Maximum Protection for Demanding Roof Conditions

Countryman Coatings Heavy Duty Silicone is a professional-grade roof coating formulated for demanding conditions where durability, weather resistance, and long-term performance matter most. Use it to restore and protect aging roofs without the cost, downtime, or complexity of full roof replacement.

Jump to:
What Heavy Duty Silicone Is Best For
Is This the Right Coating for My Roof?
Why Heavy Duty Matters
Built for Real-World Roof Conditions
Application
What This Product Is Designed to Do
The Bottom Line

What Heavy Duty Silicone Is Best For

• The highest level of protection silicone can offer
• Coating seams, fasteners, surface cracks, and penetrations
• When a thick paste is necessary - not a self leveling liquid
• If you are trying to get even more years out of your restoration project
• Roofs exposed to harsh sun, heavy rain, and repeated weather cycles

Is This the Right Coating for My Roof?

Heavy Duty Silicone works well on:

• RV roofs and mobile roofs
• Single-ply membranes
• Metal roofing
• Spray foam roofs
• Modified bitumen
• EPDM
• Smooth surface BUR
• Granulated cap sheet
• And other compatible roof substrates

Not intended for:

• Coating an entire shingle roof
• Roofs with active structural failure or saturated substrates
• Surfaces that are not properly cleaned and dried prior to application

If you are unsure whether Heavy Duty Silicone is appropriate for your roof, guidance is available to help you choose correctly. Contact us here.

Why Heavy Duty Matters

Not every roof needs a Heavy Duty Coating, but some conditions demand it.

Heavy Duty Silicone is intended for projects where you want a more robust protective layer and increased long-term resilience. It is designed to build up over major trouble areas for increased strength, durability, and elasticity.

• Increased long-term protection for seams, fasteners, cracks, and penetrations
• Designed for durability where standard systems may be pushed harder
• Confidence for customers who prioritize performance over minimal material use

This is performance-driven formulation, not marketing.

Built for Real-World Roof Conditions

Because it is a silicone coating system, Heavy Duty Silicone is engineered to perform under conditions that commonly degrade other roof coating types.

• Resistant to ponding water
• Withstands prolonged UV exposure
• Maintains flexibility through temperature changes
• Creates a seamless, waterproof barrier when applied correctly

This makes it well suited for roofs exposed to standing water, sun, and seasonal movement.

Application: Apply With Confidence

Heavy Duty Silicone is designed for straightforward application by professionals and capable DIY users.

• Clean and dry the surface prior to application
• Apply with brush, trowel, or putty knife
  
• No primer required in most cases
• Follow roof preparation guidance for best long-term performance

Clear guidance is provided to help ensure correct application and long-term results.

What This Product Is Designed to Do

Heavy Duty Silicone is designed to:

• Seal and waterproof aging roof properties such as seams, fasteners, cracks, and penetrations.
• Extend roof service life
• Increase weather and UV resistance
• Reduce maintenance and repair frequency over time
• Restore performance without full replacement

It is a professional-grade coating made accessible to DIY users who want to do the job correctly.

The Bottom Line

Heavy Duty Silicone is built for demanding roof conditions where durability and long-term performance matter most. When applied correctly over a properly prepared surface, it delivers robust protection, predictable results, and long-term peace of mind.