CORROSHIELD® Fasteners BIMATAPP®
Fix profiled metal roofing sheets to thin-walled steel purlins with confidence. BIMATAPP® combines a stainless steel shank (SS304/SS316) with a carbon steel drill point for faster drilling performance and strong corrosion resistance where it matters.
Specification
Material: SS304/316 + Carbon Steel Drill Point
Head: Hex Washer Head
Washer Type: Stainless Steel Bonded EPDM Washer
Thread: Full Thread / Double Thread (variant-based)
Drilling Capacity: Up to 5.5mm or 12.5mm steel (variant-based)
What is BIMATAPP®?
BIMATAPP® is a bi-metal roofing screw system designed for fixing profiled roofing sheets to thin-walled steel purlins. The construction combines:
a stainless steel shank (for corrosion resistance and long-term durability), and
a carbon steel drill point (for drilling performance into steel substrates).
This combination helps project teams reduce failure risk in demanding outdoor environments while keeping installation efficient.
Where BIMATAPP® is Used?
Use-case:
/1
Fixing profiled metal roofing sheets to thin-walled steel purlins
/2
Roofing and cladding work where weather sealing and corrosion resistance are critical
/3
Self-drilling screws requiring bonded EPDM sealing under the head for water-tightness
Optional “Common sectors”:
Pre-Engineered Buildings (PEB), Factories, Manufacturing plants, Warehouses, Solar mounting structures, Cold rooms, Food processing plants, Coastal industrial buildings, Airport hangars, Metro stations, Railway platform shelters
Quality Checks That Support Consistent Performance
For critical construction fasteners, consistency matters across lots. Our supply chain emphasizes verification and testing practices such as:
Corrosion resistance testing
Hardness testing
Positive Material Identification (PMI)
Precision dimensional & profile checks
How to Select the Right BIMATAPP® Screw?
Confirm substrate thickness (steel purlin): choose drilling capacity option (up to 5.5mm vs up to 12.5mm).
Calculate clamp thickness: include sheet, insulation/blanket (if any), spacer requirements, and base sheet layers.
Choose length (L): ensure sufficient thread extension beyond the substrate (selection principle aligned to clamp note).
Use washer correctly: bonded EPDM washer must be correctly driven to seal without over-compression.
Installation & Washer
Setting Recommendation
Correct installation improves water-tightness and long-term performance.
3 callouts
Under-driven: may reduce sealing and holding performance
Correctly driven: washer seated properly for reliable seal
Over-driven: may damage washer and increase leakage risk
Get Pricing & Technical Support for BIMATAPP®
Frequently asked questions
It refers to the combination of a stainless steel shank with a carbon steel drill point, designed to balance corrosion resistance with drilling performance.
Yes, BIMATAPP® includes LEVIN® drill point variants with drilling capacity options up to 5.5mm or 12.5mm steel, depending on the variant.
BIMATAPP® is built for roofing applications and includes bonded EPDM washer options to support weather sealing.
Length depends on total clamp thickness (sheet + insulation + supports). Share your stack-up and substrate thickness for the correct recommendation.
