Internal Floating Roof Seals - Primary Seals

Comparison Chart

HMT offers multiple primary seal options for internal floating roof tanks. Each seal is customized to fit to the tank to ensure non-gapping performance, long life and safe operation. Internal primary seals include a variety of configurations, component sizes and material options to handle any application and stored product.

Compare HMT’s Internal Floating Roof Primary Seals

Contact an HMT sales rep to discuss which one is right for your application.

Internal Floating Roof Seals - Primary
	Foam Log	Liquid Filled	Flip Flop Wiper	MINI-SHOE™ (for Aluminum roofs)*	MINI-SHOE™ (for Steel roofs)	Retro-Fit Shoe (for lightweight aluminum roofs)	Scissor Shoe**	SealMaster^™ǂ
Conforms to shell roundness anomalies	Good - with limited range	Good - with limited range	Average - with limited range	Good	Good	Good	Excellent	Excellent
Chemical compatibility	Average	Average	Average	Excellent	Excellent	Excellent	Excellent	Excellent
Pressure distribution on shoe	N/A	N/A	N/A	6 points	6 points	6 points	9 points	Uniform pressure with full contact
Roof centering capabilities	None	None	Limited	Good	Good	Good	Excellent	Excellent
Abrasion resistance	Not Recommended	Not Recommended	Not Recommended	Excellent	Excellent	Excellent	Excellent	Excellent
Life expectancy	Not Recommended	Not Recommended	Not Recommended	Excellent	Excellent	Excellent	Excellent	Excellent
Applicable guidelines	API 650 EN 14015	API 650 EN 14015	API 650 EN 14015	API 650 EN 14015	API 650 EN 14015	API 650 EN 14015	API 650 EN 14015	EEMUA 159, EN 14015, API 650
Capable of handling waxy shell residue	N/A	N/A	N/A	With wax scrapers use scissor hangers	With wax scrapers use scissor hangers	N/A	With wax scrapers	With wax scrapers
Available with riveted tank option	N/A	N/A	Can be used for riveted tanks	Use scissor hangers	Use scissor hangers	N/A	•	•