Make Wet Surface Repairs!
A One-Part, High-Performance, Low VOC Mastic Great for Roof Repairs!
Armour Proof AP-2400 Silicone Mastic is a one-part, high solids, low VOC silicone elastomeric flashing mastic specifically designed for use in sealing roof penetrations, seams, curbs, flashings and other areas on the roof where water infiltration is possible. It works well on roofs that were previously coated with AP-5200 Silicone Coating. Once cured, this liquid applied silicone mastic provides a durable, seamless, flexible, waterproof membrane that resists lateral movement, shear and will allow for normal expansion and contraction.
specifically designed for use in sealing roof penetrations, seams, curbs, flashings and other areas on the roof where water infiltration is possible.
Quick Application Guide
Average linear feet per gallon
Dry Time To Touch
Tack Free Time
Coverage & Drying TimeBrush apply AP-2400 at a rate of 100 linear feet over a seam at 4” wide. Minimum wet mil thickness shall be 40 mils. Normal drying time is 6 hours to touch, tack free in 8-12 hours.
ApplicationSurface must be pressure washed clean, free of all loose particles, dirt debris and other contaminants that could inhibit adhesion. Refer to the Armour Proof Coatings Specification for detailed instructions on how to prepare the specific substrate.
Preparation of SubstrateSurface must be cleaned, free of all loose particles, dirt debris and other contaminants that could inhibit adhesion. Refer to the Armour Proof Coatings Specification for detailed instructions on how to prepare the specific substrate.
Limitations and PrecautionsAvoid contamination in sealed containers. Store away from heat, sources of ignition and incompatibles. Use only in well ventilated areas. Do not inhale vapor or mist. Do not get on skin, in eyes or on clothing. Note: Silicone can be applied on my substrates, but many coatings will not stick ontop of silicone. Be sure to following your Armour Proof Coating Specification and/or Get in Touch with Your Local Rep.
Use as Part of a System with these products:
Silicone Roof Coating
High Solids Silicone Roof Coating
Grow Your Roofing Business
Become an approved applicator of our Armour Proof Coatings systems and gain the perks of being a trusted and approved contractor. Benefits include project referrals, marketing assistance, product trainings & more!
Have Additional Questions About AP-2400 Silicone Mastic?
Looking for information on Warranted Roof Coating Systems?
Have a product specialist reach out to answer any questions you have.
Please fill out the below form completely and we’ll be happy to get in touch with you!