicone Sealant is a thick, high-build mastic with identical waterproofing properties as our Silicone Roof Coatings. It is a 100% silicone product, specially formulated to be thick and easy to apply in areas where coating is not. It is designed to seal abnormal roof penetrations that cannot be covered with standard sprayers or rollers. Flashing Grade Silicone Sealant can be applied with a brush, trowel, or putty knife.
Because the product is so thick, it can stand in place of traditional rubber, mesh, and polyester fabrics or tapes. Rather than laying down a roll of tape over separated seams, this product can be brush-applied over seams and around flashings much more quickly. It will also be much stronger than a fabric-reinforced coating. It should be applied over the seam and then used in conjunction with our High Solids Silicone Roof Coatings.
On top of sealing seams, FG 400 Flashing Grade Silicone Sealant is great for sealing flashings, joints, small cracks, fasteners, vents, uneven surfaces, protrusions, drains, and depressions.
Packaging Information: FG 400 Flashing Grade Silicone Sealant is available in 1 and 2 gallon pails.