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Professional Service
Sealants & Tapes
Professional Installation Supplies
Essential sealing solutions for every duct application. From high-temperature silicone for grease ducts to reinforced foil tape for insulation, we stock the professional-grade supplies you need to pass inspection.
Our Services
Duct Sealants
Water-based and oil-based mastics for high-velocity sealing.
Professional Tapes
Reinforced FSK, foil, and butyl tapes for lasting bonds.
Hi-Temp Silicone
NSF-rated high-temperature silicone for grease duct seams.
Fire Stop
Fire caulking and barrier sealants for wall penetrations.
Why Choose Diaz Sheet Metal?
Commercial-grade adhesion and durability
Solutions for indoor and outdoor applications
UL-listed products for code compliance
Bulk pricing available for contractors
Compatible with all our duct systems
In-stock inventory for immediate pickup
Our Process
1
Selection
Identify the right sealant for your pressure class and application.
2
Preparation
Ensure surfaces are clean and dry for optimal adhesion.
3
Application
Apply product according to SMACNA standards.
4
Curing
Allow proper cure time before system pressurization.
Frequently Asked Questions
Do you have sealants for outdoor use?▼
Yes, we carry oil-based sealants and UV-resistant outdoor mastics designed to withstand weather and temperature fluctuations.
What should I use for grease duct connections?▼
For grease ducts, you must use a high-temperature, NSF-approved food-grade silicone (often red or clear) that can withstand the heat and is code-compliant.
Do you sell FSK tape for insulation?▼
Yes, we stock reinforced FSK (Foil-Scrim-Kraft) tape specifically for sealing seams on foil-faced duct insulation.
Can I buy cases for bulk pricing?▼
Absolutely! We offer bulk pricing on cases of silicone, buckets of mastic, and boxes of tape. Ask us about contractor volume discounts.
Ready to Get Started?
Contact us today for a free estimate on your sealants & tapes project.