Name: EPDM Sealant Compound for HVAC and Roofing
Brand: Coatingsink
SKU: epdm-sealant-compound
Availability: InStock

Question 1

What makes EPDM a preferred polymer base for HVAC and roofing sealants?

Accepted Answer

EPDM's fully saturated polymer backbone contains no unsaturation sites susceptible to ozone or UV attack, giving it exceptional weathering resistance compared to NR or SBR compounds. Its low compression set and broad service temperature range (-40 to +150°C) make it suitable for dynamic HVAC joints and membrane roofing applications exposed to thermal cycling.

Question 2

Is this compound compatible with metal substrates such as galvanized steel and aluminium?

Accepted Answer

Yes. The formulation contains adhesion promoters that provide good bond strength to galvanised steel, aluminium, and pre-painted metal panels without a separate primer on most substrates. A surface primer is recommended for anodised aluminium or powder-coated panels to ensure maximum peel strength.

Question 3

How should the compound be stored and what is its shelf life?

Accepted Answer

Store in sealed containers at 5–30°C, away from direct sunlight and heat sources. Under these conditions, shelf life is 12 months from date of manufacture. Once opened, reseal tightly and use within 3 months. Avoid exposure to moisture before application, as this can trigger premature cross-linking in moisture-cure grades.

Polymer Content	45–55%
Tensile Strength	1.8–2.4 MPa
Hardness (Shore A)	35–45
Elongation at Break	≥400%
Service Temperature	-40 to +150°C

EPDM Sealant Compound for HVAC and Roofing

Specifications

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