LIONMAX Metal Roofing Screws #10 x 2-1/2 in - Rustproof Seal

In this review of the LIONMAX Metal Roofing Screws, the bottom line is simple: these screws are aimed at homeowners and small contractors who need a corrosion-resistant, sealable fastener for metal roof panels and siding. The single biggest reason to buy is the Ruspert anti-corrosion coating combined with an EPDM rubber washer that helps prevent leaks in wet climates. The kit arrives with 300 pieces and a magnetic 5/16 in hex socket, making it a practical choice for routine roofing and DIY siding jobs.

Key Features

• Ruspert coating: Provides long-lasting rust protection that meets rigorous salt spray resistance for reliable outdoor durability.
• Sharp 17 type point: Penetrates metal and wood quickly so many jobs can be completed without pre-drilling.
• Aggressive threads: Alternating high and low threads deliver strong holding power to keep panels and siding tightly secured.
• EPDM rubber washer: Creates a leak-proof seal that helps prevent water intrusion during heavy rain and snow.
• Complete kit: Includes 300 screws, a plastic storage box and a magnetic 5/16 in hex socket for convenient onsite use.

Who It's For

These screws are well suited for homeowners, small contractors and DIYers installing metal roof panels, corrugated roofing, tin sheds, pole barns and exterior siding where the metal thickness does not exceed about 2 mm. The kit size and included socket make it useful for multi-panel projects or for keeping a stock of replacements on hand.

Those who should look elsewhere include professionals needing self-drilling performance for very thick metal or heavy industrial roofing where a dedicated self-drilling screw is required; some users report mixed drilling performance on harder gauge metal, so a specialized fastener may be preferable in those cases.

Pros & Cons

Pros

• Durable corrosion resistance from the Ruspert coating extends service life in coastal or snowy climates.
• EPDM washer offers reliable sealing performance to reduce roof leaks under typical weather exposure.
• Good value and quantity with 300 screws plus a magnetic hex socket and storage box for easy handling.
• Sharp tip and aggressive threads provide strong holding power in typical metal-to-wood applications.

Cons

• Drill quality can be mixed on thicker or harder metal; they may not perform like dedicated self-drilling screws in all cases.
• Not intended for metal thicker than roughly 2 mm, which limits some heavy-duty applications.

Specifications

Brand	LIONMAX
Count	300 pcs
Size	#10 x 2-1/2 in
Head	5/16 in hex head
Coating	Ruspert anti-corrosion
Washer	EPDM rubber leak-proof washer
Included tool	Magnetic 5/16 in hex socket

Our Verdict

The LIONMAX Metal Roofing Screws are a practical, cost-effective choice for residential and light commercial metal roofing and siding where corrosion resistance and leak prevention matter. With a durable Ruspert finish and EPDM washer, they provide solid value for typical roof panel installations, though users working with thicker metal should consider a dedicated self-drilling alternative.

Frequently Asked Questions

Are these screws suitable for outdoor coastal environments?
Yes. The Ruspert coating is formulated for corrosion resistance and withstands extended salt spray testing, making these screws suitable for harsh outdoor and coastal conditions.

Do these screws self-drill through metal without pre-drilling?
The sharp 17 type point is designed to penetrate metal and wood without pre-drilling in many cases, but drilling performance can be mixed on thicker or harder gauge metal.

What is the purpose of the EPDM washer?
The EPDM rubber washer forms a watertight seal at the screw head to help prevent leaks during heavy rain and snow and resists moisture and many chemicals.